Simulation and realization for WINCC predictive PID control based on and PLC
Abstract：Due to the strong coupling of resistance heating water cooling laboratory decoupling control devices, the conventional PID control is difficult to have good results. This paper uses a generalized predictive PID cascade control based on changing the system model on line by using the recursive least squares method. Through the inner loop PID action, it changes a chronic system into a better control object with dynamic performance, and then enhance the system＇s adaptability and the interference immunity to the coupled interference through the outer loop predictive control optimization capabilities. Through MATLAB simulation, it verified the feasibility of predictive PID control algorithm. For the simulation that does not accurately reflect the control of the real situation, this article realizes the prediction PID cascade control by writing the predictive control program in WINCC script, and by writing the PID control algorithm in PLC and then by communicating them to achieve the predictive PID cascade control. Experimental results show that the predictive PID control has a better adaptability to the time-varying control object, comparing with PID control, and a better stable performance to the interference of the coupled system.
Keywords：PIDrecursive least Squares methodWINCCS7300
Publication Date：2012-01-01
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：6( 453-458 )