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PD Controller Synthesis Based on Frequency Response of Actuator-Rotating Systems

Buttini, Thiago Malta and Felscher, Patrick and Nicoletti, Rodrigo (2011):
PD Controller Synthesis Based on Frequency Response of Actuator-Rotating Systems.
9. Internationale Tagung Schwingungen in rotierenden Maschinen (SIRM2011), Darmstadt, 21.-23. Feb. 2011, [Conference or Workshop Item]

Abstract

Active magnetic bearings (AMB) application has been increased in the last years due their capacity of both supporting the rotor and controlling lateral vibrations. Besides, once there is no contact with the shaft, there is no friction and no need of lubrication. Traditionally, the control system is designed by trial and error or it is based on the mathematical model of the system, which can be imprecise and/or difficult to be obtained. In this sense, this work presents a method of computing all PD stabilizing gains for a given linear, single-input single-output system based on the D-decomposition technique, which requires only the knowledge of frequency response functions (FRFs) of the system. The method is tested in an actuator-rotating system and it is demonstrated that the stability boundary locus in the KD x KP plane can be easily plotted, and the most suitable gains in order to minimize the resonant peak can be found, ensuring both the stability and the reduction of rotor lateral vibration.

Item Type: Conference or Workshop Item
Erschienen: 2011
Creators: Buttini, Thiago Malta and Felscher, Patrick and Nicoletti, Rodrigo
Title: PD Controller Synthesis Based on Frequency Response of Actuator-Rotating Systems
Language: English
Abstract:

Active magnetic bearings (AMB) application has been increased in the last years due their capacity of both supporting the rotor and controlling lateral vibrations. Besides, once there is no contact with the shaft, there is no friction and no need of lubrication. Traditionally, the control system is designed by trial and error or it is based on the mathematical model of the system, which can be imprecise and/or difficult to be obtained. In this sense, this work presents a method of computing all PD stabilizing gains for a given linear, single-input single-output system based on the D-decomposition technique, which requires only the knowledge of frequency response functions (FRFs) of the system. The method is tested in an actuator-rotating system and it is demonstrated that the stability boundary locus in the KD x KP plane can be easily plotted, and the most suitable gains in order to minimize the resonant peak can be found, ensuring both the stability and the reduction of rotor lateral vibration.

Divisions: 16 Department of Mechanical Engineering > Institute of Applied Dynamics (AD)
16 Department of Mechanical Engineering
Event Title: 9. Internationale Tagung Schwingungen in rotierenden Maschinen (SIRM2011)
Event Location: Darmstadt
Event Dates: 21.-23. Feb. 2011
Date Deposited: 06 Apr 2011 12:17
Identification Number: 31
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