Design and Determination of Various Methods of PID Controller for Networked Control Systems

Because of the applications of computer in the current era, a new term known as networked control systems (NCS) is emerged, as these types of systems are affected by several types of time varying delays which is a common computers and communication problem. So, various controllers are adopted to minimize these types of problems. This paper discusses design of various methods of PID controller for NCS. Different types of models are selected for design of controller for simplicity. Firstly, design of conventional P, PI, and PID controllers has been done. Afterwards PID with different types of controllers so that we can see the comparison of conventional PID with other controllers. In optimal design, cost function is an effective element. Thus, minimizing a cost function is a powerful tool, when the system has varying time delays. Comparison of PID controller to the optimal design and fractional methods are given in a case where the process and the controller are scattered over the Internet. MATLAB simulation has been done for various methods in order to show the optimized method. Regardless of the easiness of the PID controller, satisfactory performance is still achieved and it is shown that the above methods are robust in the application of a varying time delay.