Kinematic Precision Scaling With Physical Errors in Miniaturization of Four-Bar Polymer Compliant Machines

A precision-scaling kinematic model with the effects of physical error is investigated in the miniaturization of four-bar polymer machines with compliant joints. A pseudolink-ages model (PLM) for the multiple-links compliant machine is formulated. A scaling formulation of the multiple-links compliant machine and its associated PLM is developed. A method for scaled-up test and scaled-down analysis of the compliant mechanism with the considerations of physical errors of fabrication processes, material properties, and experimental tests is proposed. By defining an index of signal-to-noise ratio, the performance of the miniature realization under physical errors is evaluated. The applications of the scaling PLM for the miniature realization of a compliant machine are illustrated by performing both numerical analysis and experimental testing on four-bar compliant polyethylene machines.

[1]  Ted Belytschko,et al.  Finite Elements, An Introduction , 1982 .

[2]  A. Midha,et al.  A Compliance Number Concept for Compliant Mechanisms, and Type Synthesis , 1987 .

[3]  J. Bendat,et al.  Random Data: Analysis and Measurement Procedures , 1987 .

[4]  Ren-Jung Chang,et al.  Development of mesoscopic polymer gripper system guided by precision design axioms , 2003 .

[5]  G. K. Ananthasuresh,et al.  Design and Fabrication of Microelectromechanical Systems , 1994 .

[6]  T. Hattori.  Achievements of Japanese micromachine projects , 1997, Proceedings of International Solid State Sensors and Actuators Conference (Transducers '97).

[7]  David S. Burnett,et al.  Finite Element Analysis: From Concepts to Applications , 1987 .

[8]  J.-D. Nicoud.  Microengineering: when is small too small? Nanoengineering: when is large too large? , 1995, MHS'95. Proceedings of the Sixth International Symposium on Micro Machine and Human Science.

[9]  Iwao Fujimasa,et al.  Micromachines: A New Era in Mechanical Engineering , 1996 .

[10]  Y. L. Wang,et al.  Integration method for input-output modeling and error analysis of four-bar polymer compliant micromachines , 1999 .

[11]  I. Her,et al.  A Linear Scheme for the Displacement Analysis of Micropositioning Stages with Flexure Hinges , 1994 .

[12]  Larry L. Howell,et al.  A Method for the Design of Compliant Mechanisms With Small-Length Flexural Pivots , 1994 .

[13]  I. M. Ward,et al.  Creep and recovery of ultra high modulus polyethylene , 1981 .