An exponentially stable variable structure controller is presented for regulation of the angular displacement of a one-link flexible robot arm, while simultaneously stabilizing vibration transient in the arm. By properly selecting the sliding hyperplane, the governing equations which form a nonhomogenous boundary value problem are converted to homogenous ones, and hence, analytically solvable. The controller is then designed based on the original infinite dimensional distributed system which, in turn, removes some disadvantages associated with the truncated-model-base controllers. Utilizing only the arm base angular position and tip deflection measurements, an on-line perturbation estimation routine is introduced to overcome the measurement imperfections and ever-present unmodeled dynamics. Depending on the composition of the controller, some favorable features appear such as elimination of control spillovers, controller convergence at finite time, suppression of residual oscillations and simplicity of the control implementation. Numerical simulations along with experimental results are provided to demonstrate and validate the effectiveness of the proposed controller.
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December 2001
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An Infinite Dimensional Distributed Base Controller for Regulation of Flexible Robot Arms
Nader Jalili, Associate Mem. ASME, Assistant Professor
Nader Jalili, Associate Mem. ASME, Assistant Professor
Robotics and Mechatronics Laboratory, Department of Mechanical Engineering, Clemson University, Clemson, SC 29634-0921
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Nader Jalili, Associate Mem. ASME, Assistant Professor
Robotics and Mechatronics Laboratory, Department of Mechanical Engineering, Clemson University, Clemson, SC 29634-0921
Contributed by the Dynamic Systems and Control Division of THE AMERICAN SOCIETY OF MECHANICAL ENGINEERS. Manuscript Received by the Dynamics Systems and Control Division March 27, 2000. Associate Editor: C. Rahn.
J. Dyn. Sys., Meas., Control. Dec 2001, 123(4): 712-719 (8 pages)
Published Online: March 27, 2000
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Received:
March 27, 2000
Citation
Jalili , N. (March 27, 2000). "An Infinite Dimensional Distributed Base Controller for Regulation of Flexible Robot Arms ." ASME. J. Dyn. Sys., Meas., Control. December 2001; 123(4): 712–719. https://doi.org/10.1115/1.1408608
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