凸輪控制式行星齒輪系為具有凸輪對的行星齒輪系,主要特點是可以產生大範圍的變轉速輸出。本研究之目的在於提出凸輪控制式行星齒輪系機械效率之分析與改善方法,以進行機械效率之提升。首先,進行運動靜力分析,以探討機件間之作用力、搖撼力、凸輪壓力角、摩擦力矩、摩擦損失功率、及機械效率。然後,進行實驗量測,以驗證所提理論模式之正確性。最後,應用田口法進行參數最佳化,以改善機械效率,並由變異分析計算各因子的信心水準,找出對機械效率影響較大的因子。由結果顯示,所提機械效率之理論分析模式與實驗結果極為接近,而參數最佳化結果可進一步提升機械效率。
Cam-controlled planetary gear trains (CCPGTs) are planetary gear trains with cam pairs. One of its main advantages is that it can generate a wide range of non-uniform speed. This work aims to propose the approaches of analysis and improvement for the mechanical efficiency of cam-controlled planetary gear trains. Firstly, the theoretical model of kinetostatic analysis is presented, and the applied forces, shaking forces, friction moments, and mechanical efficiency are found by the model. Then, an experimental system is built, and an experiment is conducted to verify the proposed theoretical model. Moreover, the optimum parameters for upgrading the mechanical efficiency are found by Taguchi method. Finally, the extent of influence on mechanical efficiency is examined by the confidence level of parameters. The result shows that the mechanical efficiencies obtained by the experiment and the proposed model agree well with each other, therefore the proposed model is feasible. In addition, the mechanical efficiency is further upgraded by optimization of Taguchi method.