The explosive growth of network data traffic puts new demands on traffic scheduling. In this paper, the scheduling algorithm based on the software-defined network (SDN) architecture is studied. Firstly, the SDN architecture was introduced, then an SDN-based adaptive multi-path load balancing algorithm was proposed and finally the algorithm was simulated on the Mininet simulation platform to compare

AbstractThe model under consideration in this paper describes a vibrating structure of an interfacial slip and consists of three coupled hyperbolic equations in one-dimensional bounded interval under mixed homogeneous Dirichlet–Neumann boundary conditions. The first two equations are related to Timoshenko-type systems and the third one is subject to the dynamics of the slip. The main problem we discuss

In this paper, we propose an linear matrix inequality (LMI)-based design method to observer-based control problem of linear descriptor systems with multiple time-varying delays. The delay function can be continuous and bounded but not necessarily differentiable. First, by introducing a new set of improved Lyapunov–Krasovskii functionals that avoid calculating the derivative of the delay function, we

For the multisensor time-varying networked mixed uncertain systems with random one-step sensor delays and uncertain-variance multiplicative and linearly dependent additive white noises, a new augmented state method with fictitious noises is presented, by which the original system is transformed into a standard system without delays and with uncertain-variance fictitious white noises. According to the

In this work, we investigate the controllability results of a fractional integro-differential equation with non-instantaneous impulses on time scales. Banach contraction theorem and the non-linear functional analysis have been used to establish these results. In support, a numerical example with simulation for different time scales is given to validate the obtained analytical outcomes.

In our manuscript, we organize a group of sufficient conditions of approximate controllability for second order nonlocal neutral differential evolution inclusions. Next, we develop the result to analyze approximate controllability of impulsive systems. Lastly, a model is presented for illustration of theory.

This paper deals with the ship course tracking control problem in a novel inverse optimal control approach. The inverse optimal stabilization problem and inverse optimal gain assignment problem are firstly extended to general systems affine in the control with unknown control gain. It is shown that a sufficient condition to solve the inverse optimal control problem is the existence of a stabilization

The model under consideration in this paper describes a vibrating structure of an interfacial slip and consists of three coupled hyperbolic equations in one-dimensional bounded interval under mixed homogeneous Dirichlet–Neumann boundary conditions. The first two equations are related to Timoshenko-type systems and the third one is subject to the dynamics of the slip. The main problem we discuss here

In this paper, we establish the stability and controllability results for a Volterra integro-dynamic system with non-instantaneous impulses on time scales. Banach fixed point theorem has been used to establish these results. In the last section, a numerical example is given to illustrate the effectiveness of the analytic results.

In this paper, we establish a separation principle in the practical sense for a class of time-varying perturbed systems satisfying some relaxed condition. Under a restriction on the term of perturbation that is bounded by the sum of a Holder continuous function and a Lipschitz function, we propose a non-linear time-varying practical observer to estimate the system states, a practical state feedback

This paper addresses the boundary stabilization problem of a Timoshenko beam system with a tip mass under the external disturbance at the control end. Applying the idea of active disturbance rejection control, time-varying high-gain observers are designed to estimate the disturbances, and continuous anti-disturbances feedback controllers are developed. By choosing a suitable time-varying function,

A system of |$N$| Korteweg–de Vries equations coupled by the boundary conditions is considered in this paper. The configuration studied here is the one called star-shaped network, where the boundary inputs can act on a central node and on the |$N$| external nodes. In the literature, there is a recent result proving the exact controllability of this system by using |$(N+1)$| controls. We succeed to

In this paper, a novel model predictive control (MPC) strategy is proposed for a constrained and unconstrained linearized system. Contrary to conventional MPC algorithm, which uses only predicted information, this strategy uses both predicted data and past knowledge of the process to obtain control input. In fact, at each sampling instant, the combination of all elements of control sequence with weighting

In recently proposed stabilization techniques for parabolic equations, a crucial role is played by a suitable sequence of oblique projections in Hilbert spaces, onto the linear span of a suitable set of |$M$| actuators, and along the subspace orthogonal to the space spanned by ‘the’ first |$M$| eigenfunctions of the Laplacian operator. This new approach uses an explicit feedback law, which is stabilizing

This paper addresses the problem of solving a class of optimal control problems (OCPs) with infinite-dimensional linear state constraints involving Riesz-spectral operators. Each instance within this class has time/control-dependent polynomial Lagrangian cost and control constraints described by polynomials. We first perform a state-mode discretization of the Riesz-spectral operator. Then we approximate

Real-order generalization of dissipativeness and passivity concepts are presented in this paper. They are characterized as properties of a system; that is, they are independent of the system’s internal representation and independent of the type of fractional derivative defining that representation. With the aid of these extended concepts, the stability analysis of linearly interconnected multi-order

In this paper, we consider boundary feedback stabilization for an Orr–Sommerfeld equation cascaded by both the Squire equation and ordinary differential equations (ODE). In the system under consideration, there are two boundary control inputs subject to matched disturbance. By the active disturbance rejection control approach, two boundary disturbances are estimated by means of two disturbance estimators

In this paper, a framework for designing an event-based sliding mode controller is proposed to track a time-varying reference signal by a single-input, single-output non-linear system. In the proposed method, the control updates are fulfilled using the event-triggered method to decrease the number of control signal updates significantly. The system disturbance is tackled using an sliding mode control

This paper investigates the stabilization of nonlinear systems via event-based impulsive control. By using the Lyapunov–Krasovkii functional, related inequality techniques and combining with the linear matrix inequalities (LMI) approach, some sufficient conditions for the stabilization of nonlinear systems are established. Also, the method is applied to synchronize a class of Chua’s circuit systems

Many integrated electrical circuits and networks comprise of large RLC ladders. These complex circuits are described by high-order positive-real transfer functions. To simplify the design and analysis of these complex systems, model reduction techniques are used. It is of critical importance that the positive-real structure of the transfer function is retained in the reduction process. Moreover, it

The goal of this paper is to study feedback stabilization of infinite semi-linear parabolic systems evolving on a spatial domain |$\Omega $|⁠. We consider a decomposition of the state space via the spectral properties of the system. Then we will apply this approach to both strong and weak stabilization problem using bounded feedback. Applications are presented.

This paper presents a study on a family of second-order retarded semilinear control systems with non-local delay condition. The existence and uniqueness of mild solution has been deduced using the famous Banach contraction principle. An inclusion relation between the reachable set of semilinear control system and that of the associated linear system has been established. Finally, one example has been

In this article, we consider the differential equation |$\dot{v}\left (t\right )=-q\left (t\right )\beta \left (v\left (t\right )\right )+e\left (t\right )$| and derive sufficient conditions for the convergence of its solution(s) when |$t\rightarrow \infty $|⁠. As an application, we give generalized sufficient conditions for the global attractivity and the global asymptotic stability of a class of

We consider the equation |$\textrm{d}u(t)/\textrm{d}t=A(t)u(t)$| with an unbounded operator |$A(t)$| in a Hilbert space having a bounded strong derivative. We derive the exponential and |$L^2$| stability conditions. An illustrative example is presented.

This paper considers a discrete-time optimal scheduling problem for switched linear systems. In order to exactly find the global optimal solution, we study the relation between the linear dynamic system and the matrix trace. Then a new dynamical lower bound of the cost functional is constructed for all possible switching signals at each period. Compared with the current optimal value treated as an