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Error Analysis and Compensation of the Orthogonal Magnetic Encoder

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3 Author(s)
Qi Lin ; Dept. of Electr. Eng., Harbin Inst. of Technol., Harbin, China ; Tiecai Li ; Zhaoyong Zhou

Aimed at the FPGA-based orthogonal magnetic encoder design, this paper analyzes several actual errors caused by the limitation of the processing technology and the assembly technology, which include the error caused by the imbalance of signal amplitude, the error caused by the nonorthogonality of signal phase, the error caused by the DC offset, and the error caused by harmonics. Based on ideal voltage signals, the mathematical expression of these errors cause by non-ideal characteristics and the corresponding compensation measure are derived, and through simulation and experimental, the expression and measure are verified to be right and effective.

Published in:

Instrumentation, Measurement, Computer, Communication and Control, 2011 First International Conference on

Date of Conference:

21-23 Oct. 2011

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