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The robust sliding mode control for Markov jump systems with parameter uncertainties and an unknown nonlinear function is discussed. Based on a descriptor system approach and linear matrix inequality (LMI), a sufficient condition which guarantees the existence of linear switching surface and the stochastic stability of sliding mode dynamics is given. A sliding mode controller is designed such that...
In this paper, the problem of Hinfin control for a class of Markov jump linear system (MJLS) with timevarying transition rates (TRs) is investigated. The time-varying character of TRs is considered as finite piecewise homogeneous and the variations of TR matrices in the finite set are considered as two types: arbitrary variation and stochastic variation. The latter means that the variations are subject...
This paper studies the global states regulation problem via output feedback for a class of uncertain nonlinear systems and a class of their cascade systems. The uncertain nonlinear perturbed terms of the considered systems are assumed to satisfy a generalized condition which is related to an unknown constant and is more relaxed than the existing triangular-type condition. Due to the presence of unknown...
This paper proposes a new control method for a weigh feeder. A weigh feeder has been widely employed in industry because it can dispense powder at a specified rate or amount. The proposed controller is mainly divided into a feed-forward and a feedback compensators. In order to obtain a simple controller, the former gives a steady-state control input designed using a nominal plant gain, and the latter...
This paper deals with the problem of modeling and control for the longitudinal motion of an air-breathing hypersonic vehicle (AHV). For a highly nonlinear, dynamically-coupled simulation model of an AHV, the corresponding linearized model is first formulated for the problem of control design. Then, by using a Lyapunov approach, the existence condition for the desired controller is presented for guaranteed...
This paper considers the path tracking problem for a class of underactuated autonomous underwater vehicles (AUVs), where only surge force and stern plane are available for vehicle's 3DOF diving motion. For these torpedo-type flying vehicles, the pitch moment is proportional to the vehicle's forward speed. Therefore, if vehicle takes slow motion, then we cannot fully excite the vehicle's pitch motion...
This paper deals with the problem of dissipative control for a class of Ito-type stochastic systems with time varying delays. We consider the design of a state-feedback dissipative controller based on Lyapunov-Krasovskii functional approach such that the closed-loop systems is exponentially stable in the mean square and strictly (Q, S,R)-dissipative. The sufficient conditions are obtained by using...
This paper investigates the problem of robust Hinfin control for Markovian jump systems with polytopic uncertain parameters and mode-dependent distributed delays. In terms of linear matrix inequalities, a sufficient condition for robust stochastic stability is proposed. A state feedback controller is designed such that the closed-loop system is stochastically stable and a prescribed Hinfin performance...
For uncertain time delay systems with mismatch disturbances, this paper presented an integral sliding mode control algorithm using output information only. The proposed control algorithm can improve the synthesis problem in past researches and avoid solving a large LMI. An integral sliding surface is comprised of output signals and an auxiliary full-order compensator. The designed output feedback...
Suppose an unknown or only partially identified plant is operating with a known linear controller in a closed-loop, and the use of a known nonlinear controller appears attractive to replace the existing controller, on the basis of limited knowledge of the plant. We apply our novel data-based verification tests for ensuring that the introduction of the new nonlinear controller will stabilize the true...
This paper is concerned with designing a fuzzy dynamic feedback controller for Takagi-Sugeno (T-S) model nonlinear stochastic systems with time delay. The slack matrix method is utilized to derive a delay-dependent sufficient condition that warrants the mean-square asymptotic stability with an Lscr2-Lscrinfin performance for the resulting closed-loop system. Moreover, the solvability condition for...
In this paper, the problems of passivity analysis and passive control of continuous-time Takagi-Sugeno (T-S) fuzzy time-varying delayed systems are studied. The analysis is based on the concept of very-strict passivity which is shown to be restrictive than the usual passivity. Novel techniques are applied to derive delay-dependent conditions for the solvability of the problem of designing a state-feedback...
In this paper, passive uncertainties are introduced and we deal with the robust dissipative control problem for a class of singular systems, and then provides the sufficient conditions to design the dissipative controller for uncertain singular systems, whose uncertainties are passive. Finally numerical example is provided to show the usefulness and the feasibility of the present approach.
The problem of robust Hinfin guaranteed control for the descriptor systems with time-delay and parameter uncertainty is considered. A sufficient condition for the existence of non-fragile Hinfin controller is presented in terms of linear matrix inequality such that the resulting closed-loop system is robustly stable and guarantees Hinfin performance index. It is proved that the condition also satisfies...
A nonlinear multivariable adaptive decoupling PID control strategy based on multiple models and neural network is proposed for a class of uncertain discrete time nonlinear dynamical systems. The adaptive decoupling PID controller is composed of a linear adaptive PID decoupling controller, a neural network nonlinear adaptive PID decoupling controller and a switch mechanism. The PID parameters of such...
A fuzzy robust adaptive control design scheme is developed for a class of nonlinear system represented by input-output models with unknown nonlinear function. The control gain of the nonlinear system is unknown. By on-line approximating the unknown nonlinear functions using two Mamdani fuzzy logic systems, the proposed approach does not require the unknown parts to satisfy the linear dependence condition...
In this paper, a control mechanism is proposed for state fault-tolerance of asynchronous sequential machines. A disturbance input may penetrate into the asynchronous machine and provoke unauthorized state transitions. The considered asynchronous machine is of input/output type, where access to the state of the machine is not available. The objective is to design output feedback controllers that automatically...
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