基于插值法的四象限探测器测角算法设计与实现方法分析

Design and realization of the angle-measurement algorithm of the four-quadrant detector based on the interpolation algorithm

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。在分析了四象限探测器测角现有算法的基础上,提出了将插值法和传统算法相结合的一种改进算法,测角误差较小且容易实现。设计了适合实际应用的一套测角系统:模拟信号接收后,首先进行放大、去噪、相关检测等处理,随后进行模数转换,这一部分电路设计为目标方位检测电路;得到数字信号后,对其进行计算处理以得到偏移量,这部分系统以浮点DSP TMS320C6713为核心数字信号处理器,设计了6713的最小系统。另外,给出了以取13个特征点为例用反插值法设计的算法程序。

The four-quadrant detector can satisfy the requirements of both short response time and close rolerance.Based on the analysis of several algorithms in eliminating the four-quadrant detector errors,an improved algorithm combining the interpolation and traditional methods was put forward.The error was small and it was easy to achieve as well with this algorithm.Then,a set of goniometer system based on the algorithm was designed which was fit for actual applications.The receiving analog signals were first treated by a special process of amplifying,noise removing and coherent detection.Next AD converting was made and this part was designed as target bearing detection circuit.Last,the digital signals were computed to get the offsets after being received,and this part of system consisted of the floating point DSP TMS320C6713 as the core digital signal processor,and the minimum system of 6713 was designed.Moreover,the program realization of the algorithm was provided which was designed on inverse interpolation by taking 13 characteristic value points for example.