Moving Roman: Reaction Wheels
Ғылым және технология
Reaction wheels are an essential part of pointing most space telescopes. They are basically flywheels driven by electric motors, which makes them more precise than thrusters and capable of running indefinitely on solar power. They spin to store angular momentum. By slowing or speeding the rotation of a given wheel, changing the amount of momentum, a computer can precisely adjust how the spacecraft points around its center of mass in one plane. With three wheels set at specific angles, a satellite can control its pitch, roll and yaw to point in any direction and then hold that position without any change.
NASA’s Nancy Grace Roman Space Telescope has added its set of reaction wheels to the main spacecraft body, or bus. Roman has six reaction wheels, rather than the necessary three, to give it more angular momentum for faster pointing, as well as complete redundancy should any one wheel fail.
Each of Roman’s wheels is 18 inches across, weighs roughly 45 pounds, and spins up to 4,000 rpm.
Music credit: "Breaking the Code" from Universal Production Music
Credit: NASA’s Goddard Space Flight Center
Producer: Scott Wiessinger (KBR Wyle Services, LLC)
Animator:Jonathan North (KBR Wyle Services, LLC)
Animator: Krystofer Kim (KBR Wyle Services, LLC)
Videographer: Sophia Roberts (Advocates in Manpower Management, Inc.)
Narrator: Scott Wiessinger (KBR Wyle Services, LLC)
This video can be freely shared and downloaded at svs.gsfc.nasa.gov/14525. While the video in its entirety can be shared without permission, the music and some individual imagery may have been obtained through permission and may not be excised or remixed in other products. Specific details on such imagery may be found here: svs.gsfc.nasa.gov/14525. For more information on NASA’s media guidelines, visit nasa.gov/multimedia/guidelines.
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Пікірлер: 52
Flywheels and gyros are fascinating!
Nicely explained and thanks for including metric measurements too.
@LindaJuffermans
27 күн бұрын
Scientists usually do :)
Well explained. Thank you.
Most fascinating and educational NASA Goddard video in a long time. Loved it!
I was today years old when I learned about reaction wheels. That's an amazing technology.
@alphagt62
12 күн бұрын
I knew they used gyros to control movement, but I didn’t know exactly how, until now
@Vtarngpb
11 күн бұрын
You should play Kerbal Space Program 😉
@ClosestNearUtopia
11 күн бұрын
This guy never holded a grinder, or drill apparently his whole live😂
Science is amazing. People did that.
that's f-ing BRILLIANT! nasa never ceases to amaze...
Brilliant!
OMG, awesome! Never knew this and love it!
I see a line of interactive toys to be used in zero gravity using reaction wheel tech and small ducted fans for thrusters.
This was neat! Thank you!
Thank you. Looking forward to its launch!!
I bet you were hoping to get a reacion out of me. It WORKED!
@Knowyourbody
12 күн бұрын
Four wheel?
Very good and concise explanation.
Very well explained!
Sick vid Goddard
Thank You 💞💞
Awsome for sharing that interesting, technological info!.
Well, that's new to me. Thanks!
Thank You 🙏✌
Very informative :)
So cool.
Cool video
Hi! Thanks. Great. ❤
excelent
Every technology has some room to evolve and mature...
Nothing can stop human progress
@guimarotta
29 күн бұрын
Except greed...
@siedliko
29 күн бұрын
ISLAM
@DSAK55
29 күн бұрын
have you seen trump supporters
Thrusters are still needed to reset reaction wheels due to losses.
We're voyagers using thrusters in or reaction wheels?
What kind of bearings are used to keep these wheels turning for decades without maintenance?
Why can't counter rotating flywheels spin themselves down?
neat.
Fancy
At 2:00, what exactly does it mean?
Thrusters Mr. Sulu
Me knowing about this since playing Kerbal Space Program 💀
Haven't heard of this Telescope, what is its primary function? Optical or infrared?
uah! 💥💥💥🐻👍👍👍
i like roman
My main takeaway is that each wheel is size of a large pizza.
how bout them microwave rockets, go all electric.
Cool stuff!
.