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

中文关键词  容错控制系统  在线选择策略  H∞控制  Markov故障模型

英文关键词  fault-tolerant control system  online selection scheme  H∞ control  Markov fault model

中文摘要

      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.

英文摘要

      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.