Abstract: This article studies the effect of the interference on the furnace temperature fluctuation in the SCR temperature control system at a lesser lag. The mathematical expressions of the furnace temperature fluctuation are derived, and the relationship between the furnace temperature fluctuation and the system parameters is analyzed. Then a comparison is made with the experimental results. It is hoped, that in this way, we can provide a theoretical basis for improving the precision of the temperature control system.

Key words: expression of the furnace temperature fluctuation, SCR temperature control system, precision of temperature control