基于混合积分算法的微小位移量测量方法研究

摘要

针对车载平台微小位移量的测量问题,提出了一种基于振动加速度测量的混合积分算法.根据加速度传感器采集信号造成的干扰,设计混合积分算法以减小现有二次积分算法的积分误差,从而控制趋势项误差.首先利用低频衰减积分算法对振动加速度信号进行一次积分得到振动速度信号,再利用多项式拟合积分算法对振动速度信号进行一次积分得到振动位移信号.设计振动台试验对混合积分算法进行验证,结果表明该算法对积分指标ERP和ERS都有所改善.%Aiming at the small displacement measurement of vehicle platform, a hybrid integral algorithm was proposed based on vibration acceleration measurement.According to the interference caused by acceleration sensor,the hybrid integral al-gorithm was designed to reduce the integral error of the existing quadratic integral algorithms,thereby controlling the trend error. Firstly,the vibration acceleration was obtained by the low-frequency damped integral algorithm,and then the vibration displace-ment was obtained by the polynomial fitting integral algorithm.The experimental results show that it brings improvement to the in-dexes of ERP and ERS compared with other quadratic integral algorithms.