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为求得稳定、低阶、高精度的围护结构动态负荷合成传递函数模型 ,提出了基于系统辨识理论的传递函数模型合成方法 ,通过对有限个传递函数叠加成的线性系统进行最小二乘法辨识 ,获得该系统的等价传递函数模型。对 6个 1 0阶以上的传递函数进行合成 ,得到 5阶的合成传递函数 ,并采用阶跃扰量和正弦波扰量检验其稳定性和精度 ,效果良好
In order to obtain a stable, low-order and high-precision synthetic transfer function model for the dynamic load of the envelope, a synthesis method of the transfer function model based on the system identification theory is proposed. The linear system with a finite number of transfer functions is identified by the least square method , Get the equivalent transfer function model of the system. The synthesis function of the six transfer functions above 10th order is obtained, and the synthetic transfer function of the fifth order is obtained. The stability and accuracy of the fifth order synthetic transfer function are verified by the use of the step disturbance and the sinusoidal disturbance.