一种非线性系统容错控制的混合方法

针对连续搅拌箱式反映器,提出一种闭环非线性系统容错控制的混合方法。即利用“等价偏差”的新概念建立传感器的故障模型,然后基于一种伪偏差分离估计算法,在线得到系统状态和“等价偏差”的估计值。数值仿真结果验证了该方法不仅具有很强的关于传感器故障的容错能力,而且还可检测、分离和估计出相应的故障。

Fault Tolerant Control of Nonlinear System: A Unified Approach

This paper presents a unified fault tolerant control approach for nonlinear systems based on a continuous stirred tank reactor (CSTR). A new concept of "equivalent bias" is preposed to model the sensor faults. Both the states and the "equivalent bias" are on -line estimated by a pseudo separate -bias estimation algorithm. Computer simulation results show that the proposed approach has strong fault tolerant ability a-gainst sensor faults, moreover the sensor faults can be on -line detected, isolated and estimated also.