线性系统传感器故障的区间估计

This paper studies the problem of sensor fault interval estimation for discrete-time linear systems.First, the original system is transformed into an equivalent descriptor system by considering the sensor fault as augmented state.Second, the robust augmented state observer is designed by using the H∞technique to estimate the sensor fault.The proposed method uses the zonotpoes to realize the interval estimation of the fault.Compared with the existing methods, the proposed method has more relaxed design conditions and can obtain more accurate fault interval estimation.Finally, numerical simulations of a quadruple-tanks system are given to illustrate the effectiveness and superiority of the proposed approach.