|
| Parameters identification for LuGre friction model based on modified chain code recognition method |
| Received:October 29, 2010 Revised:April 25, 2011 |
| View Full Text View/Add Comment Download reader |
| DOI：10.7511/jslx20122022 |
| KeyWord:modified chain code parameter recognition LuGre friction model image match shape characteristic identification |
| Author | Institution |
| 刘柏希 |
湘潭大学 机械工程学院, 湘潭 |
|
| Hits: 2662 |
| Download times: 1583 |
| Abstract: |
| Aimed at the shortcoming of traditional parameters identification methods for LuGre friction model,a new parameters identification method based on genetic algorithms and modified chain code recognition method was presented.Firstly,LuGre friction model was briefly introduced.Secondly,the optimization objective function with measured and simulated friction force in stead state was established.Thirdly,the relationships among displacement-friction force curve in presliding regime,stiffness coefficient and damping coefficient of LuGre friction model were studied.Many displacement-friction force curves with different shape were simulated using different stiffness coefficients.The shape characteristics of those simulated displacement-friction force curves were extracted using modified chain code and Fourier descriptor.The Euclidean distance based on shape characteristics was employed as the measurement of similar degree between measured displacement-friction force curves and simulated displacement-friction force curves.When the distance is less than the given error,the corresponding stiffness coefficient of simulated displacement-friction force curve is regarded as the true one.In the end,a numerical example was given to show the correctness and effectiveness of the presented method. |
|
|
|