Questions tagged [gyroscope]

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Inserting optical elements into a ring laser gyroscope to sense all three axes

Ring laser gyroscopes (RLGs) leverage the physics of ring laser interferometers and the Sagnac effect to sense rotation in a single plane. My understanding of RLGs is that they are independent systems ...
Jonathan L.'s user avatar
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How to calculate initial Rotation Matrix/ Euler Angles/ Quaternion for IMU data (gyroscope and accelerometer)?

I am trying to develop a code to track vehicle using GNSS/GPS data (NMEA) and IMU data (Gyroscope x,y,z; accelerometer x,y,z) i.e. dead reckoning using kalman filter. I know there's enough literature ...
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Which nD accelerometer symmetric configurations on a cubical LEO spacecraft can serve as a makeshift 3D gyro resolving tumbling from tidal forces?

As they often do @DavidHammen's comment has got me thinking about the following question, which is a mathematical exercise rather than a realistic scenario. On a hypothetical large cubical spacecraft ...
uhoh's user avatar
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What were the relative orientations of the Hubble Space Telescope's three star cameras, six rate gyros and four reaction wheels optimized for exactly?

Table 3. in paper Hubble Space Telescope Reduced-Gyro Control Law Design, Implementation and On-Orbit Performance; AAS 08-278 found in @OrganicMarble's answer seems to give the unit vectors where the ...
uhoh's user avatar
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What is the precision attitude estimation strategy for satellites, under impulsive thrust manoeuvres?

Satellites mostly rely on star trackers and gyros for precision attitude knowledge. Under impulsive thrust manoeuvres, I expect the star trackers to blur and provide no attitude knowledge. What is the ...
Watch This's user avatar
5 votes
1 answer
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What was back-up plan in case of Apollo CSM Primary Guidance System IMU went to gimbal lock?

In Apollo-11, during preparations for docking with Command and Service Module in lunar orbit, Armstrong and Aldrin managed to put Lunar Module Primary Guidance System Inertial Measurement Unit (IMU) ...
Sergiy Lenzion's user avatar
3 votes
1 answer
563 views

What are Starlink's available momentum unloading strategies?

Today's Teslarati article SpaceX wants to offer Starlink internet to consumers after just six launches talks about the new website https://www.starlink.com/ shows several images from it, and tries to ...
uhoh's user avatar
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Are new precision gyroscopes used in spaceflight pretty much all optical?

Gyroscopes are used in spaceflight as parts of inertial systems to monitor spacecraft attitude. They are not absolute, they will drift slowly over time and so need occasional calibration via other ...
uhoh's user avatar
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3 votes
1 answer
671 views

Hubble's one-gyro mode; how does it work for attitude control, stabilization, and slewing?

Space.com's Hubble Space Telescope Apparently in 'Safe Mode' After Gyroscope Failure says: "It’s true. Very stressful weekend. Right now HST is in safe mode while we figure out what to do. ...
uhoh's user avatar
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What is a gyrocompass and how might one be used by a planetary rover?

In comments and links therein below the question How does Curiosity know how to point and move it's high gain antenna in real time? there is mention of a gyrocompass. I am aware that gyros can be ...
uhoh's user avatar
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How do rate gyros measure yaw, roll and pitch rates?

I need some help in understanding how rate gyros are used for measuring rotation rates about the yaw, roll, and pitch directions. Suppose a gyro is used for measuring roll rate. How should the spin ...
Soumajit's user avatar
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4 votes
0 answers
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Do ring laser gyros age with laser and dithering disabled?

Laser fading seems to be a known issue with ring laser gyros. With their STEREO-B probe, NASA experienced a different, "unexpected" failure mode, giving false readings. The Honeywell MIMU's were well ...
Andreas's user avatar
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Can gyroscopic stabilization be done without any rotating parts?

In the video linked in this answer the spacecraft is said to be "gyroscopically balanced" (at about 00:20). I'm going to ask about the terminology associated with the phrase "gyroscopic ...
uhoh's user avatar
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