研究基于時(shí)間冗余的一致空間法在線性時(shí)不變系統(tǒng)故障檢測(cè)及隔離中的應(yīng)用Z 指出系統(tǒng)在某一時(shí)刻某個(gè)故障在一致空間中位于固定方向Z 通過選取最優(yōu)轉(zhuǎn)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(shí)驗(yàn)表明, 在傳感器、執(zhí)行器和元件均可能發(fā)生故障并且系統(tǒng)存在未知輸入的情況下可實(shí)現(xiàn)故障檢測(cè)及隔離Z
關(guān)鍵詞: 一致空間; 一致向量; 時(shí)間冗余; 故障檢測(cè); 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