一种新的测量系统频率响应的方法

摘要

The system output is real-time sampled by taking the exponentialdescent sine combined signal as the system input.Based on the known system input and output,the system frequency response is obtained through using the discrete Fourier transform and processed by the frequency domain compensation,so resolving the problem of inaccuracy of the frequency response of the system at the high frequency end and thus getting a measuring method of high applicable value for the single input and single output system frequency response.%以指数衰减的组合正弦信号作为系统输入信号，同时实时采集系统输出,在已知系统输入及输出的基础上，运用离散傅立叶变换求得系统频率响应，并采用频域补偿法对所求得的系统频率响应进行处理，解决了系统的频率响应在高频端不准确这一特殊问题,从而得到了一套对单输入单输出系统频率响应的测量方法，具有较大的实用价值。