Publication:
A simple approach for predicting time-optimal slew capability

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Authors
King, Jeffery T.
Karpenko, Mark
Subjects
Reaction wheels
Time-optimal attitude maneuvers
Agile spacecraft
Eigenaxis slews
Agility envelope
Advisors
Date of Issue
2016
Date
2016
Publisher
ElsevierLtd.
Language
Abstract
The productivity of space-based imaging satellite sensors to collect images is directly related to the agility of the spacecraft. Increasing the satellite agility, without changing the attitude control hardware, can be accomplished by using optimal control to design shortest-time maneuvers. The performance improvement that can be obtained using optimal control is tied to the specific configuration of the satellite, e.g. mass properties and reaction wheel array geometry. Therefore, it is generally difficult to predict performance without an extensive simulation study. This paper presents a simple idea for estimating the agility enhancement that can be obtained using optimal control without the need to solve any optimal control problems. The approach is based on the concept of the agility envelope, which expresses the capability of a spacecraft in terms of a three-dimensional agility volume. Validation of this new approach is conducted using both simulation and on-orbit data.
Type
Article
Description
The article of record as published may be found at http://dx.doi.org/10.1016/j.actaastro.2015.12.009
Series/Report No
Department
Mechanical and Aerospace Engineering (MAE)
Organization
Naval Postgraduate School (U.S.)
Identifiers
NPS Report Number
Sponsors
Funder
Format
12 p.
Citation
Acta Astronautica 120 (2016) 159–170
Distribution Statement
Rights
This publication is a work of the U.S. Government as defined in Title 17, United States Code, Section 101. Copyright protection is not available for this work in the United States.
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