Design a fast tracking resolver to digital conversion method using FPGA for rotary motion applications

To achieve high‐speed, high accuracy angular positioning performance, a modern rotary sensing system adopts resolver‐to‐digital (R/D) conversion techniques. However, in conventional position architectures, the computation of the basic resolver functions is very time consuming due to serial computing constraints. This paper presents a novel Field Programmable Gate Array (FPGA) based tracking resolver‐to‐digital (R/D) conversion method. This fast and accurate tracking R/D converter was constructed utilizing its arcsine look‐up table associated with a conversion algorithm. Experimental results are presented to verify the performance of the proposed R/D conversion method. This method gives the potential to achieve high‐speed, high‐accuracy rotary motion tracking and sensing for control systems.