系统故障检测与重构的修正偏差分离估计法

采用衰减记忆滤波器对ＦｒｉｅｄｌａｎｄＢ提出的偏差分离估计法进行了修正而成为修正偏差分离估计法，通过某型双转子涡轮喷气发动机控制系统传感器故障检测和重构的数值仿真例子表明，该方法不需要任何关于故障的先验知识而能可靠地检测出故障，精确地估计出故障大小并具有良好的重构性能，对故障估计的跟踪能力远比偏差分离法强。

A Method of Sensor Failure Detection and Reconstruction in Turbojet

In this paper, the method of sensor failure detection and system reconstruction is proposed by combining Fricdland's separated-bias estimation method[1] with attenuator filter and rcconstruction in the linear system. This method is very simple and the prior knowledge about failure is not necessary; it can detect failure reliablely and estimate accurately failure magnitude. After detection and estimation of failure, the system is reconstructed by fault-tolerant filter, and so the system's tolerant ability is raised. The authors apply this method to sensor failure detection and system reconstruction in the Chinese turbokt.