空间用洛伦兹力激励器静态标定测试系统

摘要

基于洛伦兹力的空间用电磁激励器是空间高微重力主动振动隔离系统的核心控制部件.为满足系统实时变化的控制器输出要求,必须标定激励器的设计参数,得到输出力与输入电流之间的关系.设计了一套用于激励器静态标定的自动测试系统,并对其硬件结构设计、软件模型及测试数据处理进行了介绍.系统硬件结构包含力传感器、力值显示控制仪、三轴位移台、电机驱动器模块及数据接收分发模块.系统软件采用LabVIEW编程技术,实现了对信号的采样、显示和存储.利用Matlab进行数据处理,得到相应处理结果,为激励器进一步的优化设计提供了技术依据.%The static calibration test system for Lorentz Actuators of active payload-level vibration isolation system for experiments in space is systematically studied by simulations and tests. In order to meet the demand for real-time changes controller outputs in high quality microgravity vibration isolation system, actuator design parameters should be inspected and the relationship between output force and the input current should be deduced. A test system was designed, and its hardware structure, software model as well as the test program diagram, were introduced. The system hardware contains force sensors, force value shows, three axis displacement control apparatus, motor drive module and data receiving and distribution module. The LabVIEW programming technology was utilized in the system software to realize signal sampling, data displaying and storage. Finally,Matlab was used to process data. The test results provide technical basis for further optimal design rnof the actuators. By fitting error graphics, the correctness and rationality of the system design were rnverified, which provides a reliable guarantee for the normal operation of the active vibration isolation rnsystem.