Multi-loop control of temperature for TV glass furnace

Presents a practical application of the conventional multi-loop control method for the temperature control of a television glass furnace. To control the temperature of the TV glass furnace, major input-output variables are selected, and simple first-order-plus-dead-time (FOPDT) models are established with the process experimental data. Based on the FOPDT models, a multi-loop control, which is a combination of cascade and single loops, is used. Practical implementation using a distributed control system showed satisfactory results of the proposed control algorithm for the 150-ton/day-production furnace.