| The dynamic Performance of sine mechanism is very important to improve it’s work performance. In this thesis, to acquire dynamic modelling of the sine mechanism considering nonlinear factors influence, the band graph modeling method based on the conservation of energy for analysis is developed.This thesis explored the switch band graph to apply in mechanism dynamic modeling with the influence of discontinuous characteristic factors. First, summarized the application and research of the sine mechanism to present situation, and current state of the band graph modeling theory research. Through literature review to discover that sine mechanism reverses are non-smooth and non-continuous about impacts,and produces non-pure sine curve.Considering the subsection characteristics of the slider friction,we take the junction structure of power. The friction is divided into four states, established a non-continuous bond graph model of friction. Finally,bond graph dynamics modeling is built considering the friction and juxtaposition metamorphosis of crankpin roller.We use20-sim simulation software simulating the model, and the results are consist to the ADAMS simulate. We study that friction and elastic deformation of contacts caused non-continuous accompanying impacts when sine mechanism reverses。In order to verify validity of bond graph model,we obtained the dynamic analysis of this institution with the traditional Newtonian mechanics.State equations from two kinds of modeling method are consistent. Compared with the traditional modeling method, the band graph model more simplicity.Through assembling a set of sine mechanism dynamic experiment device,we test the movement characteristics of sine mechanism. Experiment results show theoretical calculation is correct and effective. |
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