不确定时滞线性系统的鲁棒容错控制

Robust Fault-Tolerant Control of Uncertain Linear Systems With Time- Delay

容错控制就是使设计的控制系统能对可能发生的故障具有一定的容错能力。该问题直接关系到控制系统运行的可靠性和安全性。完整性是容错控制研究的一个重要方面 ,它是指系统中一个或多个部件发生故障时系统并不进行重构 ,而是利用余下的部件仍可使系统稳定并保持规定性能。由于参数扰动的广泛存在性以及执行器和传感器发生故障的不可避免性 ,使得研究具有参数不确定的时滞系统的鲁棒容错控制问题具有更重要的现实意义。针对传感器故障情况 ,采用带有滞后的状态反馈控制 ,首先考虑了线性时滞系统的容错控制问题 ,给出了线性时滞系统对传感器失效具有完整性的一个充分条件 ,进而考虑了具有参数扰动的线性时滞系统的鲁棒容错控制问题 ,给出了鲁棒容错控制时滞系统的设计方法和步骤 。

Fault-tolerant control is to make the designed control system have certain endurance to the failures happened potentially. This problem is directly relative to the reliability and safety of the control system. Integrity is one of the important aspects of fault-tolerant researches and it means that when one or more parts fail the system does not need to be reconstructed but make full use of the remained parts to keep the system stable and the prescriptive performance. Because of the universal existence of parameter perturbation and the fault ineluctability for actuator and sensor, it is more important and practical to study robust fault-tolerant control of parameter perturbation for linear system with time-delay. From the sensor failure adopting state feedback control with time-delay ,by considering the fault-tolerant control for linear system with time-delay, a sufficient condition of time-delay linear system possessing integrity against sensor failure was given. Robust fault-tolerant control for parameter perturbation linear system with time-delay was discussed and design method was given. An illustrative example and simulation results were given to demonstrate the effectiveness of the proposed design method.