Optimal control problems with stopping constraints

We consider a novel optimal control problem in which the terminal time is governed by a stopping constraint. This stopping constraint is a nonlinear equality constraint depending on the state variables, and the terminal time is defined as the first time at which this constraint is satisfied. Since t...

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Main Authors: Lin, Qun, Loxton, R., Teo, Kok Lay, Wu, Yong Hong
Format: Journal Article
Published: Kluwer Academic Publishers 2015
Online Access:http://hdl.handle.net/20.500.11937/32754
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author Lin, Qun
Loxton, R.
Teo, Kok Lay
Wu, Yong Hong
author_facet Lin, Qun
Loxton, R.
Teo, Kok Lay
Wu, Yong Hong
author_sort Lin, Qun
building Curtin Institutional Repository
collection Online Access
description We consider a novel optimal control problem in which the terminal time is governed by a stopping constraint. This stopping constraint is a nonlinear equality constraint depending on the state variables, and the terminal time is defined as the first time at which this constraint is satisfied. Since the stopping constraint causes the terminal time to be an implicit function of the control, the optimal control problem we consider cannot be solved using conventional techniques. We propose a new computational approach that involves approximating the original problem by a standard optimal control problem with fixed terminal time. Our main result shows that this approximation, which depends on two adjustable parameters, can be made to arbitrarily high accuracy. On this basis, the original optimal control problem with stopping constraints can be transformed into a sequence of approximate problems, each of which can be solved readily using conventional optimal control techniques. We conclude the paper by demonstrating this approach with numerical simulations in three application areas: range maximization of a hang glider, range maximization of a hypersonic re-entry vehicle, and time-optimal control of a nuclear reactor.
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institution Curtin University Malaysia
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publishDate 2015
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spelling curtin-20.500.11937-327542019-02-19T05:35:39Z Optimal control problems with stopping constraints Lin, Qun Loxton, R. Teo, Kok Lay Wu, Yong Hong We consider a novel optimal control problem in which the terminal time is governed by a stopping constraint. This stopping constraint is a nonlinear equality constraint depending on the state variables, and the terminal time is defined as the first time at which this constraint is satisfied. Since the stopping constraint causes the terminal time to be an implicit function of the control, the optimal control problem we consider cannot be solved using conventional techniques. We propose a new computational approach that involves approximating the original problem by a standard optimal control problem with fixed terminal time. Our main result shows that this approximation, which depends on two adjustable parameters, can be made to arbitrarily high accuracy. On this basis, the original optimal control problem with stopping constraints can be transformed into a sequence of approximate problems, each of which can be solved readily using conventional optimal control techniques. We conclude the paper by demonstrating this approach with numerical simulations in three application areas: range maximization of a hang glider, range maximization of a hypersonic re-entry vehicle, and time-optimal control of a nuclear reactor. 2015 Journal Article http://hdl.handle.net/20.500.11937/32754 10.1007/s10898-015-0286-3 Kluwer Academic Publishers fulltext
spellingShingle Lin, Qun
Loxton, R.
Teo, Kok Lay
Wu, Yong Hong
Optimal control problems with stopping constraints
title Optimal control problems with stopping constraints
title_full Optimal control problems with stopping constraints
title_fullStr Optimal control problems with stopping constraints
title_full_unstemmed Optimal control problems with stopping constraints
title_short Optimal control problems with stopping constraints
title_sort optimal control problems with stopping constraints
url http://hdl.handle.net/20.500.11937/32754