Table of Contents

ABSTRACT

Controlling the rate of heat transfer in the hot strip rolling mill is essential during the cooling process. A state feedback pole placement technique has been proposed for temperature tracking and a control system is designed and simulated. A Single Input-Multiple Output (SIMO) control structure has been investigated for the cooling of a steel plate by impinging air jet. Thermocouple locations embedded on the metal surface were used to formulate the semi-discrete 1-D transient heat conduction control volume problem for the state-space based control model. For the plant validity tests, a general open loop model has been incorporated. Simulation is performed to obtain temperatures inside the plate using a set of ordinary differential equations (ODE) for a single nozzle based on plate surface temperature. Open Loop control is found satisfactory in steel tempering by quenching air jet and might give information for simpler sensor arrangement.

Keywords: Jet Impingement Cooling, SIMO Control, Cooling Rate, State Space Model