Decode Algorithm Of Resolver And System Design Based On FPGA

Resolver is extensive use in aerial surveying, aerospace, vessel, weapons, radar, and communication field as a result of high accuracy and reliability characteristics of it. Resolver output analog signal, it must be convert to digital signal of angle before being used in other control system or computers. It is a complex process to convert the analog signal to digital signal. The larger size and higher power consumption of existing angle-measured systems influences the performance of measure systems, especially used in digital systems. The higher cost of the deviation compensation and error correction is another problem of existing angle-measured systems. This thesis studies micro-intelligent angle-measured systems to solve these problems.Field Programmable Gate Array (FPGA), a new type of programmable device, has been made a good progress in recent years. With the continuous application and development, the scale and integration of electronic design are being enlarged. Then the method and ideas of electronic system design are improved from time to time.The purpose of this paper is to study how to implement the hardware decoding algorithm with FPGA and build a Resolver system with it.This paper introduces a kind of Revolver-to-Digital Converter, which is composed of analog circuit, microprocessor and serial interface. The microprocessor generator an encouraging voltage and Analog-to-digital converter changes input analog signal of revolver into digital signal, which is convenient for handle and operate data in microprocessor. In microprocessor, the converted digital convert to the digital signalθthrough the arc tangent based on CORDIC.The reason about the measured error of Revolver-to-Digital Converter is found out and a method to reduce the measured error is mentioned.At last, the experimental data shows, the hardware and the software of Revolver-to-Digital Converter can relatively accurately complete above-mentioned signal conversion and data operation.