Design of Angle Measurement System of Two-Channel Rotary
Transformer Based on FPGA

Journal of Atmospheric and Environmental Optics ›› 2021, Vol. 16 ›› Issue (4): 365-372.

Design of Angle Measurement System of Two-Channel Rotary Transformer Based on FPGA

GAN Ge1;2, XIONG Wei1∗, WU Yang1, LIU Zhancai1, LIU Jingyan1;2, ZHU Shuangshuang1;2

1 Key Laboratory of Optical Calibration and Characterization, Anhui Institute of Optics and Fine Mechanics, HFIPS, Chinese Academy of Sciences, Hefei 230031, China; 2 University of Science and Technology of China, Hefei 230026, China

Received:2020-04-24 Revised:2020-05-29 Online:2021-07-28 Published:2021-07-28
Contact: Wei /Xiong E-mail:frank@aiofm.ac.cn
Supported by:
Pre-Research Program of National Civil Space Technology of China

Abstract

Abstract: An angle measurement system of a two-channel rotary transformer for spaceborne equipment is designed. For the purpose of obtaining high precision motor rotation angle value, the principle, error analysis, data combination algorithm and the software and hardware design of the angle measurement system are studied, and FPGA is used to detect and calculate the angular displacement of the stepping motor. In order to verify the accuracy of the designed two-channel angle measurement system, a Heidenhain photoelectric encoder with higher resolution is used to collect the data at the same time. By comparing the two data, it is shown that the error of the designed angle measurement system is within 30′′, which meets the design accuracy requriements.

Key words: field programmable gate array, two channel rotary transformer, angle measurement technology; accuracy verification

CLC Number:

P414

GAN Ge, XIONG Wei∗, WU Yang, LIU Zhancai, LIU Jingyan, ZHU Shuangshuang, . Design of Angle Measurement System of Two-Channel Rotary Transformer Based on FPGA[J]. Journal of Atmospheric and Environmental Optics, 2021, 16(4): 365-372.

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