高精度反力矩测量系统研制及标定  

Development and calibration of high precision counter torque measurement system

作　　者：谢琛 傅骁[1] 段发阶[1] 马本富[2] 蒋佳佳[1] 刘昌文 Xie Chen;Fu Xiao;Duan Fajie;Ma Benfu;Jiang Jiajia;Liu Changwen(State Key Laboratory of Precision Testing Technology and Instruments,Tianjin University,Tianjin 300072,China;Tianjin Navigation Instrument Research institute,Tianjin 300131,China)

机构地区：[1]天津大学精密测试技术及仪器国家重点实验室,天津300072 [2]天津航海仪器研究所,天津300131

出　　处：《电子测量与仪器学报》2021年第8期29-37,共9页Journal of Electronic Measurement and Instrumentation

基　　金：国家重点研发计划项目(2020YFB2010800);国家自然科学基金项目(61905175,51775377,61971307);国家科技重大专项(2017-V-0009);霍英东教育基金会资助(171055);中国博士后科学基金(2020M680878)项目资助。

摘　　要：针对陀螺仪电机转矩波动高精度微力矩测量需求,提出了一种基于力矩器与角度传感器的高精度反力矩测量系统方案,基于共轴传递的阶梯轴结构,采用弹簧状游丝柔性连接外部接线,降低接线引入的弹性干扰力矩,实现了转矩波动的高精度测量;在传统砝码标定基础上,开展了测量系统静态标定及不确定度分析。实验结果表明,与优化前相比,系统测量精度提高了90%,在-10~10 mN·m的量程内,测量精度高达0.06%,线性度优于0.03%,漂移误差优于0.5μN·m/2 h,不确定度优于0.025%。In response to the need for high-precision micro-torque measurement of the torque fluctuation of the gyroscope motor,a high-precision counter-torque measurement system based on a torque device and an angle sensor is proposed.Based on a coaxially transmitted stepped shaft structure,the external wiring is flexibly connected with spring like hairspring to reduce the elastic interference torque caused by wiring,and realize the high-precision measurement of the torque fluctuation;based on the traditional weight calibration,the static calibration and uncertainty analysis of the measurement system are carried out.The experimental results show that the system measurement accuracy is improved by 90%compared to before optimization.In the range of-10~10 mN·m,the measurement accuracy is as high as 0.06%,the linearity is better than 0.03%,and the drift error is better than 0.5μN·m/2 h,the uncertainty is better than 0.025%.

关 键 词：反力矩 力矩器 角度传感器 高精度 力矩标定 不确定度分析 

分 类 号：TN6[电子电信—电路与系统] TH7[机械工程—仪器科学与技术]