Title :
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
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;
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
