Offline and Online Computation of Optimal Trajectories in the Aerospace Field View Full Text


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Chapter Info

DATE

1994

AUTHORS

H. J. Pesch

ABSTRACT

The present paper is an introductory and survey paper of the treatment of realistically modeled optimal control problems for applications in the aerospace field. Especially those problems are considered which include different types of constraints. In the tutorial part of the paper, recipes are given for the treatment of optimal control problems for which, among other constraints, control and/or state variable inequality constraints are to be taken into account. Optimal control problems having singular subarcs and/or discontinuities are also investigated. The discussion of the necessary conditions aims at the subsequent application of the multiple shooting method, which is known to be a very precise and efficient method for the solution of those multipoint boundary-value problems that arise from these necessary conditions. Homotopy techniques as well as the fusion of direct collocation and multiple shooting techniques are described. Both approaches facilitate the construction of an appropriate initial trajectory to start the multiple shooting iteration. In the survey part of the paper, some recently published new guidance methods are described. These methods are based, on the one hand, on the theory of neighboring extremals and, on the other hand, on the multiple shooting method. They are designed for the real-time computation of optimal trajectories in aerospace applications. Five challenging optimal control problems from the field of aerospace engineering run throughout the whole paper and illustrate the use of the recipes, i.e., the necessary conditions that must be satisfied by an optimal solution. Numerical results are given for these problems to demonstrate the performance of the multiple shooting method for the offline computation of optimal trajectories as well as the performance of the guidance schemes for the online computation of optimal trajectories. More... »

PAGES

165-220

Book

TITLE

Applied Mathematics in Aerospace Science and Engineering

ISBN

978-1-4757-9261-4
978-1-4757-9259-1

Identifiers

URI

http://scigraph.springernature.com/pub.10.1007/978-1-4757-9259-1_9

DOI

http://dx.doi.org/10.1007/978-1-4757-9259-1_9

DIMENSIONS

https://app.dimensions.ai/details/publication/pub.1025170414


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