Design Of A Robust Model Reference Adaptive Voltage Controller For An Electrodynamic Shaker

Leandro Della Flora; Hilton Abílio Gründling

doi:10.18618/REP.2008.3.133140

Authors

Leandro Della Flora Grupo de Eletrônica de Potência e Controle, UFSM. 97105-900 Santa Maria - RS - Brazil
Hilton Abílio Gründling Grupo de Eletrônica de Potência e Controle, UFSM. 97105-900 Santa Maria - RS - Brazil

DOI:

https://doi.org/10.18618/REP.2008.3.133140

Keywords:

Discrete-Time Control, Pulse-Width Modulated Inverters, Robust Adaptive Control, Shakers

Abstract

This paper presents in detail the design of a high performance sinusoidal voltage controller for switching-mode AC power amplifiers intended to drive electrodynamic shakers. To obtain good reference tracking performance and stability over a wide frequency range and guarantee robustness under the effects of parameter variations and harmonic distortions, a model reference adaptive control scheme is employed. A very simplified model of the electrodynamic shaker is considered. The back electromotive force is dealt as unknown disturbance and the inductance of the armature is not modeled. The control strategy is digitally implemented and the design procedure requires only basic information about nominal electrical parameters of the shaker and the power amplifier. Fixed and swept frequency experimental tests performed up to 2 kHz demonstrate the feasibility of this solution. The implementation of the voltage controller is also described.

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Author Biographies

Leandro Della Flora, Grupo de Eletrônica de Potência e Controle, UFSM. 97105-900 Santa Maria - RS - Brazil

was born in São Borja, RS, Brazil, in 1979. He received the B.S. and M.S. degree in electrical engineering from the Universidade Federal de Santa Maria, Santa Maria, Brazil, in 2003 and 2005, respectively. He is currently working towards his Ph.D. degree at the same institution. His areas of research interest include control systems, power electronics and instrumentation applied to vibration testing using electrodynamic shakers. M. Eng. Della Flora is an active student member of the Brazilian Power Electronics Society.

Hilton Abílio Gründling, Grupo de Eletrônica de Potência e Controle, UFSM. 97105-900 Santa Maria - RS - Brazil

was born in Santa Maria, RS, Brazil, in 1954. He received the B.S. degree from the Pontifícia Universidade Católica do Rio Grande do Sul, Porto Alegre, Brazil, in 1977, the M.S. degree from the Universidade Federal de Santa Catarina, Florianópolis, Brazil, in 1980 and the Ph.D. degree from the Instituto Tecnológico de Aeronáutica, São Paulo, Brazil, in 1995. Since 1980, he has been with the Universidade Federal de Santa Maria, Santa Maria, Brazil, where he is currently a Professor. His research interests include robust model reference adaptive control, discrete-time control and control systems applications.

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