摘要
石英摆片与极板之间的阻尼设计是静电平衡式加速度计控制系统设计中非常重要的一环,针对该阻尼系数难以准确计算的问题,提出了一种静电平衡式加速度计阻尼系数辨识方法。首先采用简化的仿真方法得到了不同密封气压下加速度计的阻尼系数,密封气压从1个大气压变化到100 Pa时,阻尼系数降低了约24倍,然后在加速度计闭环电路的静电平衡力矩前,通过叠加不同频率的等幅正弦信号,得到了加速度计阻尼系数辨识系统的响应特性曲线,最后采用自定义的拟合函数辨识得到了加速度计的阻尼系数,仿真与实验得到的阻尼系数的最大误差约为20%,表明所提加速度计阻尼系数辨识方法的有效性。
The damping design between the quartz pendulum piece and the plate is a very important part of the electrostatic balanced accelerometer control system design.Aiming at the problem that the damping coefficients are difficult to calculate accurately,a method for identifying the damping coefficients of electrostatic balanced accelerometers is proposed.Firstly,a simplified simulation method is used to obtain the damping coefficients of the accelerometer under different sealed air pressures.When the sealed air pressure changes from 1 atmosphere to 100 Pa,the damping coefficient is reduced by about 24 times.Then,the response characteristic curve of the damping identification system is obtained by overlaying equal amplitude sine signals with different frequencies before the electrostatic balance torque of the control system.Finally,the damping coefficient of the accelerometer is identified by using a custom fitting function.The maximum error between the damping coefficients obtained from simulation and experiment is approximately 20%,demonstrating the effectiveness of the accelerometer damping coefficient identification method.
作者
刘吉利
刘燕锋
马官营
韩璐
田亚男
LIU Jili;LIU Yanfeng;MA Guanying;HAN lu;TIAN Yanan(Beijing Institute of Control Engineering,Beijing 100190,China;Laboratory of Space Inertial Measurement Technology,Beijing 100190,China)
出处
《中国惯性技术学报》
北大核心
2025年第8期826-831,共6页
Journal of Chinese Inertial Technology
基金
国家重点研发计划(2021YFB3203104)。
关键词
静电力平衡
加速度计
阻尼系数
仿真
辨识
electrostatic force balance
accelerometer
damping coefficient
analysis
identification
