力矩器磁场对微小加速度计非线性误差的影响
|
摘要
挠性摆式微小加速度计在导航系统中有广阔的应用前景,其非线性误差主要由力矩器标度因数的非线性所造成,其中力矩器磁场对其有重要影响。利用ANSYS Maxwell对力矩器磁场分布的均匀性进行了仿真,分析了力矩器加工和装配产生的偏差对于磁场均匀性的影响规律。结果表明,力矩器组件磁钢和上导磁帽对磁场影响较大。保证磁钢厚度加工偏差在±10μm以内,相对标准偏差CV值的相对误差小于5.4%。控制上导磁帽高度的加工偏差在±6μm以内,CV值的相对误差可小于4.4%。力矩器装配的同轴度偏差对于磁场均匀性及线圈受力影响较小,控制在±8μm以内即可。上述研究结果为指导加速度生产和装配工艺,提高其稳定性提供依据。
The flexible pendulum miniature accelerometer is widely applicate in the field of navigation system. The nonlinear errors in working stability are mainly caused by the non-linearity of the scale factor of the torque converter,in which the magnetic field of the torque converter has significant influence on it. ANSYS Maxwell is used to simulate the uniformity of the magnetic field distribution of the torque converter. The influence of the error caused by the machining and assembling of the moment is analyzed. The results show that the magnetic steel and the upper magnetic cap have great influence on the magnetic field in the components of the accelerometer. The deviation of the thickness of the magnetic steel is less than±10 μm,and the relative error of the relative standard deviation CV is less than 5.4%. The machining deviation of the upper magnetic cap height within±6 μm to ensure that the relative error of the CV value less than 4.4%.The axiality tolerance of the torque device assembly has little influence on the uniformity of the magnetic field,when the assembly error controlled within±8 μm. The above results provide the theoretical basis for accelerometer of fabrication and assembly process with high stability.
The flexible pendulum miniature accelerometer is widely applicate in the field of navigation system. The nonlinear errors in working stability are mainly caused by the non-linearity of the scale factor of the torque converter,in which the magnetic field of the torque converter has significant influence on it. ANSYS Maxwell is used to simulate the uniformity of the magnetic field distribution of the torque converter. The influence of the error caused by the machining and assembling of the moment is analyzed. The results show that the magnetic steel and the upper magnetic cap have great influence on the magnetic field in the components of the accelerometer. The deviation of the thickness of the magnetic steel is less than±10 μm,and the relative error of the relative standard deviation CV is less than 5.4%. The machining deviation of the upper magnetic cap height within±6 μm to ensure that the relative error of the CV value less than 4.4%.The axiality tolerance of the torque device assembly has little influence on the uniformity of the magnetic field,when the assembly error controlled within±8 μm. The above results provide the theoretical basis for accelerometer of fabrication and assembly process with high stability.
引文
[1]刘攀龙,王国松.石英挠性加速度计的温度补偿研究[J].弹箭与制导学报,2010(5):233-234,240.
[2]何铁春,周世勤.惯性导航加速度计[M].北京:国防工业出版社,1983.
[3]王勇,唐光庆,周静梅.石英挠性加速度计磁路仿真分析与优化设计[J].压电与声光,2010(4):551-553,557.
[4]黄小凯,陈云霞,张叔农.基于模糊理论的加速度计标度因数稳定性分析[J].北京航空航天大学学报,2012(1):133-137.
[5]唐永超.石英挠性加速度计力矩器热磁耦合仿真与试验研究[D].国防科学技术大学,2012.
[6]孙霖,郭嵩,王磊,宋开臣.高精度石英挠性加速度测量装置的结构设计与研究[J].舰船科学技术,2017,39(17):190-193.
[7]葛颂,李醒飞,董九志.石英挠性加速度计中补偿环的优化设计[J].传感技术学报,2016,29(11):1678-1683.
[8]杨鹏翔,秦永元,游金川.加速度计组件温度特性在系统建模[J].传感技术学报,2009,22(12):1690-1695.
[9]刘艳霞,方建军,杨清梅.基于椭球假设的三轴加速度计误差标定与补偿[J].传感器与微系统,2014,6:52-54,64.
[10]刘润,李海兵,王姝歆.高精度石英挠性加速度计的温度场分析[J].电子测量技术,2015,38(2):6-9,19.
[11]Ernesto Danieli,Perlo J,Blümich B,et al.Highly Stable and Finely Tuned Magnetic Fields Generated by Permanent Magnet Assemblies[J].Phys Rev Lett,2013,110,180801.
[12]Li J,Schomburg W K.Magnetic Accelerometer from Polymer[J].Procedia Engineering,2011,25:535-538.
[13]周建,阎维平,石丽国.SCR反应器入口段流场均匀性的数值模拟研究[J].热力发电,2009,38(4):22-25.
[2]何铁春,周世勤.惯性导航加速度计[M].北京:国防工业出版社,1983.
[3]王勇,唐光庆,周静梅.石英挠性加速度计磁路仿真分析与优化设计[J].压电与声光,2010(4):551-553,557.
[4]黄小凯,陈云霞,张叔农.基于模糊理论的加速度计标度因数稳定性分析[J].北京航空航天大学学报,2012(1):133-137.
[5]唐永超.石英挠性加速度计力矩器热磁耦合仿真与试验研究[D].国防科学技术大学,2012.
[6]孙霖,郭嵩,王磊,宋开臣.高精度石英挠性加速度测量装置的结构设计与研究[J].舰船科学技术,2017,39(17):190-193.
[7]葛颂,李醒飞,董九志.石英挠性加速度计中补偿环的优化设计[J].传感技术学报,2016,29(11):1678-1683.
[8]杨鹏翔,秦永元,游金川.加速度计组件温度特性在系统建模[J].传感技术学报,2009,22(12):1690-1695.
[9]刘艳霞,方建军,杨清梅.基于椭球假设的三轴加速度计误差标定与补偿[J].传感器与微系统,2014,6:52-54,64.
[10]刘润,李海兵,王姝歆.高精度石英挠性加速度计的温度场分析[J].电子测量技术,2015,38(2):6-9,19.
[11]Ernesto Danieli,Perlo J,Blümich B,et al.Highly Stable and Finely Tuned Magnetic Fields Generated by Permanent Magnet Assemblies[J].Phys Rev Lett,2013,110,180801.
[12]Li J,Schomburg W K.Magnetic Accelerometer from Polymer[J].Procedia Engineering,2011,25:535-538.
[13]周建,阎维平,石丽国.SCR反应器入口段流场均匀性的数值模拟研究[J].热力发电,2009,38(4):22-25.