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Effect of contact length of bias ply tractor tire on its tractive performance J. Terramech. (IF 2.4) Pub Date : 2024-03-14 Harsha Chandrakar, Hifjur Raheman
In order to study the effect of contact length of tire on tractive performance of tractor, experiments were conducted using a single wheel tester fitted with 13.6–28 bias ply tire in a soil bin in soft soil condition. Contact length and contact width were measured at different normal loads (9.8 kN and 13.72 kN) and inflation pressures (83, 103, 124 and 138 kPa). Results showed that the contact length
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Comparative study of terramechanics properties of spherical and cylindrical feet for planetary legged robots on deformable terrain J. Terramech. (IF 2.4) Pub Date : 2024-03-12 Huaiguang Yang, Chu Zhang, Liang Ding, Qingqing Wei, Haibo Gao, Guangjun Liu, Liyuan Ge, Zongquan Deng
Legged robots exhibit superior adaptability to complex extraterrestrial environments compared to wheeled mobile robots. However, legged robots employed in planetary exploration face challenges in dealing with soft terrains. This paper focuses on investigating the issues of large foot sinkage and slip encountered by legged robots on soft terrain. Extensive experiments on quasi-static loading, loading
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Tensor-train compression of discrete element method simulation data J. Terramech. (IF 2.4) Pub Date : 2024-02-27 Saibal De, Eduardo Corona, Paramsothy Jayakumar, Shravan Veerapaneni
We propose a framework for discrete scientific data compression based on the tensor-train (TT) decomposition. Our approach is tailored to handle unstructured output data from discrete element method (DEM) simulations, demonstrating its effectiveness in compressing both raw (e.g.particle position and velocity) and derived (e.g.stress and strain) datasets. We show that geometry-driven “tensorization”
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Plowing drag-adaptive operation control method based on motor temperature compensation for electric tractor J. Terramech. (IF 2.4) Pub Date : 2024-01-18 Qi Wang, Xudong Wang, Wei Wang, Yongjie Cui, Yuling Song
Traditional plowing efficiency control methods are difficult to balance the tillage efficiency and uniform plowing depth, and the impact of the motor temperature rise on the control accuracy cannot be ignored during electric tractor operations. Therefore, a plowing drag-adaptive operation control method considering the motor temperature rise was proposed for an electric tractor equipped with a sliding
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Modelling soil-rotor blade interaction of vertical axis rotary tiller using discrete element method (DEM) J. Terramech. (IF 2.4) Pub Date : 2024-01-18 Prakhar Patidar, Peeyush Soni, Achala Jain, Vijay Mahore
Vertical-axis rotary tillers are preferred over other soil-engaging tools for inter-culture operations due to their superiority in avoiding tillage pan formation, facilitating drainage, and operability at higher forward speeds. To optimize their design and operation, and to promote sustainable agricultural practices, a greater understanding of the kinematics, dynamics, and soil-structure interaction
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Co-simulation for optimal working parameter selection during soil vibratory compaction process J. Terramech. (IF 2.4) Pub Date : 2024-01-12 Jianjun Shen, Zheng Tang, Feng Jia, Zhen Liu, Jingru Hou
The working parameters of vibratory rollers have an important effect on the compaction quality. The traditional method of obtaining the best working parameters through field tests is time-consuming and laborious. In order to determine the best working parameters more conveniently and accurately, a mechanical-hydraulic-finite element co-simulation method is proposed in this paper. This method considers
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Study of passive steering mechanism for small Mars surface exploration rovers J. Terramech. (IF 2.4) Pub Date : 2023-12-19 Asahi Oe, Shin-Ichiro Nishida, Shintaro Nakatani
Planetary surface exploration rovers are required to have the ability to travel over uneven ground such as sandy or rocky terrain. In addition, to maintain long-term functionality under severe mass constraints, the rover must be highly reliable with a simple configuration. The reduction in the number of actuators will also contribute to a reduction in the number of electrical components involved and
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Effects of vertical load and inflation pressure on tire-soil interaction on artificial soil J. Terramech. (IF 2.4) Pub Date : 2023-12-15 Nisreen Alkhalifa, Mehari Z. Tekeste, Pius Jjagwe, Thomas R. Way
Instrumented single tire soil bin testing was conducted on a rigid surface and artificial soil by vertically loading a radial tire (LT235/75R15) to two tire vertical loads (6 kN and 8 kN) inflated to three levels of tire inflation pressure (179, 241, and 283 kPa). Lowering the tire inflation pressure by 37 % resulted in 26 % (6 kN vertical load) and 39 % (8 kN vertical load) greater contact lengths
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The running gear construction impact on overcoming obstacles by light high-mobility tracked UGV J. Terramech. (IF 2.4) Pub Date : 2023-12-11 Daniela Szpaczyńska, Marian Łopatka, Piotr Krogul
Rubber tracked running gears are widely used in high-mobility Unmanned Ground Vehicles (UGV) to increase obstacle negotiation possibility in urban and rural terrain. The paper proposes a method of assessing the mobility level of the light UGV‘s tracked running gears in terms of their ability to overcome terrain obstacles. A model of rubber track system was created in the MSC ADAMS environment. A track-ground
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Design and implementation of a novel apparatus for terramechanics studies of helical scrolls J. Terramech. (IF 2.4) Pub Date : 2023-11-20 Manmeet Brar, Jorge Villacrés, Shayan Meschian, Martin Barczyk, Michael Lipsett
Modeling the force interaction between a wheel and the ground is necessary when evaluating the effectiveness of a vehicle’s mobility on challenging terrain. Soft soils with low bearing strength are a particularly difficult medium for wheeled vehicles. Helical scrolls have shown promise as an alternative to wheels which can work across a range of terrains, warranting a detailed terramechanics study
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A review of soil modeling for numerical simulations of soil-tire/agricultural tools interaction J. Terramech. (IF 2.4) Pub Date : 2023-10-13 Dhruvin Jasoliya, Alexandrina Untaroiu, Costin Untaroiu
The study of deformable soils is one of the key factors in determining the tire, vehicle and/or agricultural tool design parameters. This literature review provides a brief overview of soil classification, soil testing, soil constitutive models, and numerical approaches utilized to model soil-tire/tool interaction. In the past, empirical, semi-empirical, and analytical soil models were used in these
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Deep learning-based soil compaction monitoring: A proof-of-concept study J. Terramech. (IF 2.4) Pub Date : 2023-10-11 Shota Teramoto, Shinichi Ito, Taizo Kobayashi
The dynamic behavior of the vibratory drum of a soil compactor for earthworks is known to be affected by soil stiffness. Real-time monitoring techniques measuring the acceleration of vibratory drums have been widely used for soil compaction quality control; however, their accuracy can be affected by soil type and conditions. To resolve this problem, a novel deep learning-based technique is developed
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Discrete element contact model and parameter calibration for clayey soil particles in the Southwest hill and mountain region J. Terramech. (IF 2.4) Pub Date : 2023-10-13 Le Yang, Junwei Li, Qinghui Lai, Liangliang Zhao, Jianjian Li, Ronghao Zeng, Zhihong Zhang
Distinct physical properties of red clay soil in hilly and mountainous regions of southwest China, including high adhesiveness and density, challenge the operation of agricultural machinery. A scarcity of accurate discrete element simulation parameters for this soil type restricts computational modeling. The study was focused on red clay soil with a moisture content of 12.50% ± 1% and a measured repose
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Machine learning-based draft prediction for mouldboard ploughing in sandy clay loam soil J. Terramech. (IF 2.4) Pub Date : 2023-09-20 Vijay Mahore, Peeyush Soni, Arpita Paul, Prakhar Patidar, Rajendra Machavaram
Machine learning (ML) models are developed to predict draft for mouldboard ploughs operating in sandy-clay-loam soil. The draft of tillage tools is influenced by soil cone-index, tillage-depth, and operating-speed. We used a three-point hitch dynamometer to measure draft force, a cone penetrometer for soil cone-index, rotary potentiometers for tillage-depth, and proximity sensors for operating-speed
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Analysis of soil compaction under different wheel applications using a dynamical cone penetrometer J. Terramech. (IF 2.4) Pub Date : 2023-09-15 Rania MAJDOUBI, Lhoussaine MASMOUDI, Abderahmane ELHARIF
Soil compaction is one of the major problems in modern agriculture. Thus, the workability of a soil reflects to its ability to accept the traffic of agricultural machinery and implements. Water content and compaction are factors that influence the rheological behavior of the soil. the representation of soil shows limitations regarding the behavior of the tire-soil interface and its resistance to deformation
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A terramechanics model for high slip angle and skid with prediction of wheel-soil interaction geometry J. Terramech. (IF 2.4) Pub Date : 2023-09-13 Catherine Pavlov, Aaron M. Johnson
Previously developed terramechanics models of wheel-soil interaction forces do not cover the full span of possible wheel states, including large slip angles and ratios. This paper synthesizes a model that covers the full range of slip and skid ratios and slip angles by building on classic terramechanics and soil failure models. The need for wheel and soil specific tuning is reduced through use of a
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An analytical model for stress estimation at the soil-tire interface using the dynamic contact length J. Terramech. (IF 2.4) Pub Date : 2023-09-09 Behzad Golanbari, Aref Mardani
The interaction between soil and tire is a complex phenomenon influenced by various factors, such as soil properties, vertical load on the wheel, and tire characteristics. However, estimating stress at the tire-soil interface is a challenging task due to the unpredictable nature of soil. Existing models for investigating the wheel-soil interaction are based on soil mechanical parameters, which are
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Modelling and experimental identification of spring-damping properties of the off-road vehicle rubber tracks, rubber belts, and rubber-bushed tracks subjected to flexural vibrations J. Terramech. (IF 2.4) Pub Date : 2023-09-04 Jakub Chołodowski
In the article, a model for predicting the energy losses caused by the flexural vibrations of rubber tracks, rubber belts, and rubber-bushed metal link-tracks for off-road vehicles is proposed, and a test stand and an experimental procedure are developed to identify the mechanical parameters of this model. The track or belt is represented by a chain of discrete rigid links connected by revolute joints
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Research on drag reduction performance of sliding plate of rice direct seeding machine based on non-smooth structure of loach surface J. Terramech. (IF 2.4) Pub Date : 2023-09-02 Hongchang Wang, Kaiquan Ding, Guozhong Zhang, Zhen Jiang, Abouelnadar El. Salem, Yuan Gao
Sliding plate has the problems of large sliding resistance and serious soil adhesion. Loach moves freely and flexibly in mud, has highly efficient lubrication and drag reduction effects. The sliding plate of rice direct seeding machine was selected as the research object and loach as the bionic prototype. The macroscopic and microscopic structure characteristics of loach were observed, the body surface
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Push-pull locomotion: Increasing travel velocity in loose regolith via induced wheel slip J. Terramech. (IF 2.4) Pub Date : 2023-09-02 Cyndia Cao, Deaho Moon, Colin Creager, Dennis K. Lieu, Hannah S. Stuart
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A photoelastic method for stress analysis of granular terrain beneath a wheel J. Terramech. (IF 2.4) Pub Date : 2023-08-25 Yuto Yoshida, Hikari Sakada, Sota Yuasa, Kenji Nagaoka
This paper presents a photoelastic method for the stress analyses of granular terrains beneath a traveling wheel. Recently, wheel terramechanics have been studied using various advanced techniques such as particle velocimetry and machine learning. However, the dynamic profiles of the stress distributions in soil have not been directly observed. In this paper, we propose a photoelastic method to experimentally
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Coupled nonlinear controller for vehicle trajectory tracking in a deformable soil: Application to a four-wheeled mobile agricultural robot J. Terramech. (IF 2.4) Pub Date : 2023-08-24 Rania Majdoubi, Lhoussaine Masmoudi, Abderrahmane Elharif
In this paper, the coupled longitudinal and lateral control of the mobile agricultural robot “Agri-Eco-Robot’’ is addressed. As a first step, the Newton's law is used to develop the dynamical modeling of the mobile agricultural robot. The wheel-ground contact is modeled using the Terramechanics law called Extended-Bekker. The validation of the developed vehicle model was then conducted using an automotive
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Machine learning approach for predicting soil penetration resistance under different moisture conditions J. Terramech. (IF 2.4) Pub Date : 2023-08-18 Anis Elaoud, Hanen Ben Hassen, Rim Jalel, Nahla Ben Salah, Afif Masmoudi, Atef Masmoudi
The investigation and evaluation of the phenomenon of soil compaction after the passage of repetitive equipment (Tractor, cultivator..) is considered as a preventive solution to preserve agricultural soils against degradation and maintain sustainable agriculture. In reality, there is currently no reliable method for predicting the primary causes of soil compaction, particularly in moist soils. This
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Development of a tire testing machine for evaluating the performance of tractor tires based on the soil compaction J. Terramech. (IF 2.4) Pub Date : 2023-07-18
Soil compaction, which is more effective than soil shear owing to the weight of tractor tires, reduces sugarcane cultivation. Instead of a field study, a single-wheel tester is more suitable for studying the tractor tire tracks on a soil bin in a laboratory. However, the soil compaction measurement is time consuming and analyzes the bulk density only at the sampling point of the track. In this study
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Optimization of grouser shape ratio for coastal terrain driving device using discrete element method J. Terramech. (IF 2.4) Pub Date : 2023-07-19
Using the discrete element method (DEM), this study derived the optimal shape ratio of a grouser driving in a coastal terrain. To develop a DEM model that considers the properties of the coastal terrain, experiments were performed on the physical and mechanical properties of the terrain, and parameters of the DEM model were calibrated using the experimental results. In addition, a terramechanical experiment
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A tractor hydraulic assisted embedded microprocessor-based penetrometer for soil compaction measurement J. Terramech. (IF 2.4) Pub Date : 2023-07-17
Measurement of soil compaction in terms of penetration resistance using a hand penetrometer requires more time and effort. A tractor hydraulic-assisted embedded microprocessor-based penetrometer was developed to make the results easy to monitor and decrease human error. The developed penetrometer consisted of a driving system for pushing the penetrometer probe into the soil at a desired speed, a sensor
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A single wheel test rig for ocean world rovers J. Terramech. (IF 2.4) Pub Date : 2023-07-10 Athul Pradeepkumar Girija, Rachana Agrawal, Ye Lu, Archit Arora, Maxim de Jong, Sarag J. Saikia, James M. Longuski
Ocean Worlds such as Europa and Enceladus are known to harbor subsurface liquid water oceans under their icy crust and are high-priority targets for in situ exploration. Compared to the Moon and Mars, Ocean Worlds likely present a significantly more challenging environment for surface mobility systems due to the extremely cold temperature, high radiation dosage, and poorly constrained material properties
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The effect of integrating a bio-inspired convex structure with a low-surface energy polymer on soil adhesion and friction J. Terramech. (IF 2.4) Pub Date : 2023-07-08 Abouelnadar El Salem, Guozhong Zhang, Hongchang Wang, Haytham M. Salem, Mohamed A.I. Abdalla, Ahmed A. Ghazy
The capacity of soil-burrowing animals to move freely in sticky soil is a motivational trait for developing soil-engaging tools with high operational efficiency. Meanwhile, outstanding hydrophobicity, chemical stability, and corrosion resistance make ultra-high molecular weight polyethylene (UHMW-PE) a potential option for reducing soil adhesion. This study looked into the viability of combining a
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Construction of a soil clod recognition bench-scale experiment for discrete element method modeling of tilling phenomena J. Terramech. (IF 2.4) Pub Date : 2023-07-04 Shuto Ishii, Isami Suto, Hiroaki Tabe, Kota Aono, Moju Zhao, Yoshifumi Ueshige, Kohei Matsushita, Takashi Iritani, Tadayuki Hanamoto, Masayuki Nakao, Keisuke Nagato
Rotary claws are used to break soil into small pieces and plow the soil flat. In this study, rotary claw development in tiller machines was evaluated using both equipment and the discrete element method (DEM). However, evaluation through equipment is imprecise and time consuming. Although DEM is an effective method for modeling the movement of granular materials, it requires numerous parameters to
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Review of modeling and validation techniques for tire-deformable soil interactions J. Terramech. (IF 2.4) Pub Date : 2023-07-04 Varsha S Swamy, Rashna Pandit, Alba Yerro, Corina Sandu, Denise M. Rizzo, Katherine Sebeck, David Gorsich
The mobility of vehicles in off-road environments is critical for many applications. Predicting the tire-soil interaction is a challenge, especially in non-linear deformable terrain. This paper presents an overview of the bibliographic references on tires–deformable soil interactions after the 2000's, identifying the gaps in the literature. The capabilities and challenges of different modeling frameworks
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Experimental investigation of factors affecting the characterisation of soil strength properties using a Bevameter in-situ plate sinkage and shear test apparatus J. Terramech. (IF 2.4) Pub Date : 2023-06-23 Ray Kruger, P. Schalk Els, Herman A. Hamersma
The Bekker-Wong soil-wheel interaction model has been widely adopted in the terramechanics field. This model requires the soil to be characterised using a Bevameter, which entails performing in situ plate sinkage and shear stress tests. Bevameter soil characterisation is not a standardised test procedure, and the test setup may influence the identified soil model parameters. This study investigates
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On the power characteristics of an unmanned tracked vehicle for autonomous transportation of agricultural payloads J. Terramech. (IF 2.4) Pub Date : 2023-06-09 S.M. Shafaei, H. Mousazadeh
Elucidation of power characteristics of an unmanned tracked vehicle for autonomous transportation of agricultural payloads in greenhouse constructions leads to appearance of an applied research in this study. This novel aim has been chosen based on operational requirement of the vehicle. Hence, it can be highlighted that this paper is initiative study described results of power efficiencies (motion
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Justification of the soil dem-model parameters for predicting the plow body resistance forces during plowing J. Terramech. (IF 2.4) Pub Date : 2023-06-09 Salavat Mudarisov, Yakov Lobachevsky, Ildar Farkhutdinov, Eduard Khasanov, Ildar Rakhimov
The discrete element method has recently become a popular tool for developing soil models to be used for modelling the tillage process, which involves using working tools. The research aims to evaluate the parameters of the contact model particles when modelling tillage with large–sized working tools using the discrete element method. The paper presents the results of calibration of the physico-mechanical
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Obstacle detection in snow covered terrain J. Terramech. (IF 2.4) Pub Date : 2023-06-06 S.N. Vecherin, J.M. Shaker, M.W. Parker
This work describes an automatic detection method of obstacles covered by snow. The method is based on the detection of statistical anomalies relative to an estimated background image which contains no obstacles. The sensitivity of the detection can be adjusted by a specified probability of false alarms, and the obstacle detection confidence is characterized by a probability of detection. Statistical
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Numerical analysis of wheel locomotion on soft soil using the extended terramechanics model based on cellular automata J. Terramech. (IF 2.4) Pub Date : 2023-06-07 Yutaro Watanabe, Shingo Nakano, Hirotaka Suzuki, Shingo Ozaki
The evaluation of the traveling performance of moon/planetary exploration rovers is the primary aspect of scientific missions and human exploration in space. However, conventional models lack the detailed description of mechanical interaction between the wheels and soft soil. Therefore, in this study, the effectiveness of an extended terramechanics (xTerramechanics) model was investigated by considering
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Three-dimensional DEM tillage simulation: Validation of a suitable contact model for a sweep tool operating in cohesion and adhesion soil J. Terramech. (IF 2.4) Pub Date : 2023-05-23 Chunling Zhang, Jin Xu, Zihao Zheng, Weiwei Wang, Lichao Liu, Liqing Chen
Discrete element modelling (DEM) is widely used to estimate soil-tool interaction and tillage forces. To run an accurate simulation, it is essential to determine the appropriate DEM contact model and parameters. Although previous work has been introduced to determine the DEM contact model and parameters, the accuracy of numerical simulation is not high because of the soil differences when tillage tools
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Literature review on Archimedean screw propulsion for off-road vehicles J. Terramech. (IF 2.4) Pub Date : 2023-05-18 Jorge Villacrés, Martin Barczyk, Michael Lipsett
This paper provides a comprehensive review of the published literature on screw propulsion for off-road vehicles and amphibious transportation, from its origins in the 18th century to the present day. Additionally, this work describes the basis and elements of an archimedean scroll propulsion mechanism and discusses the most developed dynamic models available in the literature and their limitations
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Correlations between moisture content and color spectrum of sandy soils J. Terramech. (IF 2.4) Pub Date : 2023-05-17 György Pillinger, Ahmed Elawad Eltayeb Ahmed, Kornél Bessenyei, Péter Kiss
It is a well-known phenomenon that the color of sand changes due to moisture. As the moisture content increases, the sand will typically become darker. In our research, we are looking for the answer to the exact function according to which this darkening process changes and what relationship there may be between the different, initial (dry) soil colors and how this relationship can influence the evolution
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Terrain classification using mars raw images based on deep learning algorithms with application to wheeled planetary rovers J. Terramech. (IF 2.4) Pub Date : 2023-04-25 Junlong Guo, Xingyang Zhang, Yunpeng Dong, Zhao Xue, Bo Huang
Scene information plays a crucial role in motion control, attitude perception, and path planning for wheeled planetary rovers (WPRs). Terrain recognition is the fundamental component of scene recognition. Due to the rich information, visual sensors are usually used in terrain classification. However, teleoperation delay prevents WPRs from using visual information efficiently. End-to-end learning method
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Investigation of the predictability of mouldboard plough draught from soil mechanical strength (cone index vs. shear strength) using finite element modelling J. Terramech. (IF 2.4) Pub Date : 2023-04-17 Mojtaba Naderi-Boldaji, Seyed Hossein Karparvarfard, Hadi Azimi-Nejadian
Prediction models for draught of tillage implements using soil variables which can be readily measured in the field are important tools in agricultural machinery management. In our previous study, a regression model for draught of a cylindrical mouldboard plough as a function of soil water content, bulk density, ploughing depth and speed was developed using a finite element (FEM) model. This study
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Modeling tire-soil compression resistance on artificial soil using the scaling law of pressure-soil sinkage relationship J. Terramech. (IF 2.4) Pub Date : 2023-04-13 Pius Jjagwe, Mehari Z. Tekeste, Nisreen Alkhalifa, Thomas R. Way
Semi-empirical traction models utilize soil parameters estimated from ASABE cone and flat plate soil sinkage data; however, limited studies apply the scaling law of the soil measurement tool to a full-scale tire-to-soil system for various initial soil conditions. This study investigated the effects of three scaled plates (size and shape) and two soil bulk density conditions on pressure-sinkage relationships
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Selection of parameters of the disc working bodies of the ripping-separating machine for soil treatment J. Terramech. (IF 2.4) Pub Date : 2023-04-07 Yuri Syromyatnikov, Sergey Voinash, Irina Troyanovskaya, Evgeny Tikhonov, Svetlana Partko, Viktoriia Sokolova
Mechanical tillage with the help of a soil-cultivating ripping-separating machine is based on the combination of the operation of crushing and separating the soil along the depth of the cultivated layer. When moving the plowshare at a depth of 0.03–0.1 m, the movement of soil along the plowshare is complicated by the formation of an additional soil layer in front of it. To avoid this phenomenon, it
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Terramechanics models augmented by machine learning representations J. Terramech. (IF 2.4) Pub Date : 2023-03-28 Eric Karpman, Jozsef Kövecses, Marek Teichmann
The field of terramechanics focuses largely on two types of simulation approaches. First, the classical semi-empirical methods that rely on empirically determined soil parameters and equations to calculate the soil reaction forces acting on a wheel, track or tool. One major drawback to these methods is that they are only valid under steady-state conditions. The more flexible modelling approaches are
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A bionic mechanical foot with adaptive variable postures travelling on sand J. Terramech. (IF 2.4) Pub Date : 2023-03-24 Rui Zhang, Xumin Sun, Dianlei Han, Rui Zhang, Hua Zhang, Jia Ma, Lige Wen, Meng Zou
In this study, an adaptive variable posture bionic mechanical foot is designed, which enables the transformation of different postures during the touchdown period. At the same time, the bolts at the joints are tightened to enable the non-variable configuration function of the bionic mechanical foot. A test rig was used to test the travelling and traction performance of the bionic mechanical foot at
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Review on soil shear strength with loam sand soil results using direct shear test J. Terramech. (IF 2.4) Pub Date : 2023-03-22 Alaa El Hariri, Ahmed Elawad Eltayeb Ahmed, Péter Kiss
This article aims to give a background about the soil shear strength and its measurement methods based on scientific articles and the work of researchers. A brief introduction is given about terramechanics science and the loads acting at the interaction zone between the tractive element (wheel/track) and the terrain. The most important loads exciting the terrain from the machine’s tractive element
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Load bearing capacity of finite half space agricultural homogeneous soil J. Terramech. (IF 2.4) Pub Date : 2023-03-21 Nihal D. Salman, György Pillinger, György Sitkei, Péter Kiss
A comprehensive plate-sinkage equation is necessary for the description of the load bearing capacity of soils. In the last century, several improvements to the existing equations were attempted but with limited success. The main aim of this paper is to verify, evaluate and develop a load bearing capacity theory of finite half space soil. Agricultural soils may be regarded as a finite half space in
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Discrete element modelling of soil pressure under varying number of tire passes J. Terramech. (IF 2.4) Pub Date : 2023-03-09 Kobby Acquah, Ying Chen
Pressure imposed on an arable farmland by farm machinery can lead to severe soil compaction. A model was developed with Discrete Element Method (DEM) to simulate soil – tire interaction. Virtual dead weight method was performed for the purpose of model calibration. Simulated soil pressure data were obtained from the topsoil layer under varying number of tractor tire passes (1P, 2P, 3P, 4P, 5P, 6P,
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Geotechnical assessment of terrain strength properties on Mars using the Perseverance rover’s abrading bit J. Terramech. (IF 2.4) Pub Date : 2023-02-16 Eloïse Marteau, Kristopher Wehage, Shoya Higa, Scott Moreland, Gareth Meirion-Griffith
An instrument for measuring the geotechnical properties of the Martian soil provides high-value science opportunities and high-priority mission-support capabilities that serve reconnaissance, science, and engineering. Such instrument can be used to characterize the terrain for drilling, landing, trafficability, and other surface operations. However, to date, instruments for measuring geotechnical properties
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Development of an artificial neural network model with graphical user interface for predicting contact area of bias-ply tractor tyres on firm surface J. Terramech. (IF 2.4) Pub Date : 2023-02-07 Rajesh Yadav, Hifjur Raheman
An Artificial Neural Network (ANN) model was developed for predicting the contact area and ground pressure of bias-ply tractor tyres. A Graphical User Interface (GUI) using Tkinter was created to deploy the developed ANN model. A total of 538 datasets for the 12.4–28, 13.6–28, 14.9–28 and 16.9–28 tyres by varying load on tyres (600 to 1950 kg) and inflation pressure (69 to 234 kPa) were collected from
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Improvement of the design of the plow-subsoiler-fertilizer to increase soil fertility J. Terramech. (IF 2.4) Pub Date : 2023-02-01 Nikolay Romanyuk, Valery Ednach, Sayakhat Nukeshev, Irina Troyanovskaya, Sergey Voinash, Marat Kalimullin, Viktoriia Sokolova
The use of intensive technologies for the cultivation of agricultural crops provides for the application of fertilizers in the process of tillage. This reduces the compaction of the soil, increases its fertility and the quality of the crop. The purpose of these studies is to develop a universal working tool that allows you to combine several technological operations in one pass of the unit. The authors
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Vehicle design for terrain mobility: A modeling technique of powertrain power conversion and realization J. Terramech. (IF 2.4) Pub Date : 2023-01-25 Vladimir V. Vantsevich, David J. Gorsich, Dmytro O. Volontsevych, Ievhenii A. Veretennikov, Jesse R. Paldan, Lee Moradi
Vehicle terrain mobility characteristics, provided by the powertrain and running gear, are realized in dynamic interactions between the wheels and terrain. Approaches to modeling and simulation of vehicle-terrain interaction and mobility characteristics as well as engineering approaches to design powertrain sub-systems together pre-determine a vehicle’s technical success or failure before it touches
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Gradeability of ‘Zhu Rong’ Mars rover based on the simulated Martian terrain J. Terramech. (IF 2.4) Pub Date : 2023-01-24 Yansong Liu, Yingchun Qi, Dong Pan, Zhen Chen, Baofeng Yuan, Meng Zou
Due to the long-term weathering and erosion climate, many craters terrains on the surface of Mars are covered with loose weathered sedimentary debris, and Mars rovers traversing these slope-like terrains with soft soils will easily slip or even sink, and may affect the survey missions. Therefore, it is important to study the climbing ability of Mars rovers for Mars exploration missions. This work testes
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A novel evaluation method for rolling energy losses of tacked vehicle road wheels using experimental modal analysis J. Terramech. (IF 2.4) Pub Date : 2023-01-12 Chengwei Zhu, Ye Zhuang, Weiguang Fan, Zhenxin Long, Shuyu Zhang
A novel evaluation method for rolling energy losses of road wheels of tracked vehicle is proposed, in which damping of road wheel surface is identified based on single vibration excitation and single point picking up frequency response function using a simplified modal experiment with an acceleration sensor. Three road wheels of tracked vehicle with different tread rubber are utilized as specimens
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Numerical analysis of steady-state mechanical characteristics of the flexible spoke non-pneumatic tire under multiple working conditions J. Terramech. (IF 2.4) Pub Date : 2022-12-21 Laiyun Ku, Hongxun Fu, Kai Chen, Jinyan Zhang, Senyu Bi, Lei Zhou
Since the research on the steady-state mechanical characteristics of the non-pneumatic tire is not perfect at present, in order to comprehensively explore the steady-state mechanical characteristics of a new flexible spoke non-pneumatic tire (FSNPT), the steady-state mechanical simulations under multiple working conditions are carried out. The three-dimensional model and numerical analysis model of
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Analyzing mobility trends of tracked vehicles on fine-grained soils in a progressive slip condition using full-scale test data presented in DROVE 3.0 J. Terramech. (IF 2.4) Pub Date : 2022-12-15 Arman Borazjani, Isaac L. Howard, Zach Griffing, Ashley S. Carey, Farshid Vahedifard, George L. Mason, Jody D. Priddy
In 2013, an extensive effort began to create a consolidated off-road vehicle mobility database named DROVE (Database Records for Off-road Vehicle Environments). DROVE consists of over 8,500 experimental test records measured over several decades for wheeled and tracked vehicles over various terrains. This paper introduces the third release of DROVE, which adds results from 193 tests primarily consisting
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Off-road terrain classification J. Terramech. (IF 2.4) Pub Date : 2022-12-08 Lafras Fritz, Herman A. Hamersma, Theunis R. Botha
Road traffic accidents place a burden on the global economy. This impact is reduced by the development of safer vehicles. Advanced Driver Assist Systems (ADAS) aim to reduce the frequency and severity of accidents. ADASs are designed to operate in well-defined environments, such as first world urban areas. However, 93% of fatal accidents occur in developing countries; areas often without properly maintained
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Development of a mathematical model for determining the draft force of ard plow in silt clay soil J. Terramech. (IF 2.4) Pub Date : 2022-12-09 Thomas Gebre, Zewdu Abdi, Amana Wako, Teshome Yitbarek
Due to Ethiopia's rising population, the prediction of a draft force has several crucial in improving tillage performance in smallholder farmland. It helps in proper usage of animal draught; minimizes operator tragedy and full input data for the ard plow designer. This study aimed to develop an effective mathematical model by selecting appropriate soil properties, tool geometries, and tillage operating
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Modelling and control strategies in path tracking control for autonomous tracked vehicles: A review of state of the art and challenges J. Terramech. (IF 2.4) Pub Date : 2022-11-25 Noor Amira Ilyanie Ruslan, Noor Hafizah Amer, Khisbullah Hudha, Zulkiffli Abdul Kadir, Saiddi Ali Firdaus Mohamed Ishak, Syed Mohd Fairuz Syed Dardin
This paper provides a review of path tracking strategies used in autonomous vehicle control design. Several elements of modelling process and path tracking control are examined, including the vehicle model implemented, the path tracking control algorithms used, and the criteria for evaluating the controller's performance. Path tracking control is classified into several forms based on its methodology
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Water hazard detection: A 20-year review J. Terramech. (IF 2.4) Pub Date : 2022-11-21 Xiaodong Guo, Jizhou Han, Jingyu Li, Zhoubo Wang, Zhenhai Zhang, Xiao Kang, Wei Zhu, Hongbin Deng
Obstacle detection is a complex task involving detection of obstacle features, identification of appropriate sensor and environmental conditions. The development of water hazard detection in the past two decades can be regarded as a microcosm of the history of typical obstacle detection. This review provides an extensive study of water hazard detection papers spanning a quarter-century (the 1990 s