设计了一种基于CPLD的21位分辨率双通道旋转变压器的解码及精度测量方案.通过CPLD对AD2S82A解码输出的两路并行16位数据进行读取、纠错、编码、输出,最后输出21位角度信号,这样整个测角系统就成为了主系统的一个外设.实验中搭建测试平台,用自准直仪和多面棱镜对该测角系统精度进行测量.结果表明,测角误差均方根值达到20″,经系统误差修正后整个系统测角误差均方根值达到9.46″.最后本文对测角系统的系统误差产生原因进行了分析.%A scheme of an angle measurement circuit for the two-speed resolver is designed, which includes the decoding and measurement of the precision. The 16-bits data of parallel communication of the two AD2S82A is read, corrected, and assembled by CPLD. According to the requirement of the main system, the CPLD completes the pretreatment of the data from the AD2S82A and outputs the parallel data of the angle information, the bits of which are up to 21-bits. With the CPLD, this angle measurement system becomes one single peripheral of the main system. A scheme of measurement test is carried out with collimator and prism in the laboratory. The results achieve the designed functions of the scheme completely and the error by Root Mean Square (RMS) of the single angle measurement circuit is 20 arcseconds, which reaches 9.46 arcseconds after correcting the systemic error with software. Lastly, the causations of the systemic error of the angle measurement circuit are indicated.
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