Nonlinear control and stability analysis of a stroke limited inertial actuator in velocity feedback
Nonlinear control and stability analysis of a stroke limited inertial actuator in velocity feedback
Inertial actuators are active devices used, with velocity feedback controllers, to reduce structural vibrations. Physical limits, such as stroke saturation, can affect the behaviour and the stability of the control system. In particular, limit cycle oscillations are observed. In this paper, we propose a nonlinear control strategy to prevent the destabilisation of the velocity feedback loop due to stroke saturation. A time domain model of the stroke limited inertial actuator mounted on a single degree of freedom structure is derived. The stability of the nonlinear system under a velocity feedback control with fixed gain is investigated using the describing function method for the detection of limit cycles. The outcomes are also verified by time domain simulations. The presented nonlinear controller increases the stability region of the system compared to only the velocity feedback controller.
Dal Borgo, Mattia
d2b1ebc3-8b5f-4bb1-8b73-c1012e45241d
Ghandchi Tehrani, Maryam
c2251e5b-a029-46e2-b585-422120a7bc44
Elliott, Stephen
721dc55c-8c3e-4895-b9c4-82f62abd3567
25 June 2017
Dal Borgo, Mattia
d2b1ebc3-8b5f-4bb1-8b73-c1012e45241d
Ghandchi Tehrani, Maryam
c2251e5b-a029-46e2-b585-422120a7bc44
Elliott, Stephen
721dc55c-8c3e-4895-b9c4-82f62abd3567
Dal Borgo, Mattia, Ghandchi Tehrani, Maryam and Elliott, Stephen
(2017)
Nonlinear control and stability analysis of a stroke limited inertial actuator in velocity feedback.
ENOC2017 - 9th European Nonlinear Dynamics Conference, Budapest University of Technology and Economics, Budapest, Hungary.
25 - 30 Jun 2017.
10 pp
.
Record type:
Conference or Workshop Item
(Paper)
Abstract
Inertial actuators are active devices used, with velocity feedback controllers, to reduce structural vibrations. Physical limits, such as stroke saturation, can affect the behaviour and the stability of the control system. In particular, limit cycle oscillations are observed. In this paper, we propose a nonlinear control strategy to prevent the destabilisation of the velocity feedback loop due to stroke saturation. A time domain model of the stroke limited inertial actuator mounted on a single degree of freedom structure is derived. The stability of the nonlinear system under a velocity feedback control with fixed gain is investigated using the describing function method for the detection of limit cycles. The outcomes are also verified by time domain simulations. The presented nonlinear controller increases the stability region of the system compared to only the velocity feedback controller.
Text
Nonlinear control and stability analysis of a stroke limited inertial actuator in velocity feedback - Mattia DAL BORGO
- Version of Record
More information
Published date: 25 June 2017
Venue - Dates:
ENOC2017 - 9th European Nonlinear Dynamics Conference, Budapest University of Technology and Economics, Budapest, Hungary, 2017-06-25 - 2017-06-30
Organisations:
Signal Processing & Control Grp
Identifiers
Local EPrints ID: 410247
URI: http://eprints.soton.ac.uk/id/eprint/410247
PURE UUID: 8117f430-1ea0-4fe3-998e-f58f743b8f12
Catalogue record
Date deposited: 06 Jun 2017 04:02
Last modified: 15 Mar 2024 14:06
Export record
Contributors
Author:
Mattia Dal Borgo
Download statistics
Downloads from ePrints over the past year. Other digital versions may also be available to download e.g. from the publisher's website.
View more statistics