基于chirp信号导弹伺服机构频率特性测试研究

摘要

Servo mechanism is the executing agency of control system,and frequency test is an important test content.In view of low speed and discrete frequency points of traditional sine point-by-point scanning signal frequency test,chirp signal is put forward to replace traditional test signal.Low-pass filter and wavelet packet transform method are used to filter out interference in the process of test with the anti-interference ability of the system improved,and the effectiveness of the testing method is verified by simulation.%伺服机构是控制系统的执行机构,频率特性测试是重要测试内容.针对传统正弦逐点扫描法的测试速度慢、频率点不连续,提出采用chirp信号替代传统频率测试信号方法.利用低通滤波、小波包变换,对测试过程中的干扰进行滤除,提高系统的抗干扰能力,并通过仿真验证了测试方法的有效性.