一种高精度旋转变压器解码算法  

A High Precision Rotary Transformer Decoding Algorithm

作　　者：张伟鹏 杨瑞峰 郭晨霞 葛双超 ZHANG Wei-peng;YANG Rui-feng;GUO Chen-xia;GE Shuang-chao(School of Instrument and Electronics,North University of China,Shanxi Institute of Automatic Testing Equipment and System Engineering Technology,Taiyuan 030051,China)

机构地区：[1]中北大学仪器与电子学院山西省自动化检测装备与系统工程技术研究中心

出　　处：《科学技术与工程》2019年第24期157-163,共7页Science Technology and Engineering

基　　金：国家国际科技合作项目(2014DFR70650);山西省重点研发计划项目(201703D121028-2,2018D121058)资助

摘　　要：针对传统旋转变压器解码成本高和精度差等问题,提出了一种新的解码算法,利用旋转变压器输出信号进行解调和归一化处理后,再经过一系列混合运算得到伪线性信号后,对此信号进行逻辑分区判断,根据判断结果进行计算得到未补偿的角度信号,最后通过非线性精度补偿以提高解码精度。研究结果表明,该算法的实现不需要利用查表法和附加参考信号就可以实现高精度解码。经过理论计算,在0°~360°,未补偿前解码误差不高于0.072 1°,补偿后解码误差不高于8.65°×10^-5。该算法在TMS320F283 35中经过实验验证,结果表明其可以准确解得角度信息,解码误差为0.000 389°,验证了算法的可行性。Aiming at the problems of high cost and poor precision of traditional resolver decoding,a new decoding algorithm was proposed.Firstly,the specific method was to use the resolver output the signal.Secondly,after the signal was demodulated and normalized and a series of hybrid operations to obtain a pseudo-linear signal,the signal was logically partitioned and judged,and according to the judgment result to obtain an uncompensated angle signal.Finally,the decoding accuracy was improved by nonlinear precision compensation.The results show that the algorithm can realize high-precision decoding without using the look-up table method and additional reference signals.After theoretical calculation,the uncompensated pre-decoding error was not higher than 0.072 1°in the range of 0°to 360°,the compensated decoding error is not higher than 8.65°×10^-5.The algorithm has been experimentally verified in TMS320F28335.The results show that the angle information can be accurately solved,and the decoding error is 0.000 389°,which verifies the feasibility of the algorithm.

关 键 词：传感器 旋转变压器 伪线性变换 逻辑分区 精度补偿 高精度 

分 类 号：TM383.2[电气工程—电机]