Robust frequency identification of oscillatory electromechanical systems

Author

Goubej, M. ; Krejci, Alois ; Schlegel, Milos

Author_Institution

Univ. of West Bohemia, Pilsen, Czech Republic

fYear

2013

fDate

18-21 June 2013

Firstpage

79

Lastpage

84

Abstract

The paper deals with identification of electromechanical systems with oscillatory dynamics. Swept sine signal is chosen for excitation of the system and time-varying observer is used for estimation of its frequency response. Practical implementation issues for various mechanical configurations typical for industrial applications are analyzed and concept of frequency-separated semi-closed loop identification is proposed. Adaptive algorithm which suppresses nonlinearities of the system due to mechanical friction and estimates actual quality of measurement is derived. The identification method is demonstrated on an example of two-mass oscillatory system with nonlinear load-side friction characteristics.

Keywords

adaptive filters; closed loop systems; electromechanical effects; frequency estimation; frequency response; friction; observers; signal detection; adaptive algorithm; electromechanical systems; frequency response; industrial applications; mechanical friction; nonlinear load; oscillatory dynamics; robust frequency identification; semiclosed loop identification; sine signal; time-varying observer; Frequency measurement; Frequency response; Friction; Harmonic analysis; Load modeling; Mathematical model; Observers; frequency identification; motion control; oscillatory systems; two-mass model; vibration control;

fLanguage

English

Publisher

ieee

Conference_Titel

Process Control (PC), 2013 International Conference on

Conference_Location

Strbske Pleso

Print_ISBN

978-1-4799-0926-1

Type

conf

DOI

10.1109/PC.2013.6581387

Filename

6581387