基于时间冗余的一致空间法在故障检测及隔离中的应用

研究基于时间冗余的一致空间法在线性时不变系统故障检测及隔离中的应用Z 指出系统在某一时刻某个故障在一致空间中位于固定方向Z 通过选取最优转换矩阵, 将这一方向与其它因素在一致空间中所在方向相分离,提出一种故障隔离的方法Z 仿真实验表明, 在传感器、执行器和元件均可能发生故障并且系统存在未知输入的情况下可实现故障检测及隔离Z
关键词: 一致空间; 一致向量; 时间冗余; 故障检测; 故障隔离
Abstract: Fau lt detect ion and iso lat ion in linear t im e2invarian t system s is studied u sing the t im e redundancy based parity space app roaches. It is po in ted ou t that a given fau lt at a given t im e lies in the f ixed direct ion in the parity space. Them ethod fo r fau lt iso lat ion is p resen ted by separat ing th is f ixed direct ion f rom the direct ion s in the parity space of the o ther facto rs by u sing op t im al t ran sfo rm at ion m at rices. Sim u lat ion experim en t s show that fau lt s can be detected and iso lated w hen sen so rs, actuato rs and componen t sm ay all have fau lt s and that the system has unknow n in2 pu t s.
Key words: parity space; parity vecto r; t im e redundancy; fau lt detect ion; fau lt iso lat ion