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Optimization of motion control laws for tether crawler or elevator systemsBased on the proposal of a motion control law by Lorenzini (1987), a method is developed for optimizing motion control laws for tether crawler or elevator systems in terms of the performance measures of travel time, the smoothness of acceleration and deceleration, and the maximum values of velocity and acceleration. The Lorenzini motion control law, based on powers of the hyperbolic tangent function, is modified by the addition of a constant-velocity section, and this modified function is then optimized by parameter selections to minimize the peak acceleration value for a selected travel time or to minimize travel time for the selected peak values of velocity and acceleration. It is shown that the addition of a constant-velocity segment permits further optimization of the motion control law performance.
Document ID
19890056027
Document Type
Conference Paper
Authors
Swenson, Frank R. (Tri-State University Angola, IN, United States)
Von Tiesenhausen, Georg (NASA Marshall Space Flight Center Huntsville, AL, United States)
Date Acquired
August 14, 2013
Publication Date
January 1, 1988
Subject Category
SPACECRAFT DESIGN, TESTING AND PERFORMANCE
Meeting Information
Intl. Conference on Space Tethers for Science in the Space Station Era(Venice)
Funding Number(s)
CONTRACT_GRANT: NGT-01-002-099
Distribution Limits
Public
Copyright
Other