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本文研究了具有结构扰动的系统的鲁棒性，根据系统频域的临界条件以及扰动系统的结构信息，给出了一个判定系统稳定的充分必要条件，并利用此结果提出了一种确定系统鲁棒稳定上界的方法，与现有的方法相比，本文方法可得保守性小的鲁棒稳定上界。
In this paper, the robustness of the system with structural perturbations is studied. According to the critical condition in the frequency domain and the structural information of the perturbed system, a sufficient and necessary condition for the stability of the system is given. Based on the results, Compared with the existing methods, the proposed method yields a conservative and robust robust upper bound.