稳定裕度测试技术研究

针对模型未知或不确定的情况下确定系统的稳定裕度的问题,提出了利用实验方法获得系统的稳定裕度。对于MIMO系统,通过实验方法获得频响矩阵,应用回差矩阵最小奇异值法对稳定裕度进行估计,在实例中应用μ方法进行验证。目前很少有文献介绍利用飞行试验方法直接获取系统稳定裕度的方法,因此该文对于工程中系统稳定裕度的确定有着一定的意义。

Research on stability margin testing technology

In order to determine the stability margin of system under the condition that model is unknown or uncertain,an experimental method is proposed to get system stability margin. For MIMO system,the experimental method is adopted to obtain frequency response matrix,and the minimum singular value method of return difference matrix is used to estimate the stability margin. The u method is applied to verify the results in the instance. At present,there are few literatures to introduce the method that a flight test is performed to obtain the stability margin of a system directly,so the research has a certain significance for de-termining the stability margin of a system.