一种快速单步的频率特性测试方法

Fast frequency response testing method with one step

为实现系统的高效和高精度频率特性测试,介绍了一种以多谐差相信号作为激励信号,运用相关分析法的系统单步频率特性快速测试方法。探讨了多谐差相(SPHS)信号的性质和特点,设计了以此信号作为激励信号的测试过程,详细推导了相关分析法测试原理。以某型舵机为研究对象,在MATLAB环境下完成了仿真试验。试验结果表明,测试信号基本可以覆盖被测试系统的频带宽度,该测试方法在中频段可以到达较高的测试精度和稳定性,适合频率特性的快速高精度测试。

In order to test the frequency of a system with high efficiency and precision,in this paper,a new testing method for frequency response based on The Schroeder-Phased Harmonic （SPHS） Signal is put forward.This method use correlation analysis method and finish the testing with one step.The characteristic of SPHS signal is analyzed,and frequency response procedure with correlation analysis algorithm is introduced.According to the structure of a certain missile control actuator,the problem is simulated by using Matlab tools.The experimental results showed that the frequency band of the exciting signal is enouge for measuring actuator of control systems,and in the middle frequency range this method with high precision and stability,is the ideal frequency response testing method.