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Adaptive neural network control of bilateral teleoperation with constant time delay

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Abstract

This paper proposes a novel approach for bilateral teleoperation systems with a multi degrees-of-freedom (DOF) nonlinear robotic system on the master and slave side with constant time delay in a communication channel. We extend the passivity based architecture to improve position and force tracking and consequently transparency in the face of offset in initial conditions, environmental contacts and unknown parameters such as friction coefficients. The proposed controller employs a stable neural network on each side to approximate unknown nonlinear functions in the robot dynamics, thereby overcoming some limitations of conventional controllers such as PD or adaptive controllers and guaranteeing good tracking performance. Moreover, we show that this new neural network controller preserves the control passivity of the system. Simulation results show that NN controller tracking performance is superior to that of conventional controllers.

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Authors and Affiliations

  1. Department of Electrical Engineering, Science and Research Branch, Islamic Azad University, Tehran, Iran

    A. Forouzantabar

  2. Department of Electrical Engineering, AmirKabir University of Technology, Tehran, Iran

    H. A. Talebi

  3. Department of Electrical Engineering, Khaje Nasir Toosi University of Technology, Tehran, Iran

    A. K. Sedigh

Authors
  1. A. Forouzantabar
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  2. H. A. Talebi
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  3. A. K. Sedigh
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Correspondence to A. Forouzantabar.

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Forouzantabar, A., Talebi, H.A. & Sedigh, A.K. Adaptive neural network control of bilateral teleoperation with constant time delay. Nonlinear Dyn 67, 1123–1134 (2012). https://doi.org/10.1007/s11071-011-0057-8

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  • DOI: https://doi.org/10.1007/s11071-011-0057-8

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