一种微推力器阵列测试台系统辨识与动态补偿  

Identification of a micro-thrust array test stand and its dynamic error compensation

作　　者：刘书杰[1] 方蜀州[1] 刘旭辉[1] 

机构地区：[1]北京理工大学宇航学院,北京100081

出　　处：《固体火箭技术》2011年第6期794-797,共4页Journal of Solid Rocket Technology

基　　金："十一五"民用航天科研预先研究项目

摘　　要：将动态力测量方法改进后应用在一种特殊的微推力器阵列测试台架上,解决了用低固有频率测试台测试高频信号的问题。将台架进行合理简化后,用ANSYS分析其模态振型,并用实验数据验证振型分析的正确性。设计改进了向台架施加负阶跃力的实验方法,即用烧断悬丝砝码的方法向系统最小成本地加载准阶跃力。针对系统的理论模型,设计补偿环节参数,应用逆传递函数补偿方法对测试台测试信号进行动态补偿,使台架的动态测试性能大大提高。A dynamic force test method was modified for application in the new micro-thrust array test stand so as to solve an irrational problem. The simplified test stand is used for modal mode by using ANSYS. The results verify that mode analysis is correct. The method applying step force on the test stand was improved, i. e. the quasi-step force can be applied by burning strings. The system model was obtained. According to the theoretical model, inverse transfer function compensation method was used for dynamic compensation of signal so as to improve dynamic performance of test system greatly.

关 键 词：模态分析 参数识别 逆传递函数算法 阶跃响应实验 动态补偿 

分 类 号：V435.6[航空宇航科学与技术—航空宇航推进理论与工程]