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This paper considers the problem of global output feedback stabilization by virtue of a reduced-order observer for a class of switched nonlinear systems with time-varying control gains under arbitrary switching. Firstly, a set of coordinate transformations is used to introduce a scaling gain. Then, state feedback controllers are designed for the individual subsystems of transformed switched system,...
An adaptive fault-tolerant control strategy is proposed for a class of switched nonlinear systems with unknown functions and unavailable states by using the improved average dwell time technique and backstepping method. We use radial basis function neural networks (RBFNNs) to approximate the unknown functions and a switched nonlinear state observer is designed to estimate the unavailable states. In...
A solution of an intelligent hybrid control for a class of complex nonlinear uncertainty plants via switched T-S fuzzy-system models possessing time delays and uncertainties is developed. The intelligent, fuzzy-system based, robust, output feedback control for this class of switched systems is investigated and solved by using the common and the multiple Lyapunov functions approaches as appropriate...
Positive observer design of interval switched positive systems is considered in this paper. The multiple quadratic co-positive Lyapunov functions technique and the method of augmented systems are adopted. The sufficient conditions of insuring stabilization of augmented systems are obtained under the state-dependent and time-dependent switching law, respectively. In the end, a numerical example is...
This paper investigates the problem of adaptive fuzzy output-feedback control for a class of switched uncertain nonlinear systems without the measurements of the system states. By utilizing fuzzy logic systems to approximate unknown nonlinear functions, a novel adaptive fuzzy control technique for the problem studied is set up by exploiting the average dwell time method and backstepping. A switched...
This paper deals with the issues of observer-based reliable stabilization and Hinfin control for a class of continuous-time switched Lipschitz nonlinear systems in the sense that actuators suffer a ldquodestabilizing failurerdquo. When the never-faulty actuators cannot stabilize the corresponding system, the closed-loop switched systems can still be exponentially stable based on the average dwell...
Observer based tracking control for switched linear systems with time-delay is investigated in this paper. Sufficient condition for the solvability of the tracking control problem is given for the case that the state of system is not available. The design of a switching control law based on measured output instead of the state information is considered. Lyapunov-Krasovskii functional method is utilized...
In this paper, a global robust stabilizer for a class of uncertain non-minimum-phase nonlinear systems in generalized output feedback canonical form is designed. The system contains unknown parameters multiplied by output-dependent nonlinearities and output-dependent nonlinearities enter such a system both additively and multiplicatively. The proposed method relies on a novel parameter estimator and...
In this paper, a new global adaptive output feedback dynamic compensator is proposed for tracking of a class of systems that are globally diffeomorphic into systems in generalized output feedback canonical form. Output-dependent nonlinearities are allowed to enter in both cases as additive and multiplicative. The system is allowed to contain unknown parameters multiplying output-dependent nonlinearities...
This paper addresses the problem of robust Hinfin observer design for a class of linear time-delay systems. Suppose that there exist finite candidate observers in a given set of observers, none of which is a robust Hinfin state observer, and the gain matrices of state observers are all given or all unknown. This paper designs a switching law between observers such that the error system is stabilizable...
A robust H/sub /spl infin// hybrid state observer design method for a class of nonlinear systems is put forward. Suppose that there exist finite candidate observers in a given set of observers, and none of the individual observers is robust H/sub /spl infin// observer which makes the error system of nonlinear system stabilizable with H/sub /spl infin// disturbance attenuation. The problem is to design...
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