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International Journal of Intelligent Systems and Applications(IJISA)

ISSN: 2074-904X (Print), ISSN: 2074-9058 (Online)

Published By: MECS Press

IJISA Vol.5, No.10, Sep. 2013

Design Novel Soft Computing Backstepping Controller with Application to Nonlinear Dynamic Uncertain System

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Author(s)

Amin Jalali, Farzin Piltan, Hossein Hashemzadeh, Alireza Hasiri, Mohammadreza Hashemzadeh

Index Terms

Backstepping Methodology, Fuzzy Logic Algorithm, Continuum Robot Manipulator, Uncertainty

Abstract

The increasing demand for multi-degree-of-freedom (DOF) continuum robot in presence of highly nonlinear dynamic parameters in a number of industries has motivated a flurry of research in the development of soft computing nonlinear methodology. This robot is capable of providing smooth and isotropic three-dimensional motion in each joint. Compared to conventional robotic manipulators that offer the same motion capabilities, the innovative spherical motor possesses several advantages. Not only can the spherical motor combine 3-DOF motion in a single joint, it has a large range of motion with no singularities in its workspace. This research contributes to the on-going research effort by exploring alternate methods for controlling the continuum robot manipulator. This research addresses two basic issues related to the control of a continuum robots; (1) a more accurate representation of the dynamic model of an existing prototype, and (2) the design of a robust feedback controller. The robust backstepping controller proposed in this research is used to further demonstrate the appealing features exhibited by the continuum robot. Robust feedback controller is used to position control of continuum robot in presence of uncertainties. Using Lyapunov type stability arguments, a robust backstepping controller is designed to achieve this objective. The controller developed in this research is designed in two steps. Firstly, a robust stabilizing torque is designed for the nominal continuum robot dynamics derived using the constrained Lagrangian formulation. Next, the fuzzy logic methodology applied to it to solution uncertainty problem. The fuzzy model free problem is formulated to minimize the nonlinear formulation of continuum robot. The eventual stability of the controller depends on the torque generating capabilities of the continuum robots.

Cite This Paper

Amin Jalali, Farzin Piltan, Hossein Hashemzadeh, Alireza Hasiri, Mohammadreza Hashemzadeh,"Design Novel Soft Computing Backstepping Controller with Application to Nonlinear Dynamic Uncertain System", IJISA, vol.5, no.10, pp.93-105, 2013.DOI: 10.5815/ijisa.2013.10.12

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