Advanced Control And Optimization Strategy In The Industrial Process

Model Predictive Control(MPC) technology has gained considerable attention for its good control performance since the generation of the MPC in the late 1970s. The great economic benefits by using the MPC packages make the people's focus attention upon them. In the published papers, only introduction of the functions and applications of the packages can be found, little technology is introduced in detail. In order to advance the technology of industrial control in our country, the only way is to develop our own commercial industrial control package.In this dissertation, A brief history of industrial MPC technology is presented first, followed by the distinguishing features of some famous MPC packages. Then, based on the Ninth Five-year's national key project "Research and development of the commercial industrial on-line control and optimization package", the construction of multivariable constrained control package MCC is presented, with an emphasis on the functions and technology of the MCPC controller. A number of examples are used to illustrate the capabilities of the MCPC controller. The final section presents the application of the on-line optimization technology in the membrane process of Alkali-Chlor cells, based on the Eighth Five-year's national key project.The major contributions of this dissertation are stated as follows: â‘  An abbreviated history of industrial MPC technology is presented and the distinguishing features of some famous MPC packages are introduced. â‘¡ Unlike traditional methods, MCCI permits several manipulated variables to change simultaneously during the test period. During plant testing, the process is not required to be at, or come to, a steady-state. Also, the plant operators can make adjustments to any manipulated variable to maintain product specifications. The only restriction is that compensating MV moves not be perfectly time-synchronized. MCCI is more efficient than ID2 used in...