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http://dx.doi.org/10.5302/J.ICROS.2007.13.4.335

An Observer Design and Compensation of the Friction in an Inverted Pendulum using Adaptive Fuzzy Basis Functions Expansion  

Park, Duck-Gee (아주대학교 전자공학과)
Park, Min-Ho (아주대학교 전자공학과)
Chwa, Dong-Kyoung (아주대학교 전자공학과)
Hong, Suk-Kyo (아주대학교 전자공학과)
Publication Information
Journal of Institute of Control, Robotics and Systems / v.13, no.4, 2007 , pp. 335-343 More about this Journal
Abstract
This paper deals with the method to estimate the friction in a system. We study a nonlinear friction model to estimate the friction in an inverted pendulum and approximate the friction model using fuzzy basis functions expansion. To demonstrate the friction observer using FBFs, we derive a update rule based on the error term that is formed by the output from a real system and observer output with a friction estimate. And two compensation algorithms to improve the response of an inverted pendulum are proposed. The first method that a observer parameter is updated in on-line and the friction is compensated at the same time. The second method is to compensate the friction with observer parameter estimated priori. The two methods is compared through the experimental results.
Keywords
friction observer; fuzzy basis functions; adaptive observer; inverted pendulum;
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