Structural Design of Piezoelectric Actuator Considering Polarization Direction and Continuous Approximation of Material Distribution

Young Seok Lim; Seung Jae Min; Shinji Nishiwaki

doi:10.4028/www.scientific.net/KEM.326-328.1407

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Behavior of Lightweight Piezoceramic Composite Actuator under Compressive Load
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Structural Design of Piezoelectric Actuator Considering Polarization Direction and Continuous Approximation of Material Distribution
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A Study on the Actuating Performance of Unimorph Piezoelectric Actuators with a Center Load
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Wireless Strain Monitoring of CFRP Laminates Using Electric Resistance Change with Oscillating Circuit
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Experimental Investigation of Smart Hull Structures Based on Macro Fiber Composite Actuators
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Structural Design of Piezoelectric Actuator Considering Polarization Direction and Continuous Approximation of Material Distribution

Abstract:

In the design of piezoelectric actuator the concept of compliant mechanism combined with piezoelectric materials has been used to magnify either geometric or mechanical advantage. The polarization of piezoelectric materials is considered to improve actuation since the piezoelectric polarization has influences on the performance of the actuator. The topology design of compliant mechanism can be formulated as an optimization problem of material distribution in a fixed design domain and continuous approximation of material distribution(CAMD) method has demonstrated its effectiveness to prevent the numerical instabilities in topology optimization. The optimization problem is formulated to maximize the mean transduction ratio subject to the total volume constraints and solved using a sequential linear programming algorithm. The performance improvement of Moonie actuator design confirms an effect of polarization direction and CAMD.