基于迭代计算的加速度计标定方法

在建立三轴加速度计数学模型的基础上,提出了一种新的三轴加速度计的标定算法.加速度计在静止状态下,各敏感轴分量的模值等于当地重力加速度的数值.通过六个不同静态位置加速度计的输出建立标定方程.采用迭代算法对加速度计的标度因子和零偏进行解算.仿真结果表明,算法能够有效标定出加速度计误差参数,并且对较大偏差的初值同样适用,且迭代过程收敛迅速,计算量小,非线性适应性较强,能够拓展标定算法的应用范围.

Accelerometer Calibration Method Based on Iterative Calculation

Based on the design of triaxial acceleromeer mathmatic model, a new triaxial aecelerometer callibration meth od is presented. When the accelerometer is safionary module value of each sensitinty axle is equal to its local grauty. Colibra tion equation is set through accelerometer outputs of six defferent stationary place. Iteration calculation is used to estimate gain factors and bias. The simulation result shows that the calibration method can effectively estimate error parameters of ac celerometer, and can be applied in calculating the initial value of large deviation. It has aduantages, such as small calculation work, strong nonlinear adaptability.