連続型抵抗加熱炉の制御特性分析

概要

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For an electric resistance vacuum furnace of continuous-type used for high temperature sintering process of new ceramic materials, a controlling problem is studied based on both simulation and optimization methods. With the object of analyzing dynamics of the controlled system, a dynamic simulation model is first developed by investigating the heat transfer phenomenon in each small cell of the furnace. The heat transfer within the furnace is governed mainly by the heat radiation phenomenon, and the simulation model obtained includes relationship with strong nonlinearlity. Based on this model, a designing problem of PID controller is formulated as a nonlinear optimization problem. A solving method is proposed here by combining both the Runge-Kutta method and the generalized reduced gradient algorithm. Through a numerical calculation, it is ascertained that the temperature of the heated material at each cell can be controlled by the PID controller determined here.
1987-11-15