Error Analysis and Compensation of the Orthogonal Magnetic Encoder

Author

Lin, Qi ; Li, Tiecai ; Zhou, Zhaoyong

Author_Institution

Dept. of Electr. Eng., Harbin Inst. of Technol., Harbin, China

fYear

2011

fDate

21-23 Oct. 2011

Firstpage

11

Lastpage

14

Abstract

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.

Keywords

encoding; error analysis; error compensation; field programmable gate arrays; harmonic analysis; magnetic sensors; DC offset; FPGA; assembly technology; error analysis; error compensation; harmonics; orthogonal magnetic encoder; processing technology; signal amplitude; signal phase nonorthogonality; Equations; Harmonic analysis; Magnetic resonance imaging; Mathematical model; Measurement uncertainty; Pulse width modulation; Vectors; compensation; error; magnetic encoder;

fLanguage

English

Publisher

ieee

Conference_Titel

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

Conference_Location

Beijing

Print_ISBN

978-0-7695-4519-6

Type

conf

DOI

10.1109/IMCCC.2011.12

Filename

6153947