| The thesis studies the plant of temperature. Firstly, the system is designed and realized. Then the characteristics of temperature of plant are analyzed in all details from thermodynamics. The approximate mathematics model of temperature plant with one order and dead time is reduced and the meaning of every parameter of this model are expressed, which is used often and practically, in the paper. In addition to this, we identify the model of the system and the result demonstrated the method is effective for it.Secondly, we analyzed advantages and disadvantages of present control method of temperature. One kind of improved Fuzzy-Dahlin control method is presented for temperature plant with long dead time and non-linearity. The Dahlin control method, the fuzzy control method are combined in this improved method. It is demonstrated by digital simulation that the improved Fuzzy-Dahlin makes the extra-regulation more small(even zero), the regulation time more short, and the robustness better for the temperature controlled plant. It is demonstrated by physical experimentation that improved Fuzzy-Dahlin method presented in this paper is effective for temperature plant with dead time and non-linearity.The control software is compiled with visual C++ and matlab. It's easy to use and friendly to the interface of person and machine on the basis of window2000/xp platform. There are some functions as modify sample time or modify controller's parameters on line, display and copy data of temperature curve, and so on. The control hardware is easy to use and its functions are self-contained.
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