Hejun Du et al 2000 Smart Mater. Struct. 9 788 doi:10.1088/0964-1726/9/6/308
Hejun Du1, Gih Keong Lau1, Mong King Lim1 and Jinhao Qui2
Show affiliationsTopological optimization is used to systematically design mechanical amplifiers that magnify the limited actuation stroke of a piezoelectric actuator. The design problem is posed as a material distribution problem using a variable thickness method. Two design goals are formulated for the design of the mechanical amplifier. They are the maximum dynamic stroke and the maximum dynamic magnification factor. The optimization problems are then solved using a method of moving asymptotes. The design domain is modelled as a plane-stress solid, and is actuated by harmonic excitation without the inclusion of damping. To model the actuator and workpiece, their stiffness is included and idealized as rod elements in the finite-element analysis. To show the capability of the design methodology, an elliptic amplifier and a magnification mechanism, used in a dot-matrix printer head, are reinvented using topological optimization. The dynamic effects on the optimum topology are also studied using different excitation frequencies.
85.50.-n Dielectric, ferroelectric, and piezoelectric devices
77.84.-s Dielectric, piezoelectric, ferroelectric, and antiferroelectric materials
Issue 6 (December 2000)
Received 28 January 2000, in final form 8 June 2000
Hejun Du et al 2000 Smart Mater. Struct. 9 788
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