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Active vibration control of periodic disturbances using a DEAP damper

Active vibration control of periodic disturbances using a DEAP damper
Active vibration control of periodic disturbances using a DEAP damper
A potential problem that could possibly restrict the application of dielectric electro-active polymer (DEAP) actuators for active vibration damping is highlighted in this contribution. If a periodic electric field is applied to a DEAP actuator to counteract a periodic vibratory disturbance, a very common vibration attenuation problem, then the mechanical output will be the square of the periodic input. This will result in an actuator output with several harmonics. Therefore from a vibration damping perspective not only does the first harmonic of the periodic disturbance need to be considered but also additional harmonics, introduced by the actuator itself. Feedforward active damping of periodic vibratory disturbances using a tubular DEAP actuator is addressed in this contribution. Initially the addition of a d.c. bias offset to the periodic voltage signal applied to the actuator is investigated to try and reduce the effect of the higher harmonics. The use of a linearizing gain schedule is then also examined. Using a comparatively large d.c. bias voltage offset has a linearizing affect on the voltage-strain characteristics of the tubular actuator thereby reducing the influence of the higher harmonics on the resulting vibration damping characteristics. The disadvantage of this approach is that the operating range, in terms of the actuator stroke that can be achieved, is decreased. The use of a linearizing gain schedule also reduces the influence of the higher harmonics but provides less of a constraint on the operating range of the actuator
9780819480576
1-12
Society of Photo-Optical Instrumentation Engineers
Sarbana, Rahimullah
3e8f4f04-6652-4ac5-85ff-96b9b59c256f
Jones, Richard W.
6de0b8b1-d1ca-40e0-88e9-1f31a464a757
Mace, Brian R.
cfb883c3-2211-4f3a-b7f3-d5beb9baaefe
Rustighi, Emiliano
9544ced4-5057-4491-a45c-643873dfed96
Bar-Cohen, Yoseph
Sarbana, Rahimullah
3e8f4f04-6652-4ac5-85ff-96b9b59c256f
Jones, Richard W.
6de0b8b1-d1ca-40e0-88e9-1f31a464a757
Mace, Brian R.
cfb883c3-2211-4f3a-b7f3-d5beb9baaefe
Rustighi, Emiliano
9544ced4-5057-4491-a45c-643873dfed96
Bar-Cohen, Yoseph

Sarbana, Rahimullah, Jones, Richard W., Mace, Brian R. and Rustighi, Emiliano (2010) Active vibration control of periodic disturbances using a DEAP damper. Bar-Cohen, Yoseph (ed.) In Proceedings of Electroactive Polymer Actuators and Devices (EAPAD) 2010. Society of Photo-Optical Instrumentation Engineers. pp. 1-12 . (doi:10.1117/12.845764).

Record type: Conference or Workshop Item (Paper)

Abstract

A potential problem that could possibly restrict the application of dielectric electro-active polymer (DEAP) actuators for active vibration damping is highlighted in this contribution. If a periodic electric field is applied to a DEAP actuator to counteract a periodic vibratory disturbance, a very common vibration attenuation problem, then the mechanical output will be the square of the periodic input. This will result in an actuator output with several harmonics. Therefore from a vibration damping perspective not only does the first harmonic of the periodic disturbance need to be considered but also additional harmonics, introduced by the actuator itself. Feedforward active damping of periodic vibratory disturbances using a tubular DEAP actuator is addressed in this contribution. Initially the addition of a d.c. bias offset to the periodic voltage signal applied to the actuator is investigated to try and reduce the effect of the higher harmonics. The use of a linearizing gain schedule is then also examined. Using a comparatively large d.c. bias voltage offset has a linearizing affect on the voltage-strain characteristics of the tubular actuator thereby reducing the influence of the higher harmonics on the resulting vibration damping characteristics. The disadvantage of this approach is that the operating range, in terms of the actuator stroke that can be achieved, is decreased. The use of a linearizing gain schedule also reduces the influence of the higher harmonics but provides less of a constraint on the operating range of the actuator

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Published date: 2010

Identifiers

Local EPrints ID: 146877
URI: http://eprints.soton.ac.uk/id/eprint/146877
ISBN: 9780819480576
PURE UUID: e64ddcd0-c78c-4895-a69d-78ac5750725e
ORCID for Brian R. Mace: ORCID iD orcid.org/0000-0003-3312-4918
ORCID for Emiliano Rustighi: ORCID iD orcid.org/0000-0001-9871-7795

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Date deposited: 27 May 2010 09:06
Last modified: 20 Jul 2019 01:05

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Contributors

Author: Rahimullah Sarbana
Author: Richard W. Jones
Author: Brian R. Mace ORCID iD
Editor: Yoseph Bar-Cohen

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