By identifying the point on the Nyquist curve of the process in the frequency interval on which large modeling error may happen,we give an estimation of the modeling error.

• 通过辨识过程在特定频段上的响应信息估计建模误差的大小，并将其转化为模型参数摄动进行控制器参数的鲁棒稳定化设计。