摘要：永磁同步电动机位置伺服系统是捷联式自动垂直钻井系统实现电控液压导向功能的关键组成部分，其中位置传感器通常采用具有高可靠性的旋转变压器以适应井下高温、振动和干扰等复杂恶劣环境。本文针对当前轴角变换器芯片无法满足钻井作业中高温环境的问题，提出了一种基于DSP的数字RDC实现方案，并利用高精度光电编码器对其进行数字标定与补偿，实验结果表明：经误差补偿后，本文所设计数字RDC精度为30′，能够满足井下位置测量需求。

关键词：自动垂直钻井系统；旋转变压器；数字RDC；标定补偿
Abstract: Permanent magnet synchronous motor position servo system is the key component to achieve the electronically controlled hydraulic guiding function of strapdown automatic vertical drilling system. The highly reliable rotary transformer is usually used for position sensor to adapt to the complex and harsh environment of the downhole temperature, vibration and interference. According to environmental operating temperature limitations for the current resolvertodigital conversion(RDC) chip, a DSPbased digital RDC implementation was presented in this paper, and the highprecision optical encoder was used for its error calibration and compensation. The experimental results show that the accuracy of designed digital RDC is 30′after error compensation, which can meet the downhole measurement needs.

Key words: automatic vertical drilling system; resolver; digital RDC; calibration compensation