Designing type-2 fuzzy logic system controllers via fuzzy Lyapunov synthesis for the output regulator of a servomechanism with nonlinear backlash

  • Authors:
  • Nohe R. Cazares-Castro;Luis T. Aguilar;Oscar Castillo

  • Affiliations:
  • Facultad de Ciencias Quimicas e Ingenieria, Universidad Autonoma de Baja California, Tijuana, México;Centro de Investigación y Desarrollo de Tecnologia Digital, Instituto Politécnico Nacional, Tijuana, México;Instituto Tecnologico de Tijuana, Tijuana, México

  • Venue:
  • SMC'09 Proceedings of the 2009 IEEE international conference on Systems, Man and Cybernetics
  • Year:
  • 2009

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Abstract

Fuzzy Lyapunov Synthesis is extended to the design of Type-2 Fuzzy Logic System Controllers for the output regulation problem for a servomechanism with nonlinear backlash. The problem in question is to design a feedback controller so as to obtain the closed-loop system in which all trajectories are bounded and the load of the driver is regulated to a desired position while also attenuating the influence of external disturbances. The servomotor position is the only measurement available for feedback; the proposed extension is far from trivial because of nonminimum phase properties of the system. Performance issues of the Type-2 Fuzzy Logic Regulator constructed are illustrated in a simulation study.