Study Of Advanced Pid Algorithm And Their Application In The Temperature Control System Of Open Cup Flash Point Apparatus

Open cup flash point of petroleum is an important indicator under the condition of the use, storage and transport, which is used for the identification of oil and other flammable liquids. The measured accuracy of flash point value plays important safety significance in the use of petroleum products, storage and transportation. As the open cup flash point temperature control system with nonlinear, large inertia and large delay time-varying characteristics, most of flash point apparatus's control accuracy is not high on the market at present, especially in the 28 degrees before default flash point.In this paper, there are simulations of advanced PID algorithm and its application in the temperature control system of open cup flash point apparatus. First of all, elaborated the principle work of open cup flash point apparatus's temperature control system; temperature control system model is identified by using least squares identification with a typical step signal. Secondly, based on the system model have made comparison of simulation in simulink of Matlab using internal model PID, fuzzy self-tuning PID, neuron PID plus Smith predictor under model matching and model mismatch. Through the contrast research, internal model PID have the best control effect.Again, designed flash point apparatus temperature control system hardware schematics, made PCB boards and bought related components to complete the hardware installation. Finally, designed temperature control system of open cup flash point apparatous flowchart, using C language programming of the algorithm is optimized.