Control and Pointing of Very Flexible Large Space Structures

Award Information
Agency: Department of Defense
Branch: Air Force
Contract: F29601-02-C-0114
Agency Tracking Number: 011NM-0620
Amount: $732,048.00
Phase: Phase II
Program: SBIR
Awards Year: 2002
Solicitation Year: N/A
Solicitation Topic Code: N/A
Solicitation Number: N/A
Small Business Information
12030 Sunrise Valley Drive, Suite 400, Reston, VA, 20191
DUNS: 072651391
HUBZone Owned: N
Woman Owned: N
Socially and Economically Disadvantaged: N
Principal Investigator
 Lawrence Davis
 Controls Group Manager
 (321) 768-6500
Business Contact
 James Hanby
Title: Assistant Vice President
Phone: (228) 863-0007
Research Institution
The extreme flexibility of proposed ultra-lightweight spacecraft, such as the Air Force's PowerSail, will require a new generation of attitude control systems (ACS) that can accommodate low-frequency flexible dynamics within the pointing control bandwidth.In addition, as spacecraft designs continue to reduce mass density, it will become increasingly difficult to construct and validate dynamic models on the ground that are of sufficient fidelity to use for traditional fixed-gain control design. To meetthese challenges, we will show the feasibility of (Phase I) and demonstrate (Phase II) an adaptive attitude control design approach that works during flight to autonomously identify the system dynamics affecting the control bandwidth, then design feedbackcontrol laws to achieve predefined performance and stability criteria. Our technical approach is based on our Frequency Domain Expert (FDE) control algorithm, which has been demonstrated on the Space Station Freedom as part of the Middeck Active ControlExperiment (MACE-II).

* Information listed above is at the time of submission. *

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