CAJ | 학술논문

在对工业过程进行建模时,模型规模庞大,现场运行工况点较多.构造全联立参数估计模型,模型规模随着工况数的增加成倍扩大,在初值较差的情况下,求解收敛性差.针对此问题,本文提出1种目标序贯式参数估计方法,按照特定规则分批调整目标,逐步添加约束,使得目标分批逼近设定值,最后在新的初值基础上求解联立参数估计优化命题.本文以PTA氧化反应工段模型为例,对其反应动力学常数进行参数估计,结果表明,目标序贯式参数估计收敛性强.
재대공업과정진행건모시,모형규모방대,현장운행공황점교다.구조전련립삼수고계모형,모형규모수착공황수적증가성배확대,재초치교차적정황하,구해수렴성차.침대차문제,본문제출1충목표서관식삼수고계방법,안조특정규칙분비조정목표,축보첨가약속,사득목표분비핍근설정치,최후재신적초치기출상구해련립삼수고계우화명제.본문이PTA양화반응공단모형위례,대기반응동역학상수진행삼수고계,결과표명,목표서관식삼수고계수렴성강.
The modeling of a large-scale industrial process with multiple operating points is a complicate task,in which the parameter estimation plays an important role in determining a proper model.For a simultaneous mode parameter estimation,the model size increases with the number of operating points.In the case of a poor initial value,convergence of the large scale parameter estimation could be very poor.In this paper,a target-sequential parameter estimation method is proposed.It sequentially adjusts the target and adds the constraints to ensure the good convergence performance.Finally,the method is successfully applied to the PTA oxidation model.