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The problem of guaranteed cost robust Hinf reliable control is investigated for time-varying delay uncertain systems against actuator failures. In the considered system, the time-varying delay and its derivative are bounded. Actuators are classified into two sets (One set is susceptible to failure and the other set is not susceptible to failure). All the outputs of the failure actuators are assumed...
This study is motivated by the onboard fault detection of gas turbine engines (GTEs), where the computation resources are limited and the disturbance is assumed to be band-limited. A fast Fourier transformation (FFT)-based disturbance frequency estimation approach is proposed and performance indexes are improved by integrating such frequency information. Furthermore, in the left eigenvector assignment,...
With the fast development of digital computers, more industrial processes are controlled by digital processors and there is an increasing demand for improving the system reliabilities. The robustness in model-based fault detection has received a lot of attention during the last two decades, and RFDO (robust fault detection observer) forms an important branch of fault detection. However, most of current...
In this paper, we study the best achievable performance of a nonlinear system under disturbance in an output regulation problem. The nonlinear system is a stabilizable nonminimum phase system and its zero dynamics consists of an input-to-state stable component and an unstable but stabilizable component. It is assumed that a disturbance signal appears in the input-to-state stable component of the zero...
In this paper, a new indirect adaptive fault-tolerant controller design methods dynamic output feedback is presented to tolerate actuator faults for linear time-invariant systems. Based on the on-line estimation of eventual faults, the adaptive fault-tolerant controller parameters are updating automatically to compensate the fault effect on system. A notion of adaptive H∞ performance index is proposed...
This paper is concerned with the adaptive reliable H∞ filtering problem against sensor failures for continuous-time linear systems. An adaptive H∞ performance index is defined to describe the disturbance attenuation performance of systems with time-varying parameter estimations. By combining the linear matrix inequality (LMI) approach for H∞ filter design and adaptive method, a method of designing...
This paper studies the problem of adaptive fault-tolerant Hinfin controller design for linear time-invariant systems. New indirect adaptive fault-tolerant controller design methods via state feedback are presented for actuator fault compensations. Based on the on-line estimation of eventual faults, the adaptive fault-tolerant controller parameters are updated automatically to compensate the fault...
In the paper the problem of disturbance attenuation performance in single-loop control system is investigated. Modified MV control strategy with bounded control variance is used as benchmark for both LQG and classically and optimally tuned PID-type controllers. Certain time and frequency domain functions are then examined to further assess the control performance in terms of robustness. It has been...
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