Nonlinear feedback control of a stroke limited inertial actuator using a state estimation approach
Nonlinear feedback control of a stroke limited inertial actuator using a state estimation approach
Inertial actuators can be used with velocity feedback controllers to reduce structural vibration, but the finite stroke length can affect the behaviour and the stability of the control system. Stroke saturation results in impulse-like excitation, which is transmitted to the structure and may result in damage. Moreover, the shocks produced by the impacts reduce the overall damping and eventually leads to instability and limit cycle oscillations. This paper examines the implementation of a nonlinear feedback controller in order to avoid collisions of the proof mass with the actuator’s end stops, thus preventing this instability. Firstly, the nonlinear model of a stroke limited inertial actuator is identified experimentally. Secondly, a nonlinear control strategy is presented, which actively increases the internal damping of the actuator, and its experimental implementation is discussed. Finally, the estimation of the relative proof mass velocity is presented using the nonlinear model of the actuator and an extended Kalman filter algorithm.
341-354
KU Leuven - Departement Werktuigkunde
Dal Borgo, Mattia
7eeac32d-7dc9-4645-89cc-acee5a293867
Ghandchi Tehrani, Maryam
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Elliott, Stephen
721dc55c-8c3e-4895-b9c4-82f62abd3567
Dal Borgo, Mattia
7eeac32d-7dc9-4645-89cc-acee5a293867
Ghandchi Tehrani, Maryam
c2251e5b-a029-46e2-b585-422120a7bc44
Elliott, Stephen
721dc55c-8c3e-4895-b9c4-82f62abd3567
Dal Borgo, Mattia, Ghandchi Tehrani, Maryam and Elliott, Stephen
(2018)
Nonlinear feedback control of a stroke limited inertial actuator using a state estimation approach.
Moens, D., Desmet, W., Pluymers, B. and Rottiers, W.
(eds.)
In ISMA2018-USD2018 Proceedings.
KU Leuven - Departement Werktuigkunde.
.
(In Press)
Record type:
Conference or Workshop Item
(Paper)
Abstract
Inertial actuators can be used with velocity feedback controllers to reduce structural vibration, but the finite stroke length can affect the behaviour and the stability of the control system. Stroke saturation results in impulse-like excitation, which is transmitted to the structure and may result in damage. Moreover, the shocks produced by the impacts reduce the overall damping and eventually leads to instability and limit cycle oscillations. This paper examines the implementation of a nonlinear feedback controller in order to avoid collisions of the proof mass with the actuator’s end stops, thus preventing this instability. Firstly, the nonlinear model of a stroke limited inertial actuator is identified experimentally. Secondly, a nonlinear control strategy is presented, which actively increases the internal damping of the actuator, and its experimental implementation is discussed. Finally, the estimation of the relative proof mass velocity is presented using the nonlinear model of the actuator and an extended Kalman filter algorithm.
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Accepted/In Press date: 30 June 2018
Venue - Dates:
28th International Conference on Noise and Vibration Engineering, ISMA 2018 and 7th International Conference on Uncertainty in Structural Dynamics, USD 2018, , Leuven, Belgium, 2018-09-17 - 2018-09-19
Identifiers
Local EPrints ID: 434346
URI: http://eprints.soton.ac.uk/id/eprint/434346
PURE UUID: 7ac72f52-5189-47cf-b709-c7d5bc005eed
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Date deposited: 20 Sep 2019 16:30
Last modified: 16 Mar 2024 04:12
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Contributors
Author:
Mattia Dal Borgo
Editor:
D. Moens
Editor:
W. Desmet
Editor:
B. Pluymers
Editor:
W. Rottiers
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