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Vibration bandgap of a locally resonant beam considering horizontal springs J. Vib. Control (IF 2.169) Pub Date : 2021-01-09 Huihuang Bao; Chuanyu Wu; Wenguang Zheng; Bo Yan
Structural vibrations could seriously affect the working performance and even cause fatal hazards to host structures. To reduce low frequency vibrations, a locally resonant metamaterial beam coupled by horizontal springs is proposed. The dynamic model of the metamaterial beam is established with the finite element method. The frequency response function of the metamaterial beam is derived, and the
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Natural vibration characteristics determination of elastic beam with attachments based on a transfer matrix method J. Vib. Control (IF 2.169) Pub Date : 2021-01-02 Dongyang Chen; Chaojie Gu; Minjiao Li; Bowen Sun; Xiaoyin Li
The transfer matrix method for multibody system takes into account the accuracy of the equations of motion and the efficiency of the algorithm. Especially if a system is composed of flexible and rigid components, transfer matrix method for multibody system reduces the dynamics problem to an overall transfer equation which only involves boundary state vectors. The state vectors at the boundary are made
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Coupling effect of unbalanced magnetic pull and ball bearing on nonlinear vibration of motor rotor system J. Vib. Control (IF 2.169) Pub Date : 2020-12-31 Shaojie Guo; Changqing Bai
In this article, the coupling effects of the unbalanced magnetic pull and ball bearing on nonlinear vibration of the three-phase asynchronous motor are investigated with the experimental and numerical methods. A test rig of a motor whose rotor supported by ball bearings is used and a 2 degrees of freedom magnetic solid coupling dynamic model of the motor rotor system is presented. The nonlinear dynamic
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A novel robust finite-time tracking control of uncertain robotic manipulators with disturbances J. Vib. Control (IF 2.169) Pub Date : 2020-12-31 Hamid Razmjooei; Mohammad Hossein Shafiei; Elahe Abdi; Chenguang Yang
In this article, an innovative technique to design a robust finite-time state feedback controller for a class of uncertain robotic manipulators is proposed. This controller aims to converge the state variables of the system to a small bound around the origin in a finite time. The main innovation of this article is transforming the model of an uncertain robotic manipulator into a new time-varying form
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Geometrically nonlinear dynamic analysis of functionally graded porous partially fluid-filled cylindrical shells subjected to exponential loads J. Vib. Control (IF 2.169) Pub Date : 2020-12-31 Majid Khayat; Abdolhossein Baghlani; Seyed Mehdi Dehghan; Mohammad Amir Najafgholipour
This article investigates the influence of graphene platelet reinforcements and nonlinear elastic foundations on geometrically nonlinear dynamic response of a partially fluid-filled functionally graded porous cylindrical shell under exponential loading. Material properties are assumed to be varied continuously in the thickness in terms of porosity and graphene platelet reinforcement. In this study
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Robustly stabilizing proportional integral controller for uncertain system under computational delay J. Vib. Control (IF 2.169) Pub Date : 2020-12-30 Sahaj Saxena; Yogesh V Hote
In a feedback control loop, when there exists a delay in processing the control signal (often called computational delay), it is difficult to stabilize the system, particularly when the system exhibits uncertainty. To solve this problem, we proposed a new robust proportional integral control strategy for a class of uncertain systems exhibiting parametric uncertainty. A two-stage scheme is proposed
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Static and dynamic analysis of a bistable plate under nonlinear magnetic force J. Vib. Control (IF 2.169) Pub Date : 2020-12-30 Negin Habibzadeh; Reza Tikani; Saeed Ziaei-Rad; Mohammad Sina Taki
In this article, bistable laminates are statically and dynamically studied under the existence of nonlinear magnetic force. The bistable laminates with magnetic forces are considered as a nonlinear system for vibration energy harvesting. First, a semi-analytical model was established based on the energy approach for the bistable plate together with magnets. The magnetic force versus distance was measured
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Correlation analysis of noise sound pressure and vibration in aluminum alloy milling J. Vib. Control (IF 2.169) Pub Date : 2020-12-29 Yuting Hu; Shuncai Li; Xing Deng; Slatin Vadim
To study the correlation between noise and vibration during dry milling of aluminum alloy, a synchronous acquisition system of noise and vibration was established. Based on the experimental data, the effects of three milling parameters on milling noise and milling vibration were analyzed. Based on the least square method and MATLAB software programming, the multiple regression models of milling noise
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A novel adaptive control algorithm for the rejection of harmonics in a standard vibrator J. Vib. Control (IF 2.169) Pub Date : 2020-12-29 Chao Li; Chentao Mao; Zhangwei Chen
Because of the nonlinear factors in the standard vibrators, the output waveform of the vibrators is usually distorted, especially in the low-frequency band. Traditionally, the harmonic distortion is suppressed by improved design of the vibrator and feedback control. However, these approaches can just suppress the harmonics to some extent. There are still residual harmonic components which cannot be
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Current harmonic suppression for permanent magnet synchronous motor based on phase compensation resonant controller J. Vib. Control (IF 2.169) Pub Date : 2020-12-29 Peiling Cui; Fanjun Zheng; Xinxiu Zhou; Wensi Li
Permanent magnet synchronous motor always suffers from air gap field distortion and inverter nonlinearity, which lead to the harmonic components in motor currents. A resonant controller is a remarkable control method to eliminate periodic disturbance, whereas the conventional resonant controller is limited by narrow bandwidth and phase lag. This article presents a novel resonant controller with a precise
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Plane waves in anisotropic elastic–plastic material with voids J. Vib. Control (IF 2.169) Pub Date : 2020-12-21 Suraj Kumar; Sushil Kumar Tomar
Dispersion equation is derived for the propagation of one-dimensional plane waves in a general linear anisotropic isothermal elastic–plastic material with voids. The plasticity of the considered material is defined through the dislocation of a single slip plane and direction. The derived dispersion equation is then reduced for the relevant wave propagation in particular media, namely, monoclinic, orthotropic
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Numerical simulation of characteristics of wave propagation and reflection coefficient in a helix-acoustic black hole J. Vib. Control (IF 2.169) Pub Date : 2020-12-21 Sun-Yong Kim; Dooho Lee
A new type of the acoustic black hole beam—a helix-acoustic black hole—is proposed to overcome the spatial restriction on modular acoustic black hole structures. The modular acoustic black hole structure, consisted of a base and several number of acoustic black hole beams, has potential to apply into real engineering world. There are two main sections in an acoustic black hole beam: (1) a uniform thickness
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Wave propagation analysis of thermoelastic functionally graded nanotube conveying nanoflow J. Vib. Control (IF 2.169) Pub Date : 2020-12-20 Jiayin Dai; Yongshou Liu; Guojun Tong
As a hollow cylindrical structure, a nanotube has potential to convey nanoflow, which has opened up a field of research. Functionally graded nanotube as a designable structure with continuous variation of material properties can perform better than uniform nanotube, especially in physical field without introducing large stress concentration. In this article, we take the thermal effect into account
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Dynamic analysis of multiple cracked Timoshenko beam under moving load–analytical method J. Vib. Control (IF 2.169) Pub Date : 2020-12-20 Amin Ghannadiasl; Saeid Khodapanah Ajirlou
When cracks start to surface in the surrounding areas of the structure, they create a local softness zone and influences on the dynamic response of the structure. The beams are more susceptible to shear and flexural cracks because of being subjected to shear and bending stress. In this study, the dynamic response of the single-span and multi-span damped beam under moving load with multi-crack and elastic
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Determination of fundamental coupled torsional—radial frequency of single-walled carbon nanotubes J. Vib. Control (IF 2.169) Pub Date : 2020-12-20 Sneha Singh
Research indicates that single-walled carbon nanotubes have a unique coupled torsional–radial vibration as one of their fundamental modes. Determination of their vibration frequency is required for efficient use of single-walled carbon nanotube in nano-electromechanical systems. However, there is no mathematical expression for these frequencies and their dependence on single-walled carbon nanotube
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Application of scaled boundary finite element method for vibration-based structural health monitoring of breathing cracks J. Vib. Control (IF 2.169) Pub Date : 2020-12-18 Naserodin Sepehry; Mohammad Ehsani; Weidong Zhu; Firooz Bakhtiari-Nejad
The dynamic response of the host structure to a high-frequency actuation is usually used for the detection of tiny damage in structures in the form of breathing crack. The simulation of the microcrack’s effect on the response is essential for several damage identification targets. The conventional finite element method suffers from very small mesh size requirements to address the high-frequency problems
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Study on the vibration isolation performance of an open trench–wave impedance block barrier using perfectly matched layer boundaries J. Vib. Control (IF 2.169) Pub Date : 2020-12-18 Fengxi Zhou; Zhixiong Zhou; Qiang Ma
One of the problems associated with vibration pollution is ground vibration. In view of the isolation of objects protected from ground-transmitted vibrations, a novel type of vibration isolation barrier, an open trench–wave impedance block, is proposed. Based on the perfectly matched layer absorbing boundary, the two-dimensional finite element method in the frequency domain is used to investigate the
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A new criterion for comfort assessment of in-wheel motor electric vehicles J. Vib. Control (IF 2.169) Pub Date : 2020-12-18 Hossein Salmani; Milad Abbasi; Tondar Fahimi Zand; Mohammad Fard; Reza Nakhaie Jazar
A novel optimization technique was implemented to investigate the effects of vibrations on comfort of occupants to maintain oscillations in an acceptable zone in accordance with the International Organization for Standardization 2631 standard. In this regard, a newly introduced comfort indicator was defined as discomfort criterion (DiC). The effectiveness of the proposed measure was investigated throughout
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Multirate iterative learning disturbance observer with measurement delay compensation for flexible spacecraft attitude stabilization subject to complex disturbances J. Vib. Control (IF 2.169) Pub Date : 2020-12-18 Tongfu He; Zhong Wu
Complex disturbances with multifrequency components inevitably exist in the attitude control system of flexible spacecrafts. Multirate iterative learning disturbance observer (MILDO) is a promising solution to estimate and attenuate these disturbances much more accurately. However, measurement delay in the attitude measurement system may severely degrade the estimation performance of MILDO and even
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Radial basis function neural network vibration control of a flexible planar parallel manipulator based on acceleration feedback J. Vib. Control (IF 2.169) Pub Date : 2020-12-18 Long-huan Yu; Zhi-cheng Qiu; Xian-min Zhang
The self-excited vibration of flexible planar 3-RRR parallel manipulators is converted from the residual vibration after high-speed motion and is a resonance of the strongly coupled and nonlinear electromechanical system. This makes the active vibration control quite a challenging task. In this study, we attempt to adopt the radial basis function neural network control algorithm based on acceleration
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Finite element method and analytical analysis of static and dynamic pull-in instability of a functionally graded microplate J. Vib. Control (IF 2.169) Pub Date : 2020-12-18 Arang Pazhouheshgar; Yashar Haghighatfar; Amirhossein Moghanian
The static and dynamic pull-in phenomenon of a functionally graded Al/Al2O3 microplate, considering the damping coefficient and fringing field effects, has been analyzed because of its crucial effect in micro-electromechanical systems application, especially in microswitches. The nonlinear equation of motion of functionally graded microplate has been derived using Hamilton’s principle, and solved analytically
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Broadening perfect sound absorption by composite absorber filled with porous material at low frequency J. Vib. Control (IF 2.169) Pub Date : 2020-12-18 Baozhu Cheng; Nansha Gao; Yunke Huang; Hong Hou
To enhance the low-frequency broadband sound absorption, we propose an absorber filled with porous material and establish a relative acoustic model. Based on the critical coupling condition, a Helmholtz absorber was designed to achieve perfect sound absorption at 172 Hz by the complex frequency plane method. Considering the weak adjustability and acoustic impedance of the Helmholtz absorber, we devised
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Characterization of piezoelectric patch material with hysteresis, saturation, creep, and vibration nonlinearity effects and its application to the active vibration suppression for cantilever beam J. Vib. Control (IF 2.169) Pub Date : 2020-12-18 Mohd Hafiz Abdul Satar; Ahmad Firdaus Murad; Ahmad Zhafran Ahmad Mazlan
This research work aims to investigate the presence of four nonlinear characteristics (i.e., hysteresis, saturation, creep, and uncertainty vibration) when a piezoelectric patch material acts as an actuator and sensor for the active vibration suppression of a cantilever beam. The parameters such as different operating frequencies and voltages are taken into account for the piezoelectric patch material
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Adaptive active vibration control for piezoelectric smart structure with online hysteresis identification and compensation J. Vib. Control (IF 2.169) Pub Date : 2020-12-18 Yuxue Pu; Cheng Yao; Xiaobao Li; Zhaotao Liu
Smart structure vibration reduction based on adaptive active vibration control has become a hot research spot in recent years. A filtered-U least mean square algorithm based on an infinite impulse response filter structure is used to solve the interference of controller output to reference signal. The filtered-U least mean square algorithm is very suitable for the nonlinear vibration control of the
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A perturbation analysis in nonlinear free vibration of a microbeam reinforced by shape memory alloy layer based on the modified couple stress theory J. Vib. Control (IF 2.169) Pub Date : 2020-12-08 Iman Ghaffari; Ardeshir Karami Mohammadi
Numerous applications have been found in various microelectromechanical systems for shape memory alloys. This study analyzes the nonlinear free vibrations of a sandwiched microbeam, consisting of a shape memory alloy core and two elastic layers on either side. The behavior of the shape memory layer is modeled with the one-dimensional Brinson model. The equation of motion is derived from Hamilton’s
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Adaptive neural network and nonlinear electrohydraulic active suspension control system J. Vib. Control (IF 2.169) Pub Date : 2020-11-30 Amhmed M Al Aela; Jean-Pierre Kenne; Honorine A Mintsa
In this article, an adaptive neural network control system is proposed for a quarter car electrohydraulic active suspension system coping with dynamic nonlinearities and uncertainties. The proposed control system is primarily designed to stabilize a sprung mass position of the quarter car electrohydraulic active suspension. Linear controllers such as the proportional–integral–differential controller
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Electricity-structure-fluid coupled modelling and experiment of underwater flexible structure with partially distributed macro fiber composites J. Vib. Control (IF 2.169) Pub Date : 2020-11-30 Junqiang Lou; Tehuan Chen; Yiling Yang; Chao Xu; Hairong Chen; Jianqiang Ma; Yuguo Cui; Guoping Li
Dynamic oscillating behavior of the flexible structure immerged in viscous fluids has attracted growing attention and been widely used in various practical applications. A general electricity-structure-fluid coupled model for the forced dynamic responses of a cantilever immersed in fluids, with partially distributed macro fiber composite, is proposed in this paper. Based on the classical Euler–Bernoulli
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Distributed min-projection control: A switching consensus protocol for switched affine multi-agent systems J. Vib. Control (IF 2.169) Pub Date : 2020-11-25 Behzad Sinafar; Mohammad Ali Badamchizadeh; Hamed Kharrati; Mahdi Baradarannia
In this study, a distributed control problem is addressed for switched affine multi-agent systems. In dynamical systems with an affine control input, the use of error feedback is essential for the realization of consensus protocols, but different from most existing results with affine control multi-agent systems, switched affine multi-agent systems face additional difficulties in the analysis and control;
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A discrete polynomials approach for optimal control of fractional Volterra integro-differential equations J. Vib. Control (IF 2.169) Pub Date : 2020-11-25 Fakhrodin Mohammadi; Leila Moradi; José António Tenreiro Machado
This study develops an efficient numerical method for optimal control problems governed by fractional Volterra integro-differential equations. A new type of polynomials orthogonal with respect to a discrete norm, namely discrete Hahn polynomials, is introduced and its properties investigated. Fractional operational matrices for the orthogonal polynomials are also derived. A direct numerical algorithm
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Effects of concentrated elements on vibro-acoustic characteristics of a circular ring considering both external and internal fluids J. Vib. Control (IF 2.169) Pub Date : 2020-11-25 Mingchang Niu; Yuhong Huang; Jinpeng Su; Hongxing Hua
This study focuses on the vibro-acoustic characteristics of submerged structures with concentrated elements and filled with fluid. A weak formulation is developed based on the modified variational principle. The accurate energy expressions for both structural and acoustic domains are incorporated into the coupled vibro-acoustic model. With introduced Lagrangian multipliers, a domain partitioning technique
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A suspension system with quasi-zero stiffness characteristics and inerter nonlinear energy sink J. Vib. Control (IF 2.169) Pub Date : 2020-11-25 You-cheng Zeng; Hu Ding; Rong-Hua Du; Li-Qun Chen
In this article, a novel vibration control scheme of suspension systems is proposed. It combines the advantages of quasi-zero stiffness isolator, nonlinear energy sink absorber, and inerter. This proposed scheme can achieve low transmissibility, low amplitude, and low additional weight and resolve the conflict between riding comfort and handling stability. Strong nonlinear vibration equations of a
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Modal effective electromechanical coupling coefficient of shear-mode piezoceramic sandwich cantilevers with segmented multicore: Experimental and numerical assessments J. Vib. Control (IF 2.169) Pub Date : 2020-11-25 Pelin Berik; Ayech Benjeddou
Smart sandwich cantilevers with aluminum faces and single and double cores, formed by assembled shear-mode piezoceramic patches with same poling, are experimentally and numerically assessed for the first time. To measure the electromechanical coupling efficiency of such vibrating smart structures, the so-called modal effective electromechanical coupling coefficient is used as a performance indicator
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A spectral framework for the solution of fractional optimal control and variational problems involving Mittag–Leffler nonsingular kernel J. Vib. Control (IF 2.169) Pub Date : 2020-11-25 Haniye Dehestani; Yadollah Ordokhani
A new fractional-order Dickson functions are introduced for solving numerically fractional optimal control and variational problems involving Mittag–Leffler nonsingular kernel. The type of fractional derivative in the proposed problems is the Atangana–Baleanu–Caputo fractional derivative. In the process of the method, we use fractional-order Dickson functions and their properties to provide an accurate
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Free vibration and response of a variable speed rotating cantilever beam with tip mass J. Vib. Control (IF 2.169) Pub Date : 2020-11-24 Li Yun-dong; Hua-bin Wen; Wen-Bo Ning
The study shows a new nonlinear model of a rotating cantilever beam with tip mass. The nonlinear model is built with considering axial geometric nonlinear and large curvature. On the basis of the nonlinear Green strain–displacement relations, the nonlinear motion equations are derived using the Hamilton principle. Applying the proposed dynamic model, the effect of various parameters on the natural
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A study on nonlinear, parametric aeroelastic energy harvesters under oscillatory airflow J. Vib. Control (IF 2.169) Pub Date : 2020-11-24 Mohammad Mehdi Meshki; Ali Salehzadeh Nobari; Mohammad Homayoune Sadr
In this study, based on parametric excitation originating from airflow oscillation, a novel nonlinear aeroelastic energy harvester is proposed. In this respect, first, the governing equation of the system is derived and studied thoroughly to understand the direct and indirect effects of airflow oscillation on the local and global responses of the system. Then, by using a pseudo-arclength continuation
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The effects of tire dynamics on the performance of finite spectrum assignment of vehicle motion control J. Vib. Control (IF 2.169) Pub Date : 2020-11-23 Illés Vörös; Balázs Várszegi; Dénes Takács
The lateral position control of the vehicle is analyzed in the presence of time delay. To compensate the negative effects of dead time, the predictor control approach called finite spectrum assignment is applied. This controller includes a linear model of the plant and uses the solution of this model over the delay interval to predict the current system states. The focus of the article is whether to
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Modeling of tool vibration and its effect on roundness and surface roughness of hole in helical milling of Inconel 718 J. Vib. Control (IF 2.169) Pub Date : 2020-11-23 K Venkata Rao; Chappa Ramesh
Relative vibration between the cutter and workpiece has an influence on the surface generation and dimensional accuracy. In the present work, prediction models were developed for roundness and surface roughness of hole in terms of amplitude and frequency of tool vibration. The proposed methodology carried out a theoretical investigation on the effect of tool vibration components in X- and Y-directions
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H∞ Control law for line of sight stabilization in two-axis gimbal system J. Vib. Control (IF 2.169) Pub Date : 2020-11-23 M. Ashok Kumar; S. Kanthalakshmi
A two-axis gimbaled stabilization system in air vehicles must stabilize the line of sight of the payload toward a target against the external motion induced by air vehicle maneuvering and aerodynamic forces. The target tracking and pointing performances of the air vehicles are largely affected by air vehicle motion decoupling capability. In this work, the H∞ controller design is carried out for a two-axis
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Improved integral force feedback controllers for lightweight flexible structures J. Vib. Control (IF 2.169) Pub Date : 2020-11-23 Florian Lacaze; Ahmad Paknejad; Didier Remond; Simon Chesne
This study studies the performance of an integral force feedback controller for increasing the damping of lightweight flexible structures. Both methods of maximum damping and H∞ optimization are used to tune the parameters of the control system. Two modifications of the integral force feedback are proposed to compensate the effects of a soft stiffness to increase the authority of the actuator. Higher
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White noise wave generation method controlled by a rotary valve J. Vib. Control (IF 2.169) Pub Date : 2020-11-23 Yi Liu; De-xin Chen; Heng Jin; Tao Wang
To meet the demands of white noise waves with different and higher energy spectral density, a new white noise wave generation method was proposed and a corresponding wave-making system controlled by a rotary valve was developed. The theoretical model of the new method was established, and the hydraulic transmission function of the wave-making system was solved. After the control parameters of the white
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Experimental investigation of vibration attenuation on a cantilever beam using air-jet pulses with the particle swarm optimized quasi bang–bang controller J. Vib. Control (IF 2.169) Pub Date : 2020-11-23 Berkan Hizarci; Zeki Kiral
This study deals with the vibration reduction of a cantilever beam using air-jet thruster actuators controlled by the particle swarm optimized quasi bang–bang controller. In this study, the finite element model of a cantilever beam with the lumped mass of actuators is formed for the numerical simulations. Furthermore, the first-order plus dead time transfer function of the air-jet thruster actuator
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Numerical study of variational problems of moving or fixed boundary conditions by Muntz wavelets J. Vib. Control (IF 2.169) Pub Date : 2020-11-23 Ashish Rayal; Sag R Verma
In this study, an approximation method with an integral operational matrix based on the Muntz wavelets basis is presented to solve the variational problems of moving or fixed boundary conditions and a computational algorithm is given for the suggested approach. First, the integral operational matrix is created through the Muntz wavelets. Then, by using this integral operational matrix with Lagrange
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Vibration response and band gap characteristics of functionally graded frame structure J. Vib. Control (IF 2.169) Pub Date : 2020-11-23 Qifa Lu; Chunchuan Liu; Wei Yuan; Wei Wei; Fengming Li
Vibration response and band gap characteristics of the functionally graded frame structures are investigated based on the first-order shear deformation theory. The material properties of functionally graded material rods vary continuously in thickness direction according to a power law. Spectral stiffness matrix of the periodic functionally graded material frame structure in the global coordinate system
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Ensembled local mean decomposition and genetic algorithm approach to investigate tool chatter features at higher metal removal rate J. Vib. Control (IF 2.169) Pub Date : 2020-11-06 Pankaj Gupta; Bhagat Singh
Improper selection of cutting parameters leads to regenerative chatter and loss in productivity. In the present work, a methodology has been proposed to select a proper combination of input cutting parameters for stable turning with improved metal removal rate. Chatter signals generated during the turning of Al6061-T6 have been acquired using a microphone. Stability lobes diagram has been plotted to
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Non-Gaussian additive and multiplicative noise-induced chaos in the lateral vibration of a viscoelastic plate: A fully analytic approach J. Vib. Control (IF 2.169) Pub Date : 2020-10-31 Ali Reza Asnafi
In this study, the chaotic behavior of a viscoelastic plate under integrated non-Gaussian additive and multiplicative bounded noise is investigated with an analytical approach. First, the governing equation of motion of the system was derived by introducing a set of dimensionless parameters. After that, the modified version of Melinkov’s function in terms of statistical indices was obtained, and then
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An expanded impedance control scheme for slosh-free liquid transfer by a dual-arm cooperative robot J. Vib. Control (IF 2.169) Pub Date : 2020-10-30 Babak Naseri Soufiani; Mehmet Arif Adli
The use of robots has been rapidly spreading in different daily applications. The transport of liquids by robot arms without causing any slosh is one of such applications which has recently taken the attention of researchers. Liquid transfer by dual-arm robots causes challenging problems because, in the process of dual-arm cooperation, a closed kinematic chain is formed and a set of constraints appears
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Free vibration and buckling analysis of elastically supported transversely inhomogeneous functionally graded nanoplate in thermal environment using Rayleigh–Ritz method J. Vib. Control (IF 2.169) Pub Date : 2020-10-30 Piyush P Singh; Mohammad S Azam
In this study, free vibration and buckling behaviors of a functionally graded nanoplate supported by the Winkler–Pasternak foundation using a nonlocal classical plate theory are investigated. Eringen’s nonlocal differential model has been used for considering the small-scale effect. The properties of the functionally graded nanoplate are considered to vary transversely following the power law. The
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Continuous convolution and nonlinear transformation for multi-shaker non-Gaussian random vibration control J. Vib. Control (IF 2.169) Pub Date : 2020-10-30 Ronghui Zheng; Yue Lu; Huaihai Chen; Guoping Chen
This study proposes a continuous convolution method combined with memoryless nonlinear transformation for multi-input multi-output stationary non-Gaussian random vibration tests. The challenge of the multi-shaker non-Gaussian random vibration test lies in the coupling problems that are manifested in the inherent physical system and in the existence of cross-spectral densities. In the presented method
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Analytical free vibration solutions of fully free orthotropic rectangular thin plates on two-parameter elastic foundations by the symplectic superposition method J. Vib. Control (IF 2.169) Pub Date : 2020-10-25 Xin Su; Eburilitu Bai
The free vibration of orthotropic rectangular thin plates with four free edges on two-parameter elastic foundations is studied by the symplectic superposition method. Firstly, by analyzing the boundary conditions, the original vibration problem is converted into two sub-vibration problems of the plates slidingly clamped at two opposite edges. Based on slidingly clamped at two opposite edges, the fundamental
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Rail/wheel rolling noise generation due to parametric excitation J. Vib. Control (IF 2.169) Pub Date : 2020-10-25 Anders Nordborg
When a wheel rolls over a railway rail, it ‘sees’ a varying stiffness downwards because the rail is periodically supported by sleepers, leading to parametric excitation of the rail/wheel system. This study investigates the importance of parametric excitation on railway noise generation. Because the problem is non-stationary, it is modelled in the time domain. Rail and wheel impulse response functions
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Analytical and experimental studies on particle damper used for tremor suppression J. Vib. Control (IF 2.169) Pub Date : 2020-10-25 Zheng Lu; Zhikuang Huang
Tremor is an involuntary movement that makes many patients suffer, and passive absorbers used in wearable robot are proved to be effective for tremor suppression. A particle damper is a kind of a passive vibration control device taking advantage of energy dissipation and momentum exchange caused by particle collisions. To apply particle damping technology in reducing tremor amplitude in the human hand
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Delamination area quantification in composite structures using Gaussian process regression and auto-regressive models J. Vib. Control (IF 2.169) Pub Date : 2020-10-21 Jessé Paixão; Samuel da Silva; Eloi Figueiredo; Lucian Radu; Gyuhae Park
After detecting initial delamination damage in a hotspot region of a composite structure monitored through a data-driven approach, the user needs to decide if there is an imminent structural failure or if the system can be kept in operation under monitoring to track the damage progression and its impact on the structural safety condition. Therefore, this study proposes delamination area quantification
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Seismic performance of viscoelastically damped structures at different ambient temperatures J. Vib. Control (IF 2.169) Pub Date : 2020-10-19 Jun Dai; Zhao-Dong Xu; Pan-Pan Gai; Xiao Yan
Experimental results show that mechanical behaviors of viscoelastic dampers are greatly affected by ambient temperature. Neglecting the ambient temperature effect will lead to an inaccurate seismic evaluation on viscoelastically damped structures. This study investigates the ambient temperature effect on the seismic performance of viscoelastically damped structures. An efficient algorithm is proposed
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Robust control of active magnetic bearing systems with an add-on controller to cancel gyroscopic effects: Is it worth it? J. Vib. Control (IF 2.169) Pub Date : 2020-10-15 Alican Sahinkaya; Jerzy T Sawicki
One of the performance-limiting factors in the design of robust controllers for active magnetic bearing systems is the fact that the controller needs to be robust to the gyroscopic effects, that is rotational speed-dependent dynamics of the system. Studies in the literature show that better performance and stability can be achieved when gyroscopic effects are explicitly handled by a cross-feedback
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A robust adaptive control design for active tuned mass damper systems of multistory buildings J. Vib. Control (IF 2.169) Pub Date : 2020-10-15 Rafet Can Ümütlü; Hasan Ozturk; Baris Bidikli
In this study, a robust adaptive controller is designed to be used in an active tuned mass damper system that can be used to damp undesired vibrations that occurred on the multistory buildings during the earthquake. To realize the controller design, all of the system parameters are assumed to be unknown, and the adaptive structure of the designed controller is obtained by designing adaptive compensation
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Vibration analysis of an experimental double bridge crane system with artificial neural networks J. Vib. Control (IF 2.169) Pub Date : 2020-10-13 Şahin Yıldırım; Emir Esim
In crane systems, lifting, carrying and lowering the load from one place have different dynamic effects on the system. One of these dynamic effects is the moving load problem caused by the movement of the load on the crane system. With the increasing technology in recent years, production speeds have increased. For this reason, it has made the requirements for fast-running cranes mandatory for the
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Control flow strategy in a receiver coil for nuclear magnetic resonance for imaging J. Vib. Control (IF 2.169) Pub Date : 2020-10-13 Gabriele Barbaraci
A mathematical discussion is introduced to describe the receiver coil characterizing a nuclear magnetic resonance for imaging, starting from a general shape of the conductor. A set of different inductance calculations have been introduced, varying the shape of the conductor. The inductance calculation led to a general expression of the magnetic field of a single coil characterized by a rectangular
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Dynamic analysis of three-layer cylindrical shells with fractional viscoelastic core and functionally graded face layers J. Vib. Control (IF 2.169) Pub Date : 2020-10-13 Meisam Shakouri; Mohammad Reza Permoon; Abdolreza Askarian; Hassan Haddadpour
Natural frequency and damping behavior of three-layer cylindrical shells with a viscoelastic core layer and functionally graded face layers are studied in this article. Using functionally graded face layers can reduce the stress discontinuity in the face–core interface that causes a catastrophic failure in sandwich structures. The viscoelastic layer is expressed using a fractional-order model, and
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Virtual semi-active damping learning control for robot manipulators interacting with unknown environment J. Vib. Control (IF 2.169) Pub Date : 2020-10-13 Wenrui Wang; Ang Li; Qinwen Li; Jinlin Gu; Qi Huo; Mingchao Zhu; Yanhui Li; Hairong Chu
Position controllers are used for free motion, whereas force controllers are used for constrained motion of robotic manipulators. The hybrid controller switches between position and force control modes depending on whether the manipulator is in contact with the environment. To improve production efficiency, the velocity of contact between the manipulator and environment is not set to zero. However
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Moving sensors for improved estimation of dynamic structures: Experimental validation J. Vib. Control (IF 2.169) Pub Date : 2020-10-08 Maria Chierichetti; Michael Demetriou
In the monitoring of structural systems, the use of multiple high-end sensors may prove to be economically prohibitive. The alternative approach would be to use fewer devices capable of moving across the span of the structural system. In the proposed approach, a velocity sensor that is able to move across the spatial domain and obtain point-wise velocity measurements is combined to a novel dynamic
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