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Co-Design of Strain-Actuated Solar Arrays for Precision Pointing and Jitter Reduction

Chilan, Christian M. and Herber, Daniel R. and Nakka, Yashwanth K. and Chung, Soon-Jo and Allison, James T. and Aldrich, Jack B. and Alvarez-Salazar, Oscar S. (2016) Co-Design of Strain-Actuated Solar Arrays for Precision Pointing and Jitter Reduction. In: Structures, Structural Dynamics, and Materials Conference 57th AIAA/ASCE/AHS/ASC. American Institute of Aeronautics and Astronautics (AIAA) , Reston, VA, Art. No.-2016. ISBN 978-1-62410-392-6.

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Many important spacecraft operations require precision pointing such as space astronomy and high-rate communications. Traditionally, reaction wheels have been used for this purpose but they have been considered unreliable for many missions. This work presents the use strain-actuated solar arrays (SASA) for precision pointing and jitter reduction. Piezoelectric actuators can achieve higher precision and bandwidth than reaction wheels, and they can also provide quiet operation for sensitive instruments. The representation of the array dynamics in the studies presented here is based on Euler-Bernoulli beam theory for high-fidelity simulations. This work also presents a methodology for the combined design of distributed structural geometry for the arrays and distributed control system design. The array geometry design allows for a distributed thickness profile, and the control design determines the distributed moment on the array. Fundamental limits on slew magnitude are found using pseudo-rigid body dynamic model (PRBDM) theory. A parametric study based on a representative spacecraft model demonstrates the validity of the proposed approach and illustrates optimal design trends.

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CaltechAUTHORS:20170523-113653804Related ItemJournal Article
Nakka, Yashwanth K.0000-0001-7897-3644
Chung, Soon-Jo0000-0002-6657-3907
Additional Information:© 2016 American Institute of Aeronautics and Astronautics. Government sponsorship is acknowledged. The research was in part carried out at the Jet Propulsion Laboratory, California Institute of Technology under a contract with the National Aeronautics and Space Administration. The authors acknowledge help from Giri Subramanian and Kevin Lohan during the initial phases of the project.
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AIAA Paper2016-0162
Record Number:CaltechAUTHORS:20161220-115042791
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Official Citation:Christian M. Chilan, Daniel R. Herber, Yashwanth K. Nakka, Soon-Jo Chung, James T. Allison, Jack B. Aldrich, and Oscar S. Alvarez-Salazar. "Co-Design of Strain-Actuated Solar Arrays for Precision Pointing and Jitter Reduction", 57th AIAA/ASCE/AHS/ASC Structures, Structural Dynamics, and Materials Conference, AIAA SciTech Forum, (AIAA 2016-0162)
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:72982
Deposited By: Ruth Sustaita
Deposited On:20 Dec 2016 23:35
Last Modified:11 Nov 2021 05:09

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