一种变时滞不确定系统鲁棒可靠控制的线性矩阵不等式方法

为提高动态系统的可靠性,研究了带有执行器故障的变时滞不确定系统的鲁棒可靠控制.给出了系统在正常运行和带有可预期执行器故障情况下,闭环系统保持二次稳定的时滞依赖充分条件.运用线性矩阵不等式方法实现了可靠状态反馈控制的综合问题.通过仿真算例,说明了本文方法的可行性和有效性.     

一类时滞不确定系统传感器与执行器同时失效的容错控制设计

研究线性状态时滞不确定系统传感器和执行器同时失效的容错控制问题。在Lyapunov稳定性分析的基础上,利用H∞控制设计方法和线性矩阵不等式处理方法,给出了带有时滞的状态反馈控制的设计方案。采用该方案设计的容错控制系统能够在保证系统闭环稳定的同时满足给定的H∞性能指标,而且能够减小时滞所带来的影响。通过仿真算例验证了该方法的有效性。     

A Sliding Mode Control for Uncertain Time-delay Systems

By means of the feasibility of some linear matrix inequalities （LMIs）, delay dependent sufficient condition is derived for the existence of a linear sliding surface, which guarantees quadratic stability of the reduced-order equivalent system restricted to the sliding surface. And a reaching motion controller is proposed. A numerical simulation shows the effectiveness of the approach.     

基于广义内模控制的时滞系统主动容错控制设计

为了提高动态系统的可靠性,研究了多状态时滞系统的主动容错控制.给出了基于广义内模控制设计的容错控制器设计方法.该容错控制器由两部分构成,分别针对系统的性能和鲁棒性.只有当系统发生故障时,控制器中针对鲁棒性(容错性)的部分才会起作用,从而保证系统在没有故障时具有尽量好的性能,而当故障发生后具有客错功能.通过一个仿真算例,验证了方法的有效性.     

Progressive Fault Accommodation for Time-delay Systems with Parametric Faults

The fault accommodation problem for time-delay system is studied in this paper. The progressive accommodation strategy based on the Newton-Raphson scheme is proposed to solve this problem. This accommodation scheme can significantly reduces the loss of performance and risk associated with system instability which results from the time-delay needed by fault accommodation algorithms to provide a solution. Simulation results are given to illustrate the efficiency of the provided method.