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Low-Speed Control of Heavy-Load Transfer Robot with Long Telescopic Boom Based on Stribeck Friction Model

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  • Bo You
  • Ming Qiao
  • Jiazhong Xu
  • Dan Liu

Abstract

The severe low-speed creep phenomenon occurs in the telescopic boom system of a heavy-load transfer robot with a long telescopic boom as a result of nonlinear friction. In order to improve control precision and operation performance at low speeds, we built a three-loop control nonlinear model of an AC servo motor with Stribeck friction disturbance. Traditional proportional-integral-derivative controller (PID) and fuzzy PID controls were, respectively, adopted in the position loop, and the control performance was simulated. The results showed that a system with fuzzy PID control eliminates “flat top” position tracking and “dead zone” speed tracking, which are generated by traditional PID, and thereby decreases the effect of friction on the performance of the servo system. This elimination also improved the tracking accuracy and robustness of the system.

Suggested Citation

  • Bo You & Ming Qiao & Jiazhong Xu & Dan Liu, 2012. "Low-Speed Control of Heavy-Load Transfer Robot with Long Telescopic Boom Based on Stribeck Friction Model," Mathematical Problems in Engineering, Hindawi, vol. 2012, pages 1-12, December.
    • Handle: RePEc:hin:jnlmpe:432129
    DOI: 10.1155/2012/432129
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