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Proceedings Paper

Implementation of resolver excitation and resolver-to-digital conversion system based on DSP
Author(s): Xiangbo Xu; Jiancheng Fang
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Paper Abstract

In order to improve the integration of control moment gyro (CMG) gimbal servo system, this paper proposes a resolver excitation and resolver-to-digital conversion system based on digital signal processor (DSP). Only PWM, A/D functions of one DSP and a few peripheral circuits can afford to supply excitation to resolver, demodulate the resolver outputs and transform them into digital form. For decoding the resolver outputs, a simple inverse tangent method using a short lookup table is introduced. Sallen-Key low-pass filter, FIR band-pass filter, coarseness-precision combing with its error correction and a close-loop control method can improve angle solution and obtain velocity. Then angle and velocity are fed back to angle loop and velocity loop of the gimbal servo system to make the whole system very integrated. The main features include: easy realization, small bulk, light weight, low cost, adjustable parameters and wide uses. Experimental result shows that the angle precision can reach 17 bits.

Paper Details

Date Published: 13 October 2008
PDF: 7 pages
Proc. SPIE 7128, Seventh International Symposium on Instrumentation and Control Technology: Measurement Theory and Systems and Aeronautical Equipment, 71281C (13 October 2008); doi: 10.1117/12.806668
Show Author Affiliations
Xiangbo Xu, Beijing Univ. of Aeronautics and Astronautics (China)
Jiancheng Fang, Beijing Univ. of Aeronautics and Astronautics (China)


Published in SPIE Proceedings Vol. 7128:
Seventh International Symposium on Instrumentation and Control Technology: Measurement Theory and Systems and Aeronautical Equipment

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