A time-delay control algorithm for an industrial electric heater

This paper discusses stabilizing control for discrete systems with a time delay in the state variables. The control algorithms are based on the Lyapunov stability theory. For an industrial electric heater, a time-delay discrete model is identified using a recursive least squares technique, and real-time control via the proposed control algorithm to the heater is performed. The performance of the industrial application shows that the temperature variation in the heater is within ± 1.5°C (0.5%), and the system has good load change rejection and shorter recovery time.