一种便携式导弹电液伺服机构动态测试系统设计

Design of Dynamic Test System for Portable Missile Electro-hydraulic Servo Mechanism

针对现有导弹测试设备存在的装备体积大、结构复杂、维修困难、测试时间长等突出问题,提出一种基于PCI总线和虚拟仪器技术的便携式测试系统设计方案;在分析电液伺服机构工作原理基础上,推导建立其数学模型;根据伺服机构动态测试需求,完成测试系统硬件设计和选型,按照“模块化、标准化、小型化”的原则,采用工控机控制PCI-1742U多功能数据采集卡实现测试过程中的信号激励和采集;基于Visual Studio软件开发平台,编制动态测试软件,实现测试过程中激励信号参数设置、数据采集、信号处理以及数据管理等功能;最后通过基于正弦相关分析法和基于chirp信号的测试方法的仿真测试实验分析了采样频率对测试结果的影响。

Aimed at the problems of existing missile test equipment such as large size,complex structure,difficult maintenance and long test time,a portable test system based on PCI bus and virtual instrument technology was proposed.On the basis of analyzing the working principle of electro-hydraulic servomechanism,its mathematical model was deduced and established.The hardware design and selection of the test system were completed through the dynamic testing requirements of the servo mechanism.According to the principle of“modularization,standardization and miniaturization”,the industrial computer was used to control the PCI-1742U multi-function data acquisition card,and realize the signal excitation and acquisition during the test process.Based on the Visual Studio software development platform,the dynamic test software was written to achieve the functions of excitation signal parameter setting,data acquisition,signal processing and data management in the testing process.Finally,the influence of sampling frequency on the test results was analyzed through simulation test experiments based on the sine correlation analysis and chirp signal test method.