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首页> 外文期刊>International Journal of Applied Mathematics and Computer Science >A FAULT ESTIMATION AND FAULT-TOLERANT CONTROL BASED SLIDING MODE OBSERVER FOR LPV DESCRIPTOR SYSTEMS WITH TIME DELAY
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A FAULT ESTIMATION AND FAULT-TOLERANT CONTROL BASED SLIDING MODE OBSERVER FOR LPV DESCRIPTOR SYSTEMS WITH TIME DELAY

机译:基于故障估计和基于容错控制的LPV描述符系统与时间延迟的基于滑动模式观察

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摘要

This paper considers the problem of fault-tolerant control (FTC) and fault reconstruction of actuator faults for linear parameter varying (LPV) descriptor systems with time delay. A polytopic sliding mode observer (PSMO) is synthesized to achieve simultaneous reconstruction of LPV polytopic descriptor system states and actuator faults. Exploiting the reconstructed actuator faults and state estimates, a fault-tolerant controller is designed to compensate the impact of actuator faults on system performance by stabilizing the closed-loop LPV delayed descriptor system. Besides, the controller and PSMO gains are obtained throughout the resolution of linear matrix inequalities (LMIs) using convex optimization techniques. The developed PSMO could force the output estimation error to converge to zero in a finite time when the actuators faults are bounded through the reinjection of the output estimation error via a nonlinear switching term. Simulation results applied to a given numerical system are presented to highlight the superiority and effectiveness of the proposed approach.
机译:本文考虑了具有时间延迟的线性参数变化(LPV)描述符系统的容错控制(FTC)和故障重建的故障重建问题。合成多粒状滑动模式观察者(PSMO),以实现LPV多粒子描述符系统状态和执行器故障的同时重建。利用重建的执行器故障和状态估计,旨在通过稳定闭环LPV延迟描述符系统来补偿执行器故障对系统性能的影响。此外,使用凸优化技术在整个线性矩阵不等式(LMI)的整个分辨率中获得控制器和PSMO增益。开发的PSMO可以强制输出估计误差在通过非线性切换术语通过再注于输出估计误差时界定的有限时间,以便在有限的时间内收敛到零。提出了应用于给定数值系统的仿真结果以突出所提出的方法的优越性和有效性。

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