The Research Of PID Controller Parameter Tuning Methods And Applid

As a classical control method, from birth until now, after several decades of development and improvement, PID has been the most widespread controller in the industrial automation domain because of the fine performance. PID controller is simple in structure, adaptable, does not depend on the precise model of the object, the advantages of strong robustness, Its control performance is directly related to the production process smooth and efficient operation , Therefore, PID controller design and parameter tuning problems with the theory of value not only of great practical significance.In this paper, in-depth study of the PID control theory and re-analysis of the PID controller's control mechanism, in this Review and analysis of the basis of several existing conventional method of PID parameter tuning. In accordance with the simple, efficient and intuitive parameter tuning principle, Improved several parameters of the PID controller auto-tuning algorithm, is given a detailed derivation of the formula and select the model has done a simulation experiment.Step to identify the parameters based on self-tuning algorithm is to obtain through the course of the experimental step response of the dynamic characteristics of the object, Identify high and low precision approximation model, and gives examples of the corresponding simulation. Studied in detail and then relay feedback based on the PID parameter tuning methods, and improved algorithms, System by calculating the gain and the critical cases of critical oscillation period, the application of these two variable design parameters of a given based on the amplitude and phase angle margin of the PID controller, The method is simple and less when applied to high-end systems ,also with very good results. Control process as a result of the uncertainties, especially about the present more advanced intelligent PID control, an analysis of how best to achieve the parameters of the adaptive and on-line amendment to the strengths and weaknesses , the analysis and simulation results than the right.Finally, a comprehensive strategy based on intelligent PID control method to control electric heating furnace temperature target, temperature control procedures designed to process, validate the advantages and disadvantages of such an integrated approach, simulation and analysis of the example Fig.