A new fuzzy controller for stabilization of parallel-type double inverted pendulum system

  • Authors:
  • Jianqiang Yi;Naoyoshi Yubazaki;Kaoru Hirota

  • Affiliations:
  • Laboratory of Complex System and Intelligent Science, Institute of Automation, Chinese Academy of Sciences, Beijing 100080, People's Republic of China;Technology Research Center, Mycom, Inc., 12, S. Shimobano, Saga Hirosawa, Ukyo, Kyoto 616-8303, Japan;Interdisciplinary Graduate School of Science and Engineering, Tokyo Institute of Technology, 4259 Nagatsuta, Midori, Yokohama 226-8502, Japan

  • Venue:
  • Fuzzy Sets and Systems
  • Year:
  • 2002

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Abstract

A new fuzzy controller with 6 input items and 1 output item for stabilizing a parallel-type double inverted pendulum system is presented based on the single input rule modules (SIRMs) dynamically connected fuzzy inference model. Each input item is assigned with a SIRM and a dynamic importance degree. The SIRMs and the dynamic importance degrees are designed such that the angular control of the longer pendulum takes the highest priority over the angular control of the shorter pendulum and the position control of the cart when the angle of the longer pendulum is big. By using the SIRMs and the dynamic importance degrees, the priority orders of the three controls are automatically adjusted according to control situations. The proposed fuzzy controller has a simple and intuitively understandable structure, and executes the three controls entirely in parallel. Simulation results show that the proposed fuzzy controller can stabilize completely a parallel-type double inverted pendulum system within 10.0 s for a wide range of the initial angles of the two pendulums. This is the first result for a fuzzy controller to achieve successfully complete stabilization control of a parallel-type double inverted pendulum system.