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How to design an optimal mixed H2/H∞ robust FID controller for a complex control system is of great practical importance, but it is still an open issue. From the perspective of evolutionary algorithm, this paper formulates this issue firstly as a typical constrained optimization problem by minimizing a weighted objective function consisting of the robust stability performance, disturbance attenuation...
Water supply system has characteristics of non-linear, time-varying parameter, large time delay, so its mathematical model changes time by time. Water supply system widely use PID controller to keep constant pressure and PID controller need accurate mathematical model. The system that use PID controller is along with large overshoot, more adjusting time. Fuzzy controller don't need the accurate mathematical...
The robust stabilization problem of a 3-degree of freedom helicopter using continuous sliding-mode controllers is addressed in this paper. The sliding output is designed for relative degree equal to one and two, and the desired sliding-mode dynamics using the generalized formula by Ackermann and Utkin. To have available the complete state, a higher-order sliding-mode differentiator is also implemented...
The article presents a use case evaluation of the robustness of a physical protection system for the Vodňany water tank, designated as a national critical infrastructure element. The evaluation will be performed based on three probable attack scenarios; the aim of these would be poisoning the drinking water source and intoxication of the population of the nearby city or destruction of the water tank...
This work presents a path following controller for single Unmanned Surface Vessels (USV) in formation control. Firstly, the USV mathematical model under unknown dynamic sea conditions will be analyzed. And then an adaptive robust controller is designed based on RBF neural network. Finally, the controller stability and robustness with unmodeled dynamics and unknown model parameters perturbation in...
With the aid of double-controller design concept and particle swarm optimization (PSO) algorithm, an internal model control (IMC) scheme with two-degree-of-freedom (TDF-IMC) based on PSO algorithm (PSO-TDF-IMC) is proposed, which is capable of controlling large time-delay processes. This method takes integral time absolute error (ITAE) index as objective function and uses PSO algorithm to optimize...
In this paper the calculations of the robustness of a network is addressed. After a brief description of the most relevant metrics, our Network Robustness Simulator(NRS) is presented as well as its structure and working model. The NRS computes the robustness I a dynamic scenario, it copes with multiple failures and different types of attack. In particular, the addition of the epidemic based model...
Model predictive control is a kind of control method based on parameter model. However, in the actual system, the parameters of the motor may deviate from the parameters in the model due to the influence of various objective factors, leading to deterioration of the control performance. In this paper, a strong parameters robustness model predictive current control (MPCC) method for permanent-magnet...
Coordinated mobility of people, goods, and energy is a foremost concern of infrastructure development. For example, deployment of advanced chargers and the associated communications networks will enable electric-vehicle fleets to serve particular needs of the power grid and microgrids. Incorporating plug-in electric vehicles as agents of energy storage in the grid can provide services to ancillary...
Recently, the major challenge in the robustness evaluation of networks is to enhance the detecting the most critical nodes. Many researchers have studied the problem of detecting the list of attacked nodes, which are the number of failed nodes is maximum, in order to protect these nodes. However, there is no any previous works to consider the cost of attacks that the budget is limited is very practical...
This paper develops a hierarchical sliding-mode controller (HSMC) to simultaneously accomplish velocity control and balancing control for a two-wheeled self-balancing vehicle (TWSBV). Based on the derived TWSBV model, two first-level sliding surfaces, relevant to velocity and position of TWSBV and tilt angle and tilt angular velocity of TWSBV respectively, and a second-level sliding surface, are defined...
We propose bias-compensated algorithms based on the RZA-LMS algorithm and diffusion RZA-LMS algorithm. Our proposed algorithms improve the accuracy of estimation under the situation that input of the adaptive filter contains noise. Estimation methods of the input noise' variance are given for implementing our single-node and diffusion bias-compensated algorithms. Simulation results show that the proposed...
Shell structure can help us understand the transport properties of the network clearly, and also identify the influential spreaders in complex networks. The robustness of networks suffering shell attacks is a topic of great interest since it is an important issue affecting many real-world networks. We study the robustness of two coupled network systems under shell attack, where multiple support-dependence...
This paper investigates the missile attitude control problem. The model used in this paper is with respect to the Euler attitude angles and their derivatives which can be measured and computed easily. A robust practical finite-time control algorithm is proposed based on the terminal sliding mode approach. It is proved that all of the signals in the closed-loop system are bounded and the tracking error...
This paper is concerned with power and rate control for wireless communication networks with nonlinear channel fading. A new mathematical model of power and rate control system is derived, and a robust power and rate controller is designed based on sliding mode control. A sufficient condition for the existence of stable sliding surfaces is established via linear matrix inequality, and the controller...
In this paper, a robust control method is proposed for a class of fractional-order nonlinear system with unknown system parameter based on Lyapunov direct method. The Caputo definition is used to describe the fractional-order dynamic system. The controller is simple and enables asymptotically stability to be achieved without the computation of the conditional Lyapunov exponents. Finally, simulation...
This study presents a decoupled sliding mode controller for an inverted pendulum on a cart. The sliding mode control is a special type of variable structure control and it is applicable to the systems represented in the canonical form. For the systems which are not represented by the canonical form such as the inverted pendulum, the decoupled form of the sliding mode controller can be used. In this...
This paper deals with the problem of robust output regulation for a set of Quad-Rotors forming a geometric pattern. The proposed control strategy is based on sliding- modes techniques, and it is able to robustly regulate the corresponding Quad-Rotors positions and angles in the presence of some class of disturbances acting on the Quad-Rotors. The proposed regulation is composed by cascaded continuous...
This paper presents the design and implementation of a position controller for a rotary platform driven by a DC motor through state feedback. The main objective in this development is to make an electromechanical system and position control for a rotary platform using a 12 volts DC motor with quadrature encoder. The design and development stages were executed using computational tools such as Matlab...
The purpose of this paper is to quantify the effect of design parameters on the bullwhip effect and dynamic responses produced by a multi-echelon supply chain with different information-sharing strategies. An effective and efficient supply chain strategy should be capable of reducing costs and enhancing customer service level, and should be capable of enhancing the robustness of the supply chain....
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