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Undergraduate Research Project Management System

Design of Compliant Mechanism for Planar Motion Amplification

Status Complete
Seeking Researchers No
Start Date 09/01/2006
End Date 06/30/2007
Funding Source Dr. Alex Hills Engineering Research Awards
Funding Amount
Community Partner
Related Course
Last Updated 07/05/2008 01:25AM


  Nicolae Lobontiu

Student Researchers
  Paul Bilodeau


The project proposes to model, design and experimentally test several planar compliant mechanisms that are aimed at amplifying the input mechanical motion. Such compliant mechanisms use flexure hinges (which are slender, flexible portions that can bend and enable relative rotation between two adjacent rigid links) instead of classical rotation joints. They are modern devices being applied in precision positioning as well as in micro/nano electromechanical systems (MEMS/NEMS). The focus of this project will be on compliant mechanisms that have two stages of motion amplification wand which have double symmetry, realizing thus an amplified output motion which is parallel to the input one. Various flexure hinges (such as right-circular, corner-filleted and elliptic) will be implemented in these compliant mechanisms. Two models will be developed to assist with the subsequent design process. One simplified model will consider the flexure as being point-like, whereas the second model will be precise and will be based on the real dimensions and shape of the flexure hinges. Each model will predict the mechanical amplification (or advantage). Several compliant mechanisms will be selected from the model/analysis pool and execution drawings will be produced and sent via email to the company which will fabricate these mechanisms by electric discharge machining (EDM). The fabricated mechanisms will then be tested in the School of Engineering's labs at UAA. A first round of testing will apply simple mechanical actuation and measuring of the input/output motion, whereas in a second testing set actuation by linear actuators (voice coils) will be used. The experimental results are going to be compared with the model data and conclusions will be derived with respect to the obtained results.

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