TRANSPORTATION DELAY ESTIMATION FOR CONTROL SYSTEM AND ITS IMPACT ON CONTROLLER PERFORMANCE

A control system is used to monitor certain parameters of a physical plant or a process in order to keep the whole plant under control. Sensors carry out measurement for such parameters and provide this information to the controller. A controller compares a sensor sample with a set point value of the parameter to be controlled, estimates error, and finally takes a control action based on the magnitude of the error. The output of the controller is fed to the actuator. The actuator executes command received from the controller. In earlier systems, point to point connection between a controller, sensor and actuator was used. In contemporary control systems, these components are connected together by a communication channel or bus. The aim of this research work is to carry out analytical analysis of the effect of transportation delay on the performance of a networked controller (CAN bus for communication) and also verify the same using MATLAB simulation.