Evaluating the Effect of Real-Time Communication Errors on Remote Servo DC-Motor Control Performance

This paper presents a review and performance evaluation of a DC-servomotor control loop that is set up based on three different types of real-time-based communications.The aim is to illustrate the effectiveness of communication errors such as sample loss, network latency, and bandwidth on the controlled signal and how the transient response may degrade according to such errors.The control performance is evaluated for three types of communication in a local area network, which are CAN, Ethernet, and switched Ethernet.The loop of the control process is simulated by using a MATLAB/Simulink® based simulator for real-time control systems.The closed-loop control system of the DCservomotor is realized with the help of a discrete-time proportional differential controller.As a result of doing this, a threshold can be found which outlines the limits of the real-time-based communication network in which the performance of the DC-servomotor remains stable.Through a detailed discussion, the type of networked control method that can be used for improving the quality of performance is recommended.The performance is judged through the comparison of process response plots side-by-side and makes denotative statements about which real-time-based communication can give a better result based on peak overshoot ratio and settling time.