The aim of this study is to examine the robust control design based on coefficient diagram method with backstepping control combined with an observer for position control of the flexible joint manipulator. A simulation model with stability analysis was established where the parameters of the observer-controller are tuned by means of particle swarm optimization. Through this study, it was found that the proposed control scheme is effective, and the results indicate that ours approach ensures the asymptotic convergence of the actual joints positions to theirs desired trajectory, and robustness where the system is subjected to external disturbance and parameters uncertainties.
flexible robot, backstepping control, coefficient diagram method, nonlinear observer, particle swarm optimization
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