Topology optimization of piezoelectric bi-material actuators with velocity feedback control
作者机构：School of EngineeringUniversity of Sao PauloSao PauloSP 05508-030Brazil
出 版 物：《Frontiers of Mechanical Engineering》 (机械工程前沿（英文版）)
年 卷 期：2019年第14卷第2期
页 面：190-200页
核心收录：
学科分类：08[工学] 0802[工学-机械工程] 0801[工学-力学（可授工学、理学学位）]
基 金：support by CNPq (National Council for Scientific and Technological Development) supported by CAPES
主 题：topology optimization method bi-material piezoactuator active velocity feedback control timedomain transient analysis host structure design vibration suppression
摘 要：In recent years,the new technologies and discoveries on manufacturing materials have encouraged researchers to investigate the appearance of material properties that are not naturally *** featuring a specific stiffness,or structures that combine non-structural and stmctural functions are applied in the aerospace,electronics and medical industry ***,structures designed for dynamic actuation with reduced vibration response are the focus of this *** bi-material and multifunctional concepts are considered for the design of a controlled piezoelectric actuator with vibration suppression by means of the topology optimization method(TOM).The bi-material piezoelectric actuator(BPEA)has its metallic host layer designed by the TOM,which defines the structural function,and the electric function is given by two piezo-ceramic layers that act as a sensor and an actuator coupled with a constant gain active velocity feedback control(AVFC).The AVFC,provided by the piezoelectric layers,affects the structural damping of the system through the velocity state variables readings in time *** dynamic equation analyzed throughout the optimization procedure is fully elaborated and *** dynamic response for the rectangular fbur-noded finite element analysis is obtained by the Newmark s time-integration method,which is applied to the physical and the adjoint systems,given that the adjoint formulation is needed for the sensitivity analysis.A gradient-based optimization method is applied to minimize the displacement energy output measured at a predefined degree-of-freedom of the BPEA when a transient mechanical load is *** are obtained for different control gain values to evaluate their influence on the final topology.
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