High-performance position evaluation of optical encoders via a CORDIC algorithm and oversampling techniques on an FPGA

Author

Gröling, Ch ; Daaboul, Y. ; Lux, M. ; Orlik, T. ; Schumacher, W.

Author_Institution

Inst. fur Regelungstech., Tech. Univ. Braunschweig, Braunschweig, Germany

fYear

2009

Firstpage

1

Lastpage

9

Abstract

This paper illustrates a novel approach to obtain an improved position signal from optical encoders. The approach is based on an FPGA implementation of a CORDIC algorithm used for demodulation of the track signals. Due to fast demodulation, oversampling techniques can be used to considerably improve the position signal.

Keywords

analogue-digital conversion; demodulation; digital arithmetic; drives; fibre optic sensors; field programmable gate arrays; motion control; optical control; rotary convertors; signal sampling; CORDIC algorithm; FPGA implementation; encoder position evaluation; optical encoders; oversampling techniques; position signal; track signals demodulation; Acoustic noise; Demodulation; Field programmable gate arrays; Motion control; Optical feedback; Optical noise; Optical sensors; Power harmonic filters; Servomechanisms; Signal resolution; Harmonics; Motion Control; Noise; Sensor; Servo-drive;

fLanguage

English

Publisher

ieee

Conference_Titel

Power Electronics and Applications, 2009. EPE '09. 13th European Conference on

Conference_Location

Barcelona

Print_ISBN

978-1-4244-4432-8

Electronic_ISBN

978-90-75815-13-9

Type

conf

Filename

5278984