THPFSY-2型双容水箱液位实验系统鲁棒故障诊断

摘要

The robust fault diagnosis of THPFSY-2double-tank under disturbance and fault was studied in this paper.According to the physical model of the double-tank system,a T-S fuzzy model of the system was established by local linear method.Then by introducing a reference model,a generalized residual error equation was established.At the same time,the problem of fault diagnosis was converted into a typical system robust control problem.Linear matrix inequalities (LMI) conditions for the optical solutions weregiven according to the bounded real lemma (BRL).Finally,effectiveness ofthe proposed algorithm was verified by Matlab simulation.%研究了THPFSY-2型双容水箱在干扰和故障作用下的鲁棒故障诊断问题.首先根据双容水箱机理模型建立双容水箱的T-S模糊模型,然后通过引入参考模型,建立有关故障残差估计误差的广义残差方程,将基于T-S模型的故障诊断滤波器设计问题转换成了典型的系统鲁棒控制问题.根据有界实引理给出了参数最优解的线性矩阵不等式解的形式,并对其正确性进行了证明.通过仿真验证了该算法在双容水箱故障诊断中的有效性.