线振动台系统误差对PIGA二次项标定影响分析  

Influence of system error of linear-vibrator on the PIGA quadratic term calibration

作　　者：贺栋 严小军[1] 张沛晗 朱嘉婧 HE Dong;YAN Xiaojun;ZHANG Peihan;ZHU Jiajing(Beijing Aerospace Control Instrument Research Institute,Beijing 100854,China)

机构地区：[1]北京航天控制仪器研究所

出　　处：《自动化与仪器仪表》2020年第1期23-27,共5页Automation & Instrumentation

摘　　要：针对陀螺加速度计(PIGA)在线振动台上测试时,线振动台系统误差对PIGA二次项系数标定的影响,提出了一种正倒置的测试方法,通过将线振动台系统误差(波形畸变、横向加速度、寄生转动)导致的加速度变化代入PIGA模型中,并根据PIGA的实际输出,对采用最小二乘法标定的二次项系数进行显著性分析。实验结果表明,系统误差中波形畸变会对二次项系数的标定精度产生正比影响。通过抑制波形畸变,可以有效减少PIGA二次项系数的测试误差,提高PIGA的使用精度。To determine the influence of linear-vibrator’s system error on pendulous integrated gyro-accelerometer’s quadratic coefficient,the test method that input axis is vertical upward and downward is proposed.Variation of acceleration,which caused by wave form distortion,lateral acceleration and parasitic rotation,is taken into error model.According to the actual output of PIGA,the quadratic coefficients of calibration are analyzed by least square method.The results show that the calibration accuracy of quadratic coefficient is squared with waveform distortion.By restraining the waveform distortion,the measurement error of quadratic coefficient is reduced and the accuracy of PIGA can be effectively improved.

关 键 词：陀螺加速度计(PIGA) 低频线振动台 系统误差 二次项系数 

分 类 号：TP202[自动化与计算机技术—检测技术与自动化装置]