H_∞容错控制器设计及其在线优化选择容错控制

Active H_∞ fault-tolerant control design and online optimal selection schemes of fault-tolerant controllers

本文设计了主动H∞容错控制器及其在线优化选择的多种容错控制策略,并且构造了"离线设计在线选择"容错控制模式下故障模式与容错控制器的多对多映射关系.首先,提出了针对给定故障模型的H∞容错控制器设计方法,离线设计了可恢复故障模式的容错控制器;其次,根据不同的需求,设计了3种方法缩小故障模式与容错控制器的所有可容错映射关系;然后,提出了4种主动容错控制器在线优化选择策略来满足不同的优化需求,提高容错控制性能;最后,仿真验证了所提出的主动H∞容错控制器及在线优化选择策略的有效性.

This paper proposes an active H∞ fault-tolerant control and optimal schemes for selecting a controller online,and constructs many-to-many mappings between fault modes and controllers under the ＂off-line design,online selection＂ fault-tolerant structure.According to the specific fault model,the active H∞ fault-tolerant control is designed off-line for every recoverable fault mode.Then,three methods are presented to shrink all fault-tolerant mappings between fault modes and fault-tolerant controllers for different requirements.As a result,four selection schemes are proposed to choose a proper controller from a given set of controllers for a given fault mode.These four selections are designed for different requirements to improve the fault-tolerant performances of systems.Finally,a simulation is performed to illustrate and validate the effectiveness of the active H∞ fault-tolerant controllers and the selection schemes.