Parabolic and hyperbolic flexure hinges: flexibility, motion precision and stress characterization based on compliance closed-form equations
2002; Elsevier BV; Volume: 26; Issue: 2 Linguagem: Inglês
10.1016/s0141-6359(01)00108-8
ISSN1873-2372
AutoresNicolae Lobontiu, Jeffrey S. N. Paine, Edward O’Malley, Marc N. Samuelson,
Tópico(s)Force Microscopy Techniques and Applications
ResumoThe parabolic and hyperbolic flexure hinges are introduced as new rotation joints to be utilized in two-dimensional monolithic mechanisms. Closed-form equations are formulated for compliances to characterize both the active rotation and all other in- and out-of-plane parasitic motions. The stress levels are also evaluated in terms of compliances. Checked against finite element analysis and experimental measurement data, the model predictions are within 8% error margins. Further simulation is performed to compare geometrically-equivalent parabolic and hyperbolic flexure hinges. The results indicate that the parabolic flexures are more rotation-compliant and induce less stress, while the hyperbolic flexures are less sensitive to parasitic effects.
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