Mesh Refinement Strategy for Optimal Control Problems

• Type: Article in International Conference Proceedings Book
• Date: 2013

Authors

L.T. Paiva (Author) FEUP; F.A.C.C. Fontes (Author) FEUP

Conference proceedings International

Title: AIP Conference Proceedings

Pages: 590-593

11th International Conference of Numerical Analysis and Applied Mathematics (ICNAAM)

GREECE, SEP 21-27, 2013

Indexing

ISI Web of Knowledge - 2 Citations

Scopus - 3 Citations

Scientific classification

FOS: Engineering and technology > Electrical engineering, Electronic engineering, Information engineering

Other information

Authenticus ID: P-008-GQV

DOI: 10.1063/1.4825560

Abstract (EN): Direct methods are becoming the most used technique to solve nonlinear optimal control problems. Regular time meshes having equidistant spacing are frequently used. However, in some cases these meshes cannot cope accurately with nonlinear behavior. One way to improve the solution is to select a new mesh with a greater number of nodes. Another way, involves adaptive mesh refinement. In this case, the mesh nodes have non equidistant spacing which allow a non uniform nodes collocation. In the method presented in this paper, a time mesh refinement strategy based on the local error is developed. After computing a solution in a coarse mesh, the local error is evaluated, which gives information about the subintervals of time domain where refinement is needed. This procedure is repeated until the local error reaches a user-specified threshold. The technique is applied to solve the car-like vehicle problem aiming minimum consumption. The approach developed in this paper leads to results with greater accuracy and yet with lower overall computational time as compared to using a time meshes having equidistant spacing.

Language: English

Type (Professor's evaluation): Scientific

No. of pages: 4