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The spacecraft was 3-axis stabilized with amomentumwheelthat was used to establish stability about the nominal rotation, or z-axis.
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This example is from Wikipedia and may be reused under a CC BY-SA license.Actuators were three momentum wheels, and hot gas (hydrazine mono-propellant) thrusters.
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This example is from Wikipedia and may be reused under a CC BY-SA license.This marks the technological improvement from spin-stabilisation, used in earlier cylindrical satellites, to three-axis stabilisation using momentum wheels and reaction wheels controlling the satellite gyroscopically.
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This example is from Wikipedia and may be reused under a CC BY-SA license.Momentum wheels are generally suspended on magnetic bearings to avoid bearing friction and breakdown problems.
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This example is from Wikipedia and may be reused under a CC BY-SA license.Most satellites have simple reliable chemical thrusters (often monopropellant rockets) or resistojet rockets for orbital station-keeping and some use momentum wheels for attitude control.
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This example is from Wikipedia and may be reused under a CC BY-SA license.Since momentum wheels make up a small fraction of the spacecraft's mass and are computer controlled, they give precise control.
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Wikipedia
This example is from Wikipedia and may be reused under a CC BY-SA license.Rockets rely on momentum, airfoils, auxiliary reaction engines, gimballed thrust, momentum wheels, deflection of the exhaust stream, propellant flow, spin, and/or gravity to help control flight.
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Wikipedia
This example is from Wikipedia and may be reused under a CC BY-SA license.These examples are from corpora and from sources on the web. Any opinions in the examples do not represent the opinion of the Cambridge Dictionary editors or of Cambridge University Press or its licensors.
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