TY - JOUR
T1 - Impact of strain-actuated attitude control systems for variant mission classes
AU - Vedant,
AU - Ghosh, Alexander
AU - Alvarez-Salazar, Oscar
AU - Allison, James T.
N1 - Funding Information:
This material is based upon work partially supported by the National Science Foundation under Grant No. CMMI-1653118, and partially through the NASA SBIR effort with NASA Ames, in collaboration with CUA Contract No. NNX17CA25P. The work has also been partially supported by funding from NASA JPL.
Publisher Copyright:
Copyright © 2019 by the International Astronautical Federation (IAF). All rights reserved.
PY - 2019
Y1 - 2019
N2 - The University of Illinois, in collaboration with NASA Jet Propulsion Laboratory (JPL) and NASA Ames Research Center, has developed a novel Attitude Control System (ACS) called the Strain Actuated Solar Arrays (SASA), with sub-milli-arcsecond pointing capability. SASA uses strain-producing actuators to deform flexible deployable structures, and the resulting reaction forces rotate the satellite. This momentum transfer strategy is used for jitter reduction and small-angle slew maneuvers. The system is currently at a Technology Readiness Level of 4-5 and has an upcoming demonstration flight on the CAPSat CubeSat mission. An extension to the SASA concept, known as Multifunctional Structures for Attitude Control (MSAC), enables arbitrarily large-angle slew maneuvers in addition to jitter cancellation. MSAC can potentially replace reaction wheels and control moment gyroscopes for attitude control systems, thereby eliminating a key source of jitter noise. Both SASA and MSAC are more reliable because of fewer failure modes and lower failure rates as compared to conventional ACS, while having an overall smaller mass, volume, and power budget. The paper discusses the advantages of using SASA and MSAC for a wide range of spacecraft and variant mission classes.
AB - The University of Illinois, in collaboration with NASA Jet Propulsion Laboratory (JPL) and NASA Ames Research Center, has developed a novel Attitude Control System (ACS) called the Strain Actuated Solar Arrays (SASA), with sub-milli-arcsecond pointing capability. SASA uses strain-producing actuators to deform flexible deployable structures, and the resulting reaction forces rotate the satellite. This momentum transfer strategy is used for jitter reduction and small-angle slew maneuvers. The system is currently at a Technology Readiness Level of 4-5 and has an upcoming demonstration flight on the CAPSat CubeSat mission. An extension to the SASA concept, known as Multifunctional Structures for Attitude Control (MSAC), enables arbitrarily large-angle slew maneuvers in addition to jitter cancellation. MSAC can potentially replace reaction wheels and control moment gyroscopes for attitude control systems, thereby eliminating a key source of jitter noise. Both SASA and MSAC are more reliable because of fewer failure modes and lower failure rates as compared to conventional ACS, while having an overall smaller mass, volume, and power budget. The paper discusses the advantages of using SASA and MSAC for a wide range of spacecraft and variant mission classes.
KW - Attitude control system
KW - Fine position control
KW - Jitter rejection
KW - Pointing stability
KW - Sub-milli-arcsecond pointing
KW - Vibration dampening
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M3 - Conference article
AN - SCOPUS:85079162422
VL - 2019-October
JO - Proceedings of the International Astronautical Congress, IAC
JF - Proceedings of the International Astronautical Congress, IAC
SN - 0074-1795
M1 - IAC-19_C1_5_2_x50070
T2 - 70th International Astronautical Congress, IAC 2019
Y2 - 21 October 2019 through 25 October 2019
ER -