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The problems of stochastic stability and sliding mode Hinfin control for a class of nonlinear matched and mismatched uncertain systems with stochastic jumps are considered in this paper. The uncertain system under consideration may have mismatched norm bounded uncertainties in the state matrix. The transition of the jumping parameters in the systems is governed by a finite-state Markov process. A...
This paper presents a new method based on the algebraic Riccati equation for designing robust reliable Hinfin control laws for plants with structured uncertainty. The design method consists of incorporating information on the plant uncertainty into the algebraic Riccati equations(ARE) used for nominal Hinfin disturbance-rejection designs. The development of the reliable Hinfin controllers assumes...
This paper considers the problem of delay-dependent robust Hinfin control for switched systems with disturbance and time-varying structured uncertainties. Base on the Lyapunov function and Finslerpsilas lemma , we obtain the sufficient conditions which issure the switched systems are robust stabilization and has gamma robust performance under arbitrary switching laws. By Finslerpsilas lemma, some...
Observer-based robust Hinfin control for a class of Ito-type stochastic systems with parametric uncertainties is investigated in this paper. Observer-based controllers which guarantee the closed-loop augmented system robustly stochastically asymptotically stable in the mean square with prescribed Hinfin disturbance attenuation levels gamma for all admissible parametric uncertainties, are established...
In this paper, both indirect and direct adaptive fuzzy controllers with variable structure system (VSS) and Hinfin performance are proposed for a class of nonlinear time-delay systems with unknown dynamics nonlinearities and external disturbances. It is assumed that the unknown nonlinear function of state-delays is bounded by a high-order function with unknown gains. An adaptive fuzzy controller design...
This paper considers the fault detection problem for networked control systems (NCSs) with both network-induced delay and data dropout. By transforming the NCS into a state-delay system, we can obtain a time-independent fault detection filter for the NCS, directly utilizing the fault detection methods for state-delay system. An observer-based fault detection filter (FDF) is firstly proposed for residual...
A novel robust Hinfin decentralized intelligent control (RHDIC) strategy is proposed for the trajectory following problem of robot manipulators. The proposed system is comprised of a computed torque controller and neural robust controller with new learning algorithm. Based on Lyapunov stability theorem, it is shown that the proposed controller can guarantee stability of closed-loop systems and satisfactory...
A novel robust Hinfin intelligent control (RHIC) strategy is proposed for the trajectory following problem of robot manipulators. The proposed system is comprised of a computed torque controller and neural robust controller. Based on Lyapunov stability theorem, it is shown that the proposed controller can guarantee Hinfin tracking performance of robotic system, in the sense that all variables of the...
This paper is devoted to the problem of robust Hinfin control for a class of uncertain singular systems with time-varying delay and norm-bounded parameter uncertainties.The states of the singular system are unmeasured. A state feedback controller based on an observer is proposed. The observer system is singular and with the same dimension as that of the given singular system. By employing free-weighting...
The current and on-going research on small-scale autonomous helicopter flight control system (FCS) design is introduced, various control methodologies included classical control, robust multi-variable control( Hinfin loop shaping and structured singular value mu - synthesis), dynamic inversion and neural-based adaptive control are described and compared from a standpoint of engineering implementation,...
For a class of discrete-time switched systems with disturbances the problems of robust stability and disturbance attenuation under arbitrary switching are studied for this class of systems. The sufficient conditions for the systems to be robustly stable with Hinfin disturbance attenuation gamma are presented by using the multiple Lyapunov function technique and common Lyapunov function technique ...
The robust fault-detection filter design problem for linear stochastic systems with time delays and sensor nonlinearities is studied in this paper. Sufficient condition is derived in terms of linear matrix inequalities (LMIs), which guarantees the existence of a stable linear filter ensuring an stochastically asymptotically stability and a prescribed Hinfin disturbance-attenuation performance of the...
In this paper, the mathematical model of 3-DOF helicopter is established at first. Due to disturbance torque existing on the flight of 3-DOF helicopter, a robust Hinfin optimal tracking controller is analyzed and designed. The experimental results indicate that comparing with traditional LQR controller, the robust Hinfin optimal tracking controller can guarantee 3-DOF helicopter is not only better...
The method of H_/Hinfin optimization is used to detect the power sensor fault under the condition of using various speed wind turbine systems in this paper. This method takes into account the robustness of the fault detection observer against disturbances and sensitivity to faults simultaneously. First in this paper, a physical model of the fundamental drive-system dynamics of a 400 kW horizontal...
This paper investigates robust and non-fragile Hinfin controller design for the affine fuzzy large-scale systems, which are composed of a number of T-S affine fuzzy subsystems with interconnections. According to the Lyapunov direct method and the decentralized control theory of large-scale systems, a sufficient condition in the form of LMIs which guarantees the existence of state feedback Hinfin control...
The design of robust Hinfin controller for a class of uncertain neutral systems with varying state delay and input control delay is considered. The uncertainties are norm-bounded and the states of the uncertain neutral systems are available. Combining the linear matrix inequality with Lyapunov functions by proper assumption, the existent conditions of quadratic stabilization and Hinfin state feedback...
Robust Hinfin control of the uncertain networked control systems is studied in this paper, and these systems have a general framework, which is uncertainty, delay, packet loss, disturbance, etc. Network-induced delays are modeled as Markov chains, dropout compensator between sensor and controller is presented and systems communicate data and signals via output feedback with state observer. Based on...
This paper investigates the problem of robust Hinfin state-feedback control for a class of discrete-time singular T-S fuzzy systems with norm-bounded parameter uncertainties. By taking into account the relationships between the slow and fast subsystems of a discrete-time singular T-S fuzzy system, a bounded real lemma is firstly derived, which is shown to be sufficient and necessary. Based on this,...
The problem of robust decentralized reliable Hinfin control is investigated for nonlinear uncertain interconnected systems with state time-varying delays. By conducting proper Lyapunov universal function, we present a group of linear matrix inequality(lIMs) which have the solution as sufficient conditions to stabilize the closed-loop system asymptotically and have the Hinfin property, giving the condition...
This paper considers a robust decentralized Hinfin control problem for uncertain multi-channel discrete-time systems with time-delay. The uncertainties are assumed to be time-invariant, norm-bounded, and exist in the system, time-delay and output matrices. Our interest is focused on dynamic output feedback. A sufficient condition for the multi-channel uncertain discrete time-delay system to be robustly...
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