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    Performance enhancement of an uncertain nonlinear medical robot with optimal nonlinear robust controller

    , Article Computers in Biology and Medicine ; Volume 146 , 2022 ; 00104825 (ISSN) Azizi, S ; Soleimani, R ; Ahmadi, M ; Malekan, A ; Abualigah, L ; Dashtiahangar, F ; Sharif University of Technology
    Elsevier Ltd  2022
    Abstract
    So the design and control of an accurate robot for this purpose is very critical for saving the patients. Modification of the model and designing two optimized nonlinear robust controllers for the first time for the parallel manipulator medical robot and cardiopulmonary resuscitation. The main objective of the current study in order to decrease the overshoot and increase the accuracy of the position and convergence speed and robustness to destructive factors affecting the precision of the robot. In this paper firstly, the kinematics and dynamics analysis of a translational parallel manipulator robot is presented and a non-linear model in the presence of uncertainties, disturbances, and... 

    Design of an H∞, PID controller using particle swarm optimization

    , Article International Journal of Control, Automation and Systems ; Volume 7, Issue 2 , 2009 , Pages 273-280 ; 15986446 (ISSN) Zamani, M ; Sadati, N ; Ghartemani, M. K ; Sharif University of Technology
    2009
    Abstract
    This paper proposes a novel method to designing an H∞ PID controller with robust stability and disturbance attenuation. This method uses particle swarm optimization algorithm to minimize a cost function subject to-norm to design robust performance PID controller. We propose two cost functions to design of a multiple-input, multiple-output (MIMO) and single-input, single-output (SISO) robust performance PID controller. We apply this method to a SISO flexible-link manipulator and a MIMO super maneuverable F18/HARV fighter aircraft system as two challenging examples to illustrate the design procedure and to verify performance of the proposed PID controller design methodology. It is shown with...