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In this paper, a new active FTC strategy is proposed. First, it is developed in the context of linear systems and then it is extended to Takagi-Sugeno fuzzy systems. The key contribution of the proposed approach is an integrated FTC design procedure of the fault identification and fault-tolerant control schemes. Fault identification is based on the use of an observer. While, the FTC controller is...
This paper presents a direct adaptive fuzzy control scheme for a class of uncertain single-input single-output nonlinear systems subject to input amplitude and rate saturation constraints. The fuzzy controller is designed to mimic an ideal controller which is assumed guarantying the control objective. The free parameters of the fuzzy controller are adjusted by an adaptive law which prevents the presence...
This paper models a class of stochastic systems with faults by the switching diffusion processes (SDP), and analyzes the fault tolerability of such stochastic systems in the sense of input-to-state stability (ISS) of overall SDP. A series of sufficient conditions are established to guarantee the ISS of the stochastic systems in spite of faults in three cases respectively: All individual modes of SDP...
This paper deals with modeling and design of reliable controller for a new type diaphragm pump. Because of parameter uncertainties and nonlinear dynamics of the pump model, a fuzzy-like PID controller is designed. The controller design is based on fuzzy Lyapunov synthesis and stability and the robustness analysis of the designed system are straightforward. The pump control system is driven by a digital...
In this paper, we propose a periodic observer design for a class of non-linear models in the discrete Takagi-Sugeno form with periodic parameters. The adopted framework is based on the Lyapunov theory and uses the linear matrix inequality (LMI) formalism. Only the stability of the estimation error is considered. The main goal is to reduce the conservatism of the stabilization conditions using some...
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