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Estimating ensemble average power delivered by a piezoelectric patch actuator to a non-deterministic subsystem

Abdul Muthalif, Asan Gani and Walid, Azni N. and Mohd Nor, Khairul A. (2014) Estimating ensemble average power delivered by a piezoelectric patch actuator to a non-deterministic subsystem. Journal of Sound and Vibration, 333 (4). pp. 1149-1162. ISSN 0022-460X

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Engineering systems such as aircraft, ships and automotive are considered built-up structures. Dynamically they are taught of as being fabricated from many components that are classified as deterministic subsystems (DS) and non-deterministic subsystems (Non-DS). Structures’ response of the DS is deterministic in nature and analysed using deterministic modelling methods such as finite element method (FEM). The response of Non-DS is statistical in nature and estimated using statistical modelling technique such as statistical energy analysis (SEA). SEA method uses power balance equation, in which any external input to the subsystem must be represented in terms of power. Often, input force is taken as point force and ensemble average power delivered by point force is already well-established. However, the external input can also be applied in the form of moments exerted by a piezoelectric (PZT) patch actuator. In order to be able to apply SEA method for input moments, a mathematical representation for moment generated by PZT patch in the form of average power is needed, which is attempted in this paper. A simply-supported plate with attached PZT patch is taken as a benchmark model. Analytical solution to estimate average power is derived using mobility approach. Ensemble average of power given by the PZT patch actuator to the benchmark model when subjected to structural uncertainties is also simulated using Lagrangian method. These two results are compared and presented in this paper. The effects of size and location of the PZT actuators on the power delivered to the plate are later investigated.

Item Type: Article (Journal)
Additional Information: 3352/26675
Uncontrolled Keywords: Piezoelectric patch actuator, non-deterministic subsystem, SEA, hybrid modelling method
Subjects: T Technology > TA Engineering (General). Civil engineering (General) > TA365 Acoustics in engineering. Acoustical engineering
T Technology > TJ Mechanical engineering and machinery
Kulliyyahs/Centres/Divisions/Institutes (Can select more than one option. Press CONTROL button): Kulliyyah of Engineering > Department of Mechatronics Engineering
Depositing User: Ir. Ts. Dr Asan Gani Abdul Muthalif
Date Deposited: 04 Jan 2013 10:26
Last Modified: 20 Jun 2018 13:21
URI: http://irep.iium.edu.my/id/eprint/26675

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