Studies on fault tolerant control of dynamical systems

Abstract

This thesis reports the studies on fault-tolerant control of various newlinetypes of dynamical systems. Several sufficient conditions are used for the newlinestability and stabilization of the considered dynamical systems. Furthermore, newlinethis study involves robust dissipative sample-data problem for a class of newlineuncertain nonlinear systems in the presence of nonlinear fault has been newlinestudied. Specifically, Hand#8734; and passivity controls are discussed from the newlineproposed dissipative control results. Next, extended dissipativity-based newlinenon-fragile control has been proposed for flight control systems with randomly newlineoccurring uncertainties and actuator faults. Also the reliable non-fragile newlinecontrol has been discussed. Based on the Takagi-Sugeno fuzzy model newlineapproach, finite-time extended passive, reliable filter has been developed for newlinea class of continuous-time systems via time-varying delay. Moreover, the newlinestochastic variable satisfying the Bernoulli random distribution are introduced newlineto characterize the phenomenon of the randomly occurring uncertainties and newlinemissing measurements. Next, robust finite-time non-fragile sampled-data newlinecontrol is investigated for an uncertain flexible spacecraft model with stochastic newlineactuator. Finally, stabilization of interval type 2 fuzzy systems with time-varying newlinedelay, nonlinear actuator fault and external disturbances has been examined. All newlinethe above mentioned results are obtained by using Lyapunov stability theory, newlineintegral inequalities such as Jensens integral inequality,Wirtinger-based integral newlineinequalities and linear matrix inequality techniques. Numerical examples with newlinesimulation results are provided in each chapter to show the efficiency and newlineapplicability of the proposed control design techniques. newline newline