Reducing undesirable vibrations of planar linkage mechanism with joint clearance
| Autor: | Zheng Feng Bai, Fei Li, Ji Jun Zhao, Yang Zhao, Xin Jiang |
|---|---|
| Rok vydání: | 2018 |
| Předmět: |
0209 industrial biotechnology
Materials science Mechanical Engineering 02 engineering and technology Mechanics Linkage (mechanical) Contact force law.invention Mechanism (engineering) Vibration Acceleration 020303 mechanical engineering & transports 020901 industrial engineering & automation 0203 mechanical engineering Mechanics of Materials law Dynamical friction Impact Reduction (mathematics) |
| Zdroj: | Journal of Mechanical Science and Technology. 32:559-565 |
| ISSN: | 1976-3824 1738-494X |
| Popis: | An optimization design method is presented to reduce the undesirable vibrations caused by clearance for planar linkage mechanism. A clearance joint is defined and considered a contact/impact force constraint. Contact and impact force models for the clearance joint are established using a normal contact force model based on Hertz model with energy loss and a tangential friction model based on modified Coulomb model with dynamic friction coefficient, respectively. In view of the clearance joint, dynamic equations and optimization method for a planar four-bar mechanism are then presented as an application example. The optimization aims to minimize the maximum absolute acceleration peaks of the mechanism by determining the link lengths of the planar linkage mechanism. Finally, the optimization design is solved by a generalized reduced gradient algorithm. Results show evident decrease in vibration peaks of the mechanism and obvious reduction in the contact forces in the clearance joint, which contribute to a good performance of planar linkage mechanism systems. |
| Databáze: | OpenAIRE |
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