Abstract: The method of modelling and control based on characteristic variables chosen according to system output distributions is presented. Simulation results are satisfactory. Experiments are carried out in a pilot binary distillation column (15 trays with feed of alcohol and water mixture) controlled by a microcomputer system. It is shown that the simlified model can approximate the complete model of distillation column very well and the control strategy has significant advantage compared with a conventional control strategy. This method can also be applied to a kind of high order, nonlinear, distributed parameter systems, which is difficult to deal with.

摘要： 提出了依据系统输出分布的特征变量选取方法,并提出了依据该项信息的建模和控制方法.仿真结果令人满意.在一个实验性二元精馏塔上用IBM-PC机进行试验亦获成功.简化模型能较好地近似精馏塔的逐板模型,控制策略优于常规PI控制策略.