Abstract
Predictive control is regarded as the most promising and advanced control algorithm Many big companies have embedded it into control system software and applied in some large-seale process control system However, predictive control scarcely applies in many medium-sized and pint-sized eonllol system Because the predictive algorithm needs much more skilled engineers than that of PID controllers ,moreover, predictive algorithm needs more calculations So aiming at the characters of the process control system,the paper researched and finished the low-cost and real-time predictive control software for simulations and real time controls The software has been successful applied in laboratories and industrial control system.The main work is summarized as follows:
1. The paper researches and analyzes multiple variable dynamic matrix control (DMC) algorithms and finds the deficiencies of the basic DMC algorithm At the same time, the paper also improves the algorithm aiming at characters of process control system. After analyzing the difficulties the basic DMC algorithm encountering in control system with integral process,the paper finds the new DMC algorithm form fitting for the control system with integrals,and successfully applies it into industrial system.
2. Programming with VC++ language.A test edition of Predictive Control Software based on PC platform have been developed successfully for simulation and real-time control,including Parameters input module,Data collection module,System identification module,System response module , calculate control parameters movie,DMC online-control module,disturbs processing module,constraints processing module and Result output module. Various systems 'properties can be simulated using this package.
Keywords: predictive DMC ,simulation,real-time predictive control ,multiple input multiple output