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Model following control with discrete time SMC for time-delayed bilateral control systems

Sağlam, Cenk Oğuz and Baran, Eray Abdurrahman and Nergiz, Ahmet Özcan and Şabanoviç, Asif (2011) Model following control with discrete time SMC for time-delayed bilateral control systems. In: IEEE International Conference on Mechatronics (ICM), Istanbul, Turkey

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Official URL: http://dx.doi.org/10.1109/ICMECH.2011.5971262

Abstract

This paper proposes a new algorithm based on model following control to recover the uncompensated slave disturbance on time delayed motion control systems having contact with environment. In the previous works, a modified Communication Disturbance Observer (CDOB) was shown to be successful in ensuring position tracking in free motion under varying time delay. However, experiments show that due to the imperfections in slave plant Disturbance Observer (DOB) when there is rapid change of external force on the slave side, as in the case of environment contact, position tracking is degraded. This paper first analyzes the effect of environment contact for motion control systems with disturbance observers. Following this analysis, a model following controller scheme is proposed to restore the ideal motion on the slave system. A virtual plant is introduced which accepts the current from the master side and determines what the position output would be if there was no environment. Based on the error bet ween actual system and model system, a discrete time sliding mode controller is designed which enforces the real slave system to track the virtual slave output. In other words, convergence of slave position to the master position is achieved even though there is contact with environment. Experimental verification of the proposed control scheme also shows the improvement in slave position tracking under contact forces.

Item Type:Papers in Conference Proceedings
Uncontrolled Keywords:Bilateral control , disturbance observer , motion control , sliding mode control , teleoperation , time delay
Subjects:T Technology > TJ Mechanical engineering and machinery > TJ163.12 Mechatronics
ID Code:17542
Deposited By:Asif Şabanoviç
Deposited On:03 Dec 2011 21:51
Last Modified:03 Dec 2011 21:51

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