The unknown input observers are very important for singular systems.
未知输入观测器问题对广义系统具有特别重要的意义。
Based on the unknown input observers and the concept of equivalent control, this paper considers the problem of robust fault diagnosis of sensor faults in a class of nonlinear systems.
基于未知输入观测器设计和等价控制的概念，讨论了一类非线性系统传感器故障的鲁棒故障诊断问题。
The proposed causal observers can determine the existence and the place of unknown input faults. Therefore the present fault diagnosis approach has potentials in practical applications.
本文所讨论的观测器可以检测出未知输入故障的存在和位置，这一特点使得这种观测器在实际应用中有广阔的前景。
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