基于曲线特征分析的插值法的四象限测角算法

The Angle-measurement Algorithm of the Four-quadrant Detector Based on the Interpolation Algorithm of the Character Analysis of Curve

四象限探测器测角系统需要同时满足系统反应时间短和误差小的要求。通过对现有测角算法的分析,得出基于反插值法的测角算法的实现速度快、精度较其他现有的测角方法高;在现有的反插值法的测角算法的基础上,通过分析实际曲线的特性,提出了结合曲线性质选择插值点的插值法在相同的插值点数的条件下,可以得到比一般等距插值精度更高的方位和俯仰的误差曲面图。

The four-quadrant detector can satisfy the requirements of both short response time and close toler- ance. By an analysis of existing four-quadrant detector algorithm, it comes to a conclusion that an angle-measured algorithm based on interpolation has higher rate and precision than others four-quadrant detector algorithms; Based on existing interpolation algorithm. Interpolation algorithm that chooses interpolation dots by combining the charac- ter of curve could gain higher precision figure of angle error than an interpolation algorithm of common equal inter- val is put forward what in the condition of a uniform number of interpolation dots.