一种基于阶跃响应的理想频率信号源及频域分析的研究

摘要

为解决以阶跃信号为激励的阶跃时域响应法难以掌握分析对象本质特性的问题,深入分析了阶跃信号的频谱特性,指明阶跃实质上是一种频率响应法的理想频率信号激励源,首次提出了阶跃响应不仅可用于时域分析,而且能充当回路频域分析的数据源,并设计采用了点频滤波器将阶跃响应用于回路频域分析.仿真试验和实际应用结果验证了文中提出的基于阶跃响应频域分析方法的正确性和有效性.%To overcome the deficiency of time-domain response analysis, and by analyzing the frequency spectrum characteristics of step signals, it is pointed out that the step signal can be taken as an ideal fre quency excitation signal source, and the step response analysis is firstly believed applicable not only in time domain, but also in frequency domain. A single-frequency-pass filter has been developed for step response analysis in frequency domain. Simulation and application results prove the analysis method to be effective and accurate.