基于chirp 信号的导弹伺服机构动态测试系统

针对常规导弹伺服机构动态测试方法存在的不足和动态测试需求,设计基于chirp信号测试的导弹伺服机构动态测试系统.系统由数据采集和信号发生功能模件、伺服放大器电路、信号调理电路、显示器、鼠标/键盘和打印机等组成.硬件采用研华IPC-610L工控机和PCI-1706U多功能数据采集卡,并用C#编程实现人机交互界面.系统具有系统自检、激励信号产生、测试数据的采集、数据处理和测试数据管理功能.在测试过程中,系统产生超低频信号,并同步采集输入激励和响应输出,采用 chirp 信号作为激励信号,充分激励模态,应用 FFT 变换,完成导弹伺服机构的动态性能的测试.测试结果表明:该系统能快速准确地获得系统频率特性,缩短测试时间.

Dynamic Test System of Missile Servo Mechanism Based on Chirp Signal

In view of the deficiency existing in current dynamic test method and demand for dynamic testing of missile servo mechanism, a dynamic test system was designed based on chirp signal test. The test system consists of data acquisition and signal generation module, servo amplifier circuit, signal conditioning circuit, display, mouse/keyboard and printer, etc. IPC-610L industrial computer and PCI-1706U multi-function data acquisition card were utilized to construct the test system hardware, and computer interface was realized by c # programming. System function includes self-check, excitation signal generation, data acquisition, data processing and test data management. In the process of testing, dynamic test system is sustainable producing ultra-low frequency signal, and synchronous sampling input excitation and output response. Chirp signal is taken as excitation signal to incentive system mode fully and FFT transform is applied to calculate dynamic performance. Test results show that the system can rapidly and accurately obtain system frequency characteristics and shorten test time.