A Flexible Arm Manipulator Control System Using Modified Discrete Sliding mode Model Following Controller with Sinusoidal Command Input

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Ntapat Worapongpat
Phongsak Phakamach
Udomvit Chaisakulkiat

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A Modified Discrete Sliding mode Model Following Control or MDSMFC design methodology for a flexible arm manipulator is presented. The MDSMFC algorithm uses the combination of an adaptive model following control and sliding mode control to improve the dynamics response for command tracking. A procedure is proposed for choosing the control function so that it guarantee the existence of a sliding mode and the nominal system stable in the absence of system uncertainties and disturbances. The MDSMFC approach has been simulated and applied to a position control of a tip of a single flexible link with sinusoidal command input. Simulation results showed that the MDSMFC gives a significant improvement on the tracking performances and robust to plant parameter variations and disturbances.

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