Sizing/Optimization of a Small Satellite Energy Storage and Attitude Control System

Abstract

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

“…The first two approaches use the available capacity equation presented in [14] while the third approach applies the usable capacity concept defined here. The designs were determined in the following order: first, an optimization with fixed rotor length was done, then, an optimization was done by changing the available capacity equation to the method from [14], and finally, a separate optimization was done for the old design.…”

“…The first two approaches use the available capacity equation presented in [14] while the third approach applies the usable capacity concept defined here. The designs were determined in the following order: first, an optimization with fixed rotor length was done, then, an optimization was done by changing the available capacity equation to the method from [14], and finally, a separate optimization was done for the old design. This approach yielded three distinctly different point designs that are illustrated in Figure 5.15(f) and summarized in Table 5 The culmination of this effort yields the mass savings versus rotor length for different design alternatives as reflected in Figure 5.16.…”

“…Notice the agile slew maneuver parameters, θ f , t f , and t of f and high peak power demand, P r delivering mission payload power for 10% of the eclipse period. As in [14], the outer and inner rotor radii are fixed while the rotor length is permitted to vary.…”

“…We now size the small satellite ESACS for the spotlight Synthetic Aperture RADAR (SAR) example investigated in [14] as summarized by table 5.5. This type of mission requires agile slewing simultaneously with high instantaneous peak power demand.…”

“…• Sizing VSCMG components for a small satellite ESACS as published in the July/August 2007 edition of the American Institute of Aeronautics and Astronautics Journal of Spacecraft and Rockets [14]. The investigation of the current state of the art through the open literature reveals that this was not yet done prior to the current study.…”