The transfer function was derived from the matrix function of axialy moving strings. Then the inverse Laplace transform, with the residue theorem, was employed to calculate the time domain response from the frequency domain response. 由轴向运动弦线的矩阵函数计算得到系统的传递函数,然后用留数定理计算传递函数的Laplace逆变换,这样就可以得到时域响应。
( CONCLUSIONS) The new derived inverse S model can represent the principle of the dynamic frequency response perfectly, and the ISF based on it can be used for the endpoint determination in piezoelectric coagulation. 结论该反S模型可以较理想地反映凝血反应中压电频率动态变化规律,ISF法可以理想的判断压电凝血终点。
By using inverse matrix of frequency response function in this paper, the spectrum of dynamic forces acting on the set has been identified. 本文采用频响函数矩阵求逆法,辨识了立式机组动态力的幅值谱。
Improved Algorithm of Inverse Matrix of Frequency Response Function in Multi-load Identification 多载荷识别频响函数矩阵求逆法的改进算法
With Laplace transformation and inverse Laplace transformation, analytical solutions of time domain response and frequency domain response of single degrees-of-freedom are obtained. 用Laplace变换及其反变换,解析地计算了解耦后单自由度系统的时域和频域响应。
For random load identification error near the natural frequency, combined with inverse pseudo excitation method of load identification, the causes of the errors is deeply studied, and method of conditions of frequency response function is proposed to select the measurement points. 针对随机载荷识别出现的固有频率附近误差大等问题,结合逆虚拟激励法对载荷识别出现的误差的原因进行了详细深入的分析,提出用频响函数的条件数来选择测点组合的方法。