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Matched piezoelectric double sensor/actuator pairs for beam motion control

Matched piezoelectric double sensor/actuator pairs for beam motion control
Matched piezoelectric double sensor/actuator pairs for beam motion control
This paper presents a study of an arrangement consisting of two matched pairs of piezoelectric transducers bonded on a cantilever beam for vibration control. A single pair of transducers when used as a matched actuator and sensor in practice, is known not to have a strictly positive real (SPR) response due to coupling between in-plane motion and out-of-plane motion. The stability and performance of the matched single pair are thus limited when direct velocity feedback control is applied. An arrangement using four piezoelectric transducer layers arranged as two matched pairs has been suggested to overcome this problem. Theoretically, when the actuator pair and the sensor pair are connected out-of-phase, the response becomes SPR since in-plane motion cannot be excited. A smart beam with matched double piezoelectric sensor/actuator pairs has been implemented. Triangularly shaped sensors and actuators were bonded on each side of the beam. However, this matched double sensor/actuator pair could not excite pure out-of-plane flexural motion of the beam, due to the direct inter-layer coupling between the sensor and actuator which were bonded directly on to each other. Therefore, the four-layer smart beam does not provide an SPR response.
541-548
Lee, Y-S.
bf23cd82-676d-4a68-82d4-3539baede26a
Elliott, S.J.
721dc55c-8c3e-4895-b9c4-82f62abd3567
Gardonio, P.
bae5bf72-ea81-43a6-a756-d7153d2de77a
Lee, Y-S.
bf23cd82-676d-4a68-82d4-3539baede26a
Elliott, S.J.
721dc55c-8c3e-4895-b9c4-82f62abd3567
Gardonio, P.
bae5bf72-ea81-43a6-a756-d7153d2de77a

Lee, Y-S., Elliott, S.J. and Gardonio, P. (2003) Matched piezoelectric double sensor/actuator pairs for beam motion control. Smart Materials and Structures, 12 (4), 541-548. (doi:10.1088/0964-1726/12/4/305).

Record type: Article

Abstract

This paper presents a study of an arrangement consisting of two matched pairs of piezoelectric transducers bonded on a cantilever beam for vibration control. A single pair of transducers when used as a matched actuator and sensor in practice, is known not to have a strictly positive real (SPR) response due to coupling between in-plane motion and out-of-plane motion. The stability and performance of the matched single pair are thus limited when direct velocity feedback control is applied. An arrangement using four piezoelectric transducer layers arranged as two matched pairs has been suggested to overcome this problem. Theoretically, when the actuator pair and the sensor pair are connected out-of-phase, the response becomes SPR since in-plane motion cannot be excited. A smart beam with matched double piezoelectric sensor/actuator pairs has been implemented. Triangularly shaped sensors and actuators were bonded on each side of the beam. However, this matched double sensor/actuator pair could not excite pure out-of-plane flexural motion of the beam, due to the direct inter-layer coupling between the sensor and actuator which were bonded directly on to each other. Therefore, the four-layer smart beam does not provide an SPR response.

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Published date: 2003

Identifiers

Local EPrints ID: 10955
URI: https://eprints.soton.ac.uk/id/eprint/10955
PURE UUID: a3736a51-b1ec-46e0-b5c5-69955f57d540

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Date deposited: 10 May 2005
Last modified: 17 Jul 2017 17:05

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