RBF网络在编码器误差补偿中的应用  

Application of RBF Networks for Error Compensation in Optical Encoders

作　　者：洪喜[1,2] 续志军[1] 杨宁[1] 佟丽翠[1,2] 

机构地区：[1]中国科学院长春光学精密机械与物理研究所,长春130033 [2]中国科学院研究生院,北京100039

出　　处：《光电工程》2009年第8期139-142,共4页Opto-Electronic Engineering

基　　金：国家自然科学基金资助项目(60574089)

摘　　要：利用径向基函数(RBF)网络进行光电编码器误差补偿,具有非线性处理特性好、逼近精度高等特点。针对RBF网络在工程应用中的特点,文中首先介绍了RBF修正模型与编码器检测转台的结合应用,在进行编码器误差检测的同时即可完成仿真分析;再进一步根据算法在数字信号处理器(DSP)中的应用,介绍了算法的优化方法。实际工作表明:将建模与检测相结合,效果直观,方法灵活;优化后的补偿算法在满足运算时间的基础上并未对补偿精度带来明显影响,可将系统精度提高1～3倍。To improve the precision of the encoder system, a method for error compensation in optical encoder was presented by applying Radial Basis Function （RBF）. At first, how to integrate RBF model with error detecting system of encoder was introduced. The simulation analysis can be completed while run error detecting. At the same time, necessary model parameters could be obtained. Then, the parameters were written to DSP to run real error compensation. The optimization for RBF algorithms was introduced to resolve the problems existed in the RBF model, i.e., large amount of data, massive matrix operation and complicated arithmetic, ect. The practical application proves that the simulation effect is direct and clear by combing the model building with error detecting. The test results show that the optimized compensation model meets the requirements of running time without decreasing compensation precision obviously and the precision of system error is improved 1-3 times.

关 键 词：径向基函数 光电编码器 数字信号处理器 误差补偿 

分 类 号：TN762[电子电信—电路与系统] TP183[自动化与计算机技术—控制理论与控制工程]