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Proceedings Paper

Active unbalance control in an asymmetrical rotor system using a suspension with linear actuators
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Paper Abstract

This work deals with the problem of the active unbalance control in an asymmetrical rotor-bearing system with two disks supported by an active suspension based on two lateral linear actuators. For the analysis and control synthesis a mathematical model is developed using Finite Element Methods (FEM). A linear quadratic regulator (LQR) is applied in order to minimize the displacements of the two disks by means of the application of an active bearing with control forces provided by an arrangement of two linear actuators. The control scheme is designed to attenuate the overall system response in the natural frequencies (resonances), taking into account the unbalance response associated to both disks and shaft and, hence, controlling the system performance during the first modes. To do this, a Luenberger type observer is used to estimate those not measurable states from the displacements in only one shaft point and, therefore, making possible the synthesis of an optimal LQR control based on the estimated state feedback. The control forces obtained from LQR control are introduced to the mathematical model of actuators and taking into account their dynamics, we get the voltage inputs necessary to provide the unbalance compensation forces. The proposed control scheme is proved by numerical results and then, validated experimentally on a test rig which was designed and constructed. Numerical and experimental results show significant reductions in the unbalance response of the overall system.

Paper Details

Date Published: 12 April 2010
PDF: 12 pages
Proc. SPIE 7643, Active and Passive Smart Structures and Integrated Systems 2010, 76432W (12 April 2010); doi: 10.1117/12.847304
Show Author Affiliations
Manuel Arias-Montiel, Ctr. de Investigación y de Estudios Avanzados (Mexico)
Gerardo Silva-Navarro, Ctr. de Investigación y de Estudios Avanzados (Mexico)


Published in SPIE Proceedings Vol. 7643:
Active and Passive Smart Structures and Integrated Systems 2010
Mehrdad N. Ghasemi-Nejhad, Editor(s)

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