Variable Speed Control Moment Gyroscope Workbench: a new simulation tool for tomorrow's spacecraft

Richie, D.; Tsiotras, Panagiotis; Fausz, Jerry L.

doi:10.1109/dasc.2001.964219

Cited by 3 publications

(7 citation statements)

References 10 publications

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“…"simultaneous" in that the operations of combining attitude control actuation while storing energy are not decoupled, but instead "degrees of control freedom" are exploited to track instantaneous peak power demand requirements while simultaneously controlling attiude) [58][59][60][61]. This revolutionary work is the basis for the au- [12,107,108]. This work is one of two cornerstone efforts for the present investigation.…”

Section: Vscmgs For Energy Storagementioning

confidence: 99%

“…The first of these is the Lyapunov controller presented in [12,107,108] which involves driving the inertial angular position and angular velocity errors to zero based on desired performance gains. The second controller is the variable-limiter proportional-plus-integral-plus-derivative (VLPID) controller presented by Wie et.…”

Section: Vehicle Controllersmentioning

confidence: 99%

“…This consideration in that chapter allows the results to be compared to existing literature (using that literature as benchmark data), for example the results of Yoon in [109,110], Shen in [59,60], and Richie in [12,107,108].…”

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confidence: 99%

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Combines Attitude Control and Energy Storage for Small Satellites using Variable Speed Control Moment Gyroscopes

Lappas¹

2008

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Public reporting burden for this collection of information is estimated to average 1 hour per response, including the time for reviewing instructions, searching existing data sources, gathering and maintaining the data needed, and completing and reviewing the collection of information. Send comments regarding this burden estimate or any other aspect of this collection of information, including suggestions for reducing the burden, to Department of Defense, Washington Headquarters Services, Directorate for Information SPONSOR/MONITOR'S ACRONYM(S) 9. SPONSORING/MONITORING AGENCY NAME(S) AND ADDRESS(ES)EOARD Unit 4515 BOX 14 APO AE 09421 SPONSOR/MONITOR'S REPORT NUMBER(S)Grant 05-3037 DISTRIBUTION/AVAILABILITY STATEMENTApproved for public release; distribution is unlimited. SUPPLEMENTARY NOTES ABSTRACTThis report results from a contract tasking University of Surrey as follows: The Grantee will investigate three areas concerning energy storage and attitude control systems (ESACS) for small satellites: a.) Use of small satellite reference models to determine the relative scales for a combined variable speed control moment gyroscope (VSCMG) energy storage (ES) system. b.) Explore potential imbalances, derive mathematical descriptions of ESACS-imbalance systems and model the ESACS system in MATLAB/Simulink.. c.) Construct experimental hardware for power conversion demonstration: An experimental VSCMG system will be used to demonstrate combined attitude control and energy storage. The imbalances modeled in (b.) will be replicated in the experimental hardware. Derived control solutions to the imbalance problem will be implemented and validated in the experimental hardware. SUBJECT TERMS Government DisclaimerThe views expressed in this article are those of the authors and do not reflect the official policy or position of the United States Air Force, Department of Defense, or the U.S. Government. AcknowledgementsThe ii Summary This work presents the first known energy storage and attitude control subsystem (ESACS) for small satellites, proving this technology to be viable, applicable to more complex, demanding space missions, and laden with substantial benefits, such as agile slewing, robust singularity avoidance, increased lifetime, mass savings, and favourable peak power density. In capturing the key features of this novel system, it investigates the design sizing, feasibility, mission utility, experimentation, and performance benefits for using variable-speed control moment gyroscopes (VSCMGs) to store and drain energy while controlling satellite orientation.First, a novel optimal ESACS sizing algorithm is developed for a practical, miniature spotlight synthetic aperture RADAR (SAR) space mission. When given a set of small satellite agility and energy storage requirements, the design is cast as a constrained nonlinear programming problem using a performance index constructed from subsystem design margins including the attitude torque, peak power, energy capacity, and subsystem mass margins and solved using a reduced-o...

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Section: Vscmgs For Energy Storagementioning

confidence: 99%

Section: Vehicle Controllersmentioning

confidence: 99%

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Combines Attitude Control and Energy Storage for Small Satellites using Variable Speed Control Moment Gyroscopes

Lappas¹

2008

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“…Alternatively, coordinated action between the thrusters and the wheels can be used to damp the excess momentum of the wheels if needed [16]. A SIMULINK-based software tool (the "The VSCMG Workbench"), has been developed in [7] for simple and quick implementation of VSCMG cluster geometry and IPACS control laws. The program uses a modularized structure that permits flexibility in implementation.…”

Section: Adaptive Attitude Control and Power Tracking Using Vscmg'smentioning

confidence: 99%

“…In [1,6,7,9,12] we developed control laws for coordinated attitude control with power storage and distribution on-board a spacecraft using variable-speed control moment gyros (VSCMGs). VSCMGs seem to be particularly appealing as IPACS actuators since they can use the gimbal and spin axis degrees of freedom to effectively decouple the tasks of attitude control and of energy storage.…”

Section: Adaptive Attitude Control and Power Tracking Using Vscmg'smentioning

confidence: 99%

Nonlinear Spacecraft Control with Applications to Combined Attitude and Energy Storage

Tsiotras¹

2004

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The public reporting burden for this collection of information is estimated to average 1 hour per response, inck gathering and maintaining the data needed, and completing and reviewing the collection of information. Send comr information, including suggestions for reducing the burden, PERFORMING ORGANIZATION NAME(S) AND ADDRESS(ES)The Georgia Institute of Technology Atlanta, GA 30332-0150 SPONSORING/MONITORING AGENCY NAME(S) AND ADDRESS(ES)Air The main objective of this research was to support the Air Force efforts in the development of an Integrated Power and Attitude Controls System (IP ACS) for spacecraft applications. An IP ACS will combine the attitude control and power distribution subsystems onboard a spacecraft reducing the bus mass, and thus leading to increased payload. Several options for IP ACS have been investigated in this work including clusters of momentum wheels and variable-speed control moment gyros. The latter seem to be ideally suited for IP ACS applications since they naturally decompose the power storage/release function using the wheel acceleration, and the attitude control function using the gimbal acceleration. Consequently, the focus of this research has thus been confined to the use of VSCMG5. Several practical and theoretical issues were encountered and were successfully addressed. Executive SummaryTherein we summarize the research results developed under AFOSR Grant number F49620-00-1-0374. The period of performance for this research awaxd was from August 2000 to January 2004. The main objective of this research was to support the Air Force efforts in the development of an Integrated Power and Attitude Controls System (IPACS) for spacecraft applications. An IPACS will combine the attitude control and power distribution subsystems onboard a spacecraft, reducing the bus mass, and thus leading to increased payload. Several options for IPACS have been investigated in this work including clusters of momentum wheels and variable-speed control moment gyros. The latter seem to be ideally suited for IPACS applications since they naturally decompose the power storage/release function using the wheel acceleration, and the attitude control function using the gimbal acceleration. Consequently, the focus of this research has thus been confined to the use of VSCMGs. Several practical and theoretical issues were encountered and were successfully addressed. The problem of singular configurations during the operation of a VSCMG cluster has been completely analyzed. A simple design criterion has been proposed to size the flywheels so no inescapable singularities occur. For escapable singularities appropriate control laws have been designed. Experimental results have been obtained via a high-fidelity spacecraft simulator facility that was designed and developed with the help of an accompanying DURIP/AFOSR award. Flywheels used in an IPACS typically need to spin at very high speeds (more than 60,000 rpm) in order to be competitive with chemical batteries. At such high speeds the shaft/flywheel flexibi...

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Closed-Loop Power Tracking for an Integrated Power and Attitude Control System Using Variable-Speed Control Moment Gyroscopes

DeVon

Fuentes

Fausz

2004

AIAA Guidance, Navigation, and Control Conference and Exhibit

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Variable Speed Control Moment Gyroscope Workbench: a new simulation tool for tomorrow's spacecraft

Cited by 3 publications

References 10 publications

Combines Attitude Control and Energy Storage for Small Satellites using Variable Speed Control Moment Gyroscopes

Combines Attitude Control and Energy Storage for Small Satellites using Variable Speed Control Moment Gyroscopes

Nonlinear Spacecraft Control with Applications to Combined Attitude and Energy Storage

Closed-Loop Power Tracking for an Integrated Power and Attitude Control System Using Variable-Speed Control Moment Gyroscopes

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