Open AccessModelling, identification, and compensation of fractional‐order creep in frequency domain for piezoactuators
Author(s) -
Liu Yanfang,
Liu Hong,
Zhu Dongfang
Publication year - 2016
Publication title -
electronics letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.375
H-Index - 146
eISSN - 1350-911X
pISSN - 0013-5194
DOI - 10.1049/el.2016.0611
Subject(s) - differentiator , frequency domain , compensation (psychology) , creep , time domain , integrator , control theory (sociology) , domain (mathematical analysis) , frequency response , computer science , mathematics , materials science , engineering , mathematical analysis , filter (signal processing) , telecommunications , electrical engineering , psychology , control (management) , artificial intelligence , psychoanalysis , composite material , computer vision , bandwidth (computing)
Unlike traditionally studied in time domain, the creep in a piezoelectric actuator is studied in frequency domain. It is modelled as a fractional‐order integrator, identified in frequency domain, and compensated for by connecting with a fractional‐order differentiator in serial. It is demonstrated that identification and compensation in frequency domain are much simpler to execute than that in time domain. Experimental results validate the effectiveness of the proposed algorithm and the creep non‐linearity reduces by greater than 80%.