容错控制系统中状态完全可观冗余度的研究
A Study of the Degree of Observable Redundancy in Fault-Tolerant Control System
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摘要: 本文提出了状态完全可观冗余度的概念.以线性时不变系统为研究对象,采用数值秩计 算理论,编制了计算机辅助计算状态完全可观冗余度的程序.在依靠数学模型实现的容错控 制系统中,只要选取可保证状态完全可观冗余度为1的量测信号,就能在任一测量传感器失效 的情况下,重组状态反馈控制律,以实现容错控制.Abstract: In this paper, a concept of the degree of observable redundancy is proposed. The degree of the observable redundancy for the linear time-invariant systems is determined by compuling the rank of the matrices. It is shown that for the model based fault-tolerant control systems, if the measured signals possess the degree of observable redunancy of 1, the state feed-back control law can be reconstructed in the case of any single sensor fails and fault-tolerant control can be reserved.
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Key words:
- Observability /
- sensor failure /
- numerical rank
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