Pole-placement control for pneumatic positioning system

Mohd Jomli, Nur Ain (2021) Pole-placement control for pneumatic positioning system. Project Report. Universiti Teknikal Malaysia Melaka, Melaka, Malaysia. (Submitted)

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Abstract

Controlling a pneumatic positioning system especially in terms of its accuracy, stability, and good transient response is very challenging due to the nonlinearities issue. Therefore, a pole-placement controller based on second-order Auto-Regressive with eXogenous input (ARX) model was proposed as a new control strategy to control the pneumatic positioning system. Pole-placement controller is chosen since it has the ability to guarantee stable closed-loop system performance. In this study, a mathematical model of the pneumatic system, which is the second-order ARX was determined using system identification technique. To evaluate the effectiveness of the pole-placement controller, the positioning response performance of the poleplacement controller was compared with the Proportional-Integral-Derivative (PID) controller. The simulation result based on MATLAB Simulink for positioning control of 100 mm distance shows that the control strategy using pole-placement effectively provide the pneumatic positioning response with 0 % of overshoot, compared to PID which produced >50 % of overshoot. Overall, the findings based on the transient response performances confirmed that the proposed pole-placement control strategy was proven accurate and stable to control the position of the pneumatic system used in this study. Hence, indicates that the control strategy using pole-placement is very effective and can be applied in industrial application.

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