大大提高故障检测准确率和拓宽了故障检测范围。
It improves accuracy of fault diagnosis and broadens the field of diagnosis.
仿真算例结果表明，在故障发生时，优化观测器可以很灵敏地检测出故障，并能将未知扰动对残差的影响有效地抑制在给定的范围内。
Simulation results demonstrate that the proposed observer can detect the faults sensitively, and the influence of unknown disturbance on residual error can be restrained to a given range.
相对于数字电路，模拟电路的信号动态范围宽、波形变化大，因此对其的故障检测一直是研究的重点。
Comparing with the digital circuit, analog circuit signal has a wide dynamic range and varied waveform changes, Therefore, they fault detection has been the focus studied.
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