利用里程仪可以抑制惯导的误差积累，但里程仪刻度系数误差对组合系统的定位精度影响很大，必须对其进行校正。
The error accumulation of inertial navigation system can be restrained via OD, however, OD scale factor error has remarkable effect on the positioning precision.
该算法首先求解目标的高度，避免了方程系数矩阵病态，因而在算法量相当的情况下，可获得较好的目标定位精度。
This algorithm, which first solves target's altitude and avoids ill-conditioned system of equation, can improve the location accuracy with the same operating complexity.
而伺服系统的静态、动态性能直接关系数控机床的定位速度、定位精度和加工精度。
And the static and dynamic systems of Servo system affect positioning speed, positioning accuracy and machining accuracy of numerical control machine tool directly.
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