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Design and computational optimization of a decoupled 2-DOF monolithic mechanism
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Qin, Yanding, Shirinzadeh, Bijan, Tian, Yanling, Zhang, Dawei and Bhagat, Umesh (2014) Design and computational optimization of a decoupled 2-DOF monolithic mechanism. IEEE/ASME Transactions on Mechatronics, 19 (3). pp. 872-881. doi:10.1109/TMECH.2013.2262801 ISSN 1083-4435.
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Official URL: http://dx.doi.org/10.1109/TMECH.2013.2262801
Abstract
This paper presents the mechanical design, computational optimization, and experimentation of a decoupled 2-DOF monolithic mechanism. In the mechanical design, statically indeterminate leaf parallelograms provide the decoupling effect, and the displacement of the piezoelectric actuator (PEA) is amplified with a statically indeterminate lever mechanism. In a piezo-driven mechanism, the contact interface between the PEA and the mechanism is a major cause of the discrepancies between the estimated and measured characteristics. However, no explicit and reliable model is available to estimate the contact stiffness. In this paper, a computational optimization based on the response surface methodology is performed and the influence of the contact interface is taken into consideration by adding adequate safety margin to the design objectives. Ultimately, a prototype is manufactured and experimentally investigated for its characteristics and performances. Experimental results show that the developed mechanism has a workspace range in excess of 82 μm × 82 μm with a first natural frequency of 423 Hz (with a 53.4-g load mass). The cross-axis coupling ratio is experimentally measured to be below 1%, indicating excellent decoupling performances.
Item Type: | Journal Article | ||||||||
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Divisions: | Faculty of Science, Engineering and Medicine > Engineering > Engineering | ||||||||
Journal or Publication Title: | IEEE/ASME Transactions on Mechatronics | ||||||||
Publisher: | Institute of Electrical and Electronics Engineers | ||||||||
ISSN: | 1083-4435 | ||||||||
Official Date: | June 2014 | ||||||||
Dates: |
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Volume: | 19 | ||||||||
Number: | 3 | ||||||||
Page Range: | pp. 872-881 | ||||||||
DOI: | 10.1109/TMECH.2013.2262801 | ||||||||
Status: | Peer Reviewed | ||||||||
Publication Status: | Published | ||||||||
Access rights to Published version: | Restricted or Subscription Access | ||||||||
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