基于积分清零补偿的加速度计信号数字化处理方法  

Digital Processing Method of Accelerometer Signals Based on Integral Zeroing Compensation

作　　者：邹劲松 冯济琴[2] 唐皇 ZOU Jin-song;FENG Ji-qin;TANG Huang(Chongqing Industry Polytechnic College,Chongqing 401120,China;Engineering Research Center of Ministry of Educationof Machinery Inspection Technology and Equipment,Chongqing University of Technology,Chongqing 400054,China)

机构地区：[1]重庆工业职业技术学院,重庆401120 [2]重庆理工大学机械检测技术与装备教育部工程研究中心,重庆400054

出　　处：《仪表技术与传感器》2020年第10期25-28,共4页Instrument Technique and Sensor

摘　　要：为提高捷联惯性导航系统中速度和位置测量精度,针对加速度计输出信号特点,提出一种基于积分清零补偿的加速度计信号数字化处理方法,首先设计了加速度计输出信号转化为速度增量的数字化电路;其次,建立了积分增量参数模型,消除了受温度影响大的RC测量误差。同时,采用积分清零补偿方法提高了导航速度增量测量的实时性和准确性。为验证该方法的性能,将信号处理电路置于某50型激光陀螺捷联惯性导航系统中对X、Y、Z三轴加速度计进行实验测试。实验结果表明,该方法对加速度计信号处理后1 s的速度增量变化量小于5×10^-5 m/s。In order to improve the measurement accuracy of velocity and position in strap-down inertial navigation system,a digital processing method aiming at the characteristics of accelerometer output signals was proposed using the integral zeroing compensation approach.First,a digital circuit was designed to convert the accelerometer output signals into velocity increments.Second,an integral increment parameter model was established to eliminate the RC measurement errors which were greatly affected by temperature.In addition,the integral zeroing compensation approach was employed to improve the real-time and accuracy of the navigation in velocity increment measurement.To evaluate the performance of the proposed method,the signal processing circuit was used in a 50-type laser gyro strap-down inertial navigation system to test the accelerometers in X,Y,and Z axes.The experiment results show that the velocity increment variation in 1 s after signal processing is less than 5×10^-5 m/s.

关 键 词：加速度 惯性导航 数字化 积分 清零补偿 

分 类 号：TP2[自动化与计算机技术—检测技术与自动化装置]