介绍了相关分析法的基本原理及其在舵机系统性能分析中的应用,实测了系统在特定输入频率下的响应曲线并对比分析了过零算法与相关算法在求系统相移中的结果,实验证明了相关算法较之传统的过零点法,具有误差小,一致性好,可信度高的优点,已经应用于舵机性能分析中,并取得良好的效果。

In the paper, the principle of correlation methodology and its application in the analysis of servo system were introduced. The response curve at special frequency was measured and the result of correlation methodology in phase-deviation calculation was compared with zero-crossing method. Correlation methodology is featured with low-inaccuracy, high-consistency and credibility. Finally, the advantage of correlation methodology was proved by practice in the analysis of servo-actuator system.