Title :
A Novel Design Method for Resolver-to-Digital Conversion
Author :
Yijing Wang ; Zhiqi Zhu ; Zhiqiang Zuo
Author_Institution :
Tianjin Key Lab. of Process Meas. & Control, Tianjin Univ., Tianjin, China
Abstract :
A simple and novel design method for resolver-to-digital conversion is presented. The proposed method takes advantage of the auxiliary sinusoidal signals generated by addition and subtraction operations of the demodulated signals of the resolver´s outputs. A pseudolinear signal is obtained through appropriate mathematical manipulation between the auxiliary sinusoidal signals and the demodulated ones. A calibration strategy is then provided to achieve the highest possible precision. It is shown that the error between the calibrated angular and the true angular position is less than 0.00235° over 0° ~ 360°. The proposed method enables the determination of the angular position without utilizing a lookup table or additional reference signals. Furthermore, the presented strategy is implemented using a field-programmable gate array. Finally, our method is tested on a tracking radar antenna servo system where resolvers are installed on it. Several experiments under different conditions are performed to further verify the effectiveness of the proposed method.
Keywords :
calibration; field programmable gate arrays; network synthesis; auxiliary sinusoidal signals; calibrated angular position; calibration strategy; design method; field-programmable gate array; mathematical manipulation; pseudolinear signal; resolver-to-digital conversion; tracking radar antenna servo system; true angular position; Calibration; Clocks; Demodulation; Logic circuits; Radar antennas; Signal resolution; Table lookup; Field-programmable gate array (FPGA); Resolver-to-digital conversion (RDC); field-programmable gate array (FPGA); look-up table (LUT); lookup table (LUT); resolver-to-digital conversion (RDC);
Journal_Title :
Industrial Electronics, IEEE Transactions on
DOI :
10.1109/TIE.2014.2375254