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A Novel Method of Robust Trajectory Linearization Control Based on Disturbance Rejection

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  • Xingling Shao
  • Honglun Wang

Abstract

A novel method of robust trajectory linearization control for a class of nonlinear systems with uncertainties based on disturbance rejection is proposed. Firstly, on the basis of trajectory linearization control (TLC) method, a feedback linearization based control law is designed to transform the original tracking error dynamics to the canonical integral-chain form. To address the issue of reducing the influence made by uncertainties, with tracking error as input, linear extended state observer (LESO) is constructed to estimate the tracking error vector, as well as the uncertainties in an integrated manner. Meanwhile, the boundedness of the estimated error is investigated by theoretical analysis. In addition, decoupled controller (which has the characteristic of well-tuning and simple form) based on LESO is synthesized to realize the output tracking for closed-loop system. The closed-loop stability of the system under the proposed LESO-based control structure is established. Also, simulation results are presented to illustrate the effectiveness of the control strategy.

Suggested Citation

  • Xingling Shao & Honglun Wang, 2014. "A Novel Method of Robust Trajectory Linearization Control Based on Disturbance Rejection," Mathematical Problems in Engineering, Hindawi, vol. 2014, pages 1-10, April.
    • Handle: RePEc:hin:jnlmpe:129247
    DOI: 10.1155/2014/129247
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