研究基于時間冗余的一致空間法在線性時不變系統故障檢測及隔離中的應用Z 指出系統在某一時刻某個故障在一致空間中位于固定方向Z 通過選取最優轉換矩陣, 將這一方向與其它因素在一致空間中所在方向相分離,提出一種故障隔離的方法Z 仿真實驗表明, 在傳感器、執行器和元件均可能發生故障并且系統存在未知輸入的情況下可實現故障檢測及隔離Z
關鍵詞: 一致空間; 一致向量; 時間冗余; 故障檢測; 故障隔離
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