基于椭球假设的三轴加速度计误差标定与补偿  

Three-axis accelerometer error calibration and compensation based on ellipsoid hypothesis

作　　者：刘艳霞[1] 方建军[1] 杨清梅[1] 

机构地区：[1]北京联合大学自动化学院电气与控制工程系,北京100101

出　　处：《传感器与微系统》2014年第6期52-54,64,共4页Transducer and Microsystem Technologies

基　　金：北京市自然科学基金资助项目(4142018);北京联合大学启明星大学生科技创新项目(201411417SJ014);北京联合大学新起点计划资助项目(ZK201205)

摘　　要：为提高三轴加速度计测量精度,根据其误差来源和产生机理,建立了误差模型;通过对误差模型分析,指出三轴加速度计输出轨迹符合椭球假设,提出一种椭球拟合法确定误差模型,实现对加速度计误差补偿。三轴加速度计捷联安装到三自由度转台进行误差标定和补偿,实验结果表明:加速度计最大、最小绝对误差可以减小100倍左右,精度达到10-3m/s2。该方法对采集数据的姿态没有太高要求,补偿效果显著,简单易行。In order to improve measurement precision of three-axis accelerometer,establish error model based on its error source and producing mechanism ; through analysis on error model, point out that output trajectory of three-axis accelerometer accords with ellipsoid hypothesis, an ellipsoid fitting method is put forward to determine error model and realize accelerometer error compensation. Three-axis accelerometer is strapdown installed to three-DoF turntable for error calibration and compensation, and experimental results show that the maximum and minimum absolute error of accelerometer can be reduced about 100 times and the accelerometer precision can reach 10^-3m/ s^2. The method is simple and feasible because of its low attitude requirements for gathering data, in addition, the compensation effect is remarkable.

关 键 词：加速度计 椭球假设 三自由度转台 最小二乘法 

分 类 号：TP212.9[自动化与计算机技术—检测技术与自动化装置]