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Abstract:
A new 2-DOF positioning device driven by impact force of end-loaded
piezoelectric cantilever bimorphs is proposed. Prototype of the
positioning device is fabricated. Dynamic model of the impact drive
positioning device based on Karnopp friction model is set up. According
the results of simulation and experiments to the dynamic characteristics
of the positioning device, a certain method of fixed-frequency and
adjustable-amplitude is confirmed to control the positioning device.
That the simulation results agree well with the experimental results
indicates that the dynamic model is capable of doing precise analysis
for the positioning device.
Key words: Precision positioning Piezoelectric bimorph Impact drive Dynamic simulation Friction
CLC No: TP242
国家863计划(2002AA423150)、国家自然科学基金(50475010)和高等学校博士学科点专项科研基金(2005018020)资助项目. Received 20060302, received in revised form 20060911
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