Title :
From theoretical differentiation methods to low-cost digital implementation
Author :
Dridi, M. ; Scorletti, G. ; Smaoui, M. ; Tournier, D.
Author_Institution :
Lab. AMPERE, Ecole Centrale de Lyon, Ecully, France
Abstract :
In this paper we review different differentiation methods and we investigate their digital implementation. The motivation is the design of a numerical differentiator based on a low-cost microcontroller device. Standard digital differentiation algorithms are presented and an alternative approach based on weighted H∞ filtering is introduced. In this approach, the differentiator design is based on signal and noise spectral density modelisation for the derivative estimation accuracy improvement. Experimental results are presented in order to prove the effectiveness of such approach.
Keywords :
differentiation; digital arithmetic; microcontrollers; H∞ filtering; low cost microcontroller device; low-cost digital implementation; noise spectral density modelisation; numerical differentiator; theoretical differentiation methods; Algorithm design and analysis; Low pass filters; Mathematical model; Noise; Observers; Transfer functions;
Conference_Titel :
Industrial Electronics (ISIE), 2010 IEEE International Symposium on
Conference_Location :
Bari
Print_ISBN :
978-1-4244-6390-9
DOI :
10.1109/ISIE.2010.5637595