While in the practical application, most systems have uncertain parameters and uncertain perturbation from the outside, and if we still use the traditional methods, it will make the identification abortive.

• 然而实际应用中系统大多存在参数不确定性和外界不确定干扰，如果还是采用传统的识别方法，就会导致识别失败，因此要寻求能够处理系统不确定时的鲁棒识别方法。