| 研究生: |
范惠晴 Fan, Hui-Ching |
|---|---|
| 論文名稱: |
變轉速平板凸輪機構滾子從動件動力特性改善設計 On the Improvement Design of Dynamic Characteristics for the Roller Follower of a Variable-Speed Plate Cam Mechanism |
| 指導教授: |
顏鴻森
Yan, Hong-Sen |
| 學位類別: |
碩士 Master |
| 系所名稱: |
工學院 - 機械工程學系 Department of Mechanical Engineering |
| 論文出版年: | 2010 |
| 畢業學年度: | 98 |
| 語文別: | 中文 |
| 論文頁數: | 80 |
| 中文關鍵詞: | 凸輪機構 、變轉速機構 、運動設計 、動力設計 、最佳設計 |
| 外文關鍵詞: | cam mechanism, variable input speed, kinematic design, dynamic design, optimal design |
| 相關次數: | 點閱:142 下載:3 |
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本研究藉由凸輪轉速的設計,彈性調整輸出合適的從動件運動與動力特性,進而改善從動件的動力特性。首先介紹Bezier 作為凸輪轉速函數,並探討其運動連續性,以建立轉速軌跡表示方法。接著推導平板凸輪機構輸入與輸出的運動特性,以及最佳化方法。再者,發展改善輸出運動特性及調整輸出運動的設計方法,並介紹彈性凸輪-從動件系統的單自由度動力模型,對此模型作分析得到運動方程式,進一步對運動與動力特性進行改善,並以設計實例說明設計過程與進行結果討論。最後,以軟體模擬本研究的運動與動力模型,驗證本理論是正確的。
Without modifying the cam contour, a cam mechanism with variable input speed trajectory offers an alternative solution to flexibly achieve kinematic and dynamic characteristics, and then lower the follower’s residual vibration. Firstly, the speed trajectory of cam is derived by employing Bezier curve, and motion continuity conditions are investigated. Then the motion characteristics between the plate cam and the roller follower are derived. The kinematic design method is studied to develop the models for output motion characteristic refinement and output motion adjustment. To analyze the residual vibration, the single DOF dynamic model of the elastic cam-follower system is introduced. Based on the motion equation derived from the dynamic model, the residual vibration of the follower is yielded. The design procedure to improve the kinematic and dynamic motion characteristics is presented and design
examples with discussions are provided. Finally, the simulations of the kinematic and dynamic models by ADAMS are carried out to verify that the design models as well as the performances of variable plate cam mechanism are feasible.
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