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Variational Trajectory Optimization Tool Set: Technical description and user's manualThe algorithms that comprise the Variational Trajectory Optimization Tool Set (VTOTS) package are briefly described. The VTOTS is a software package for solving nonlinear constrained optimal control problems from a wide range of engineering and scientific disciplines. The VTOTS package was specifically designed to minimize the amount of user programming; in fact, for problems that may be expressed in terms of analytical functions, the user needs only to define the problem in terms of symbolic variables. This version of the VTOTS does not support tabular data; thus, problems must be expressed in terms of analytical functions. The VTOTS package consists of two methods for solving nonlinear optimal control problems: a time-domain finite-element algorithm and a multiple shooting algorithm. These two algorithms, under the VTOTS package, may be run independently or jointly. The finite-element algorithm generates approximate solutions, whereas the shooting algorithm provides a more accurate solution to the optimization problem. A user's manual, some examples with results, and a brief description of the individual subroutines are included.
Document ID
19930023192
Acquisition Source
Legacy CDMS
Document Type
Technical Memorandum (TM)
Authors
Bless, Robert R.
(Lockheed Engineering and Sciences Co. Hampton, VA., United States)
Queen, Eric M.
(NASA Langley Research Center Hampton, VA, United States)
Cavanaugh, Michael D.
(George Washington Univ. Hampton, VA., United States)
Wetzel, Todd A.
(Iowa State Univ. of Science and Technology, Ames., United States)
Moerder, Daniel D.
(NASA Langley Research Center Hampton, VA, United States)
Date Acquired
September 6, 2013
Publication Date
July 1, 1993
Subject Category
Spacecraft Design, Testing And Performance
Report/Patent Number
L-17166
NAS 1.15:4442
NASA-TM-4442
Accession Number
93N32381
Funding Number(s)
PROJECT: RTOP 946-01-00-82
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.
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