화학공학소재연구정보센터
Computers & Chemical Engineering, Vol.19, No.4, 375-381, 1995
A Comparison of Collocation Methods for Solving Dynamic Optimization Problems
This paper describes and compares a global end-point collocation method with the SOCOLL method. The effects of the number of interior collocation points (N) and the collocation methods themselves are investigated using an example. A second example shows the effectiveness of the endpoint collocation method with a state constrained problem. For the first example, the overall deviation between the approximate state profile [generated via the nonlinear program (NLP)] and the true state profile (generated via simulating the original model with the optimal control policy) was smaller for the end-point collocation method. The results also showed a nonuniform improvement with respect to increasing N. For the second example, the end-point collocation method (N = 5) gave better results than those found in the literature.