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A new method to design fuzzy controller for unmanned autonomous forklift

  • Guofei Li
  • , Xin Wang
  • , Jian Yang
  • , Bin Wang
  • Harbin Institute of Technology Shenzhen
  • General Manager of LIZI Robot CO. LTD

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

Abstract

This paper proposes a new method called Lyapunov-Conjugate Gradient Method (LCGM) to design fuzzy controller for unmanned autonomous forklift. The kinematic of a spin-turn mechanism is analyzed first, and then the design parameters are obtained. Based on the kinematic and the fuzzy Lyapunov synthesis proposed by Margaliot, we introduce the error weights coefficients to Lyapunov Function (LF) and derive the stable conditions. The fuzzy rule-bases are given. Next we design and optimize parameters of the Gaussian membership function by the Conjugate Gradient method. The smoother control surfaces are analyzed. Experiment results show that the type-1 controller designed by LCGM has a better performance in stability, smooth and robustness than commonly used conventional fuzzy-PID controller. Its steady lateral error and orientation error can be less than 10mm and 1 degree, respectively. A lot of unmanned forklifts that their controllers are designed by LCGM have been used in automatic plants.

Original languageEnglish
Title of host publication2015 IEEE International Conference on Robotics and Biomimetics, IEEE-ROBIO 2015
PublisherInstitute of Electrical and Electronics Engineers Inc.
Pages946-951
Number of pages6
ISBN (Electronic)9781467396745
DOIs
StatePublished - 2015
Externally publishedYes
EventIEEE International Conference on Robotics and Biomimetics, IEEE-ROBIO 2015 - Zhuhai, China
Duration: 6 Dec 20159 Dec 2015

Publication series

Name2015 IEEE International Conference on Robotics and Biomimetics, IEEE-ROBIO 2015

Conference

ConferenceIEEE International Conference on Robotics and Biomimetics, IEEE-ROBIO 2015
Country/TerritoryChina
CityZhuhai
Period6/12/159/12/15

Keywords

  • Lyapunov Conjugate Gradient
  • fuzzy controller
  • kinematic
  • membership function
  • unmanned forklift

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