摘要
研究复杂反应体系动力学参数估计方法 ,提出Marquardt法的两种改进算法。一是引入步长因子λ ,并随着目标函数的变化调节其大小 ,控制计算过程快速进入收敛区间。二是当待估参数值进入收敛区间后 ,通过调节阻尼因子d的大小 ,加速收敛。该方法用于馏分油五集总催化裂化反应动力学模型的动力学参数估计 ,既降低了算法对初值的要求 ,保证收敛稳定性 ,又加快了迭代收敛速度。
Two modified calculation methods of Marquardt for predicting parameters of a complex reaction system were put forward.(1)Introducing the factor of step length and adjusting it according to variations of the target function to quickly control the calculating process into the convergence range.(2)When parameters to be predicted enter the convergence intervals,modifying the damping factor to accelerate the convergence rate.Using this method to predict the parameters of FCC 5 lumping dynamic model of distilltes,not only the requirements to initial values can be reduced,the convergence stability guaranteed,but the iterative convergence rate accelerated as well.
出处
《炼油设计》
北大核心
2001年第4期52-55,共4页
Petroleum Refinery Engineering
