Stability of Networked Control System (NCS) with discrete time-driven PID controllers

• NCS has been represented in this paper as a switched system model.
• PID controller design using the concepts of lifting.
• LMI based methodology to design controller with memory to control a plant over a network with jitter and/or data-loss has been proposed.
• The methodology has been demonstrated with credible online simulation and has been compared with offline results.

This paper presents a practical methodology to analyze the stability of a control loop consisting of a continuous time plant and a discrete PID controller connected as a NCS. With this methodology, it is possible to extend useful modern techniques like lifting systems developed for memory-less controllers to cover practical control loops. The methodology is demonstrated with a real-time simulation of a representative system, using a NCS test bench.