Real-time implementation of feed rate active force control of a syringe fluid dispenser

For precise application,it is imperative to provide accurate and stable performance. the feed flow rate of a syringe fluid dispensing system is regulated through a proportional-integral-derivative (pid) and active force control (afc) control scheme that was actuated using a dc servo motor considering a real-time implementation. the focus of this study is to control the speed of a dc motor by implementing an afc strategy in rejecting the disturbance in the system. the afc is implemented by cascading its control loop with the outer pid controller loop to form a two degree-of-freedom (dof) controller. the performance of the proposed pid with afc control scheme was investigated considering both the theoretical simulation and experimental works. the simulation was performed in matlab/simulink computing platform while the real-time experimentation was done by utilising the arduino mega 2560 microcontroller with matlab/simulink driver for the data acquisition,interface and control implementation. the results implies the robustness of the afc-based system in controlling the feed flow rate of the fluid in the dispenser. the best performance is obtained for 100% afc with the disturbance due to vibration almost completely compensated via the proposed scheme in comparison to the pid counterpart. © 2017 penerbit utm press. all rights reserved.