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Comparison of PID Controllers by Using Linear and Nonlinear Models for Control of Mobile Robot Driving System
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 Title & Authors
Comparison of PID Controllers by Using Linear and Nonlinear Models for Control of Mobile Robot Driving System
Jang, Tae Ho; Kim, Youngshik; Kim, Hyeontae;
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In this study, we conduct linear and nonlinear modeling of the DC motor driving system of a wheeled mobile robot, which is a nonlinear system involving dead zone, friction, and saturation. The DC motor driving system consists of a DC motor, a wheel, and gears. A linear DC motor driving system is modeled using a steady-state response and parameter measurements. A nonlinear DC motor driving model is identified with the use of the Hammerstein-Wiener method. By using these models, PID controllers for the DC motor system are then established. Each PID controller is applied as a low-level controller in order to achieve posture stabilization control for the real mobile robot. We also compare the performance of the proposed PID controllers in posture stabilization experiments by using several different final robot postures.
DC motor driving part;System identification;Linear and nonlinear system modeling;Posture stabilization control;
 Cited by
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