# Questions tagged [imu]

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### Use local acceleration and angular velocity to calculate rotation matrix

Can I ask if there are any python packages that can fuse local acceleration and angular velocity and get rotation matrix? Thank you!
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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 ...
• 39
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### Do Curiosity and Perseverance have gyrocompasses? Has any rover had one? If so, what kind and how do they work?

There is discussion of a gyrocompass in comments on the page How does Curiosity know how to point and move it's high gain antenna in real time? but so far I don't think there is a hard "Yes&...
• 149k
168 views

### What causes a visual odometry failure?

Exploring the amazing Curiosity Analysts's notebook*, I came across the following in the "Sol 2931-2932 uplink report": However, the Sol 2929 drive was halted early (well short of location &...
• 2,239
1 vote
72 views

### What IMU did Beresheet fly?

Is there public information on the inertial measurement unit used by Beresheet during its landing attempt? More generally, is there information on the hardware flown on that vehicle?
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### Detailed description of space shuttle major and minor GNC loops

Warning: repetitive question ahead. Please skip if you're tired of splitting hairs on these things. Is there a detailed description of the major and minor GNC loops of the space shuttle? I've learned ...
1 vote
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### Noninertial effects a problem in strapdown IMUs?

Unlike stable-platform IMUs, which are fixed in space and therefore inertial, strapdown IMUs are fixed to the vehicle's body and therefore noninertial. Would noninertial effects distort the strapdown ...
348 views

### Falcon 9: Stable platform or strapdown IMU?

What type of IMU does the Falcon 9 use? Is it a stable platform aligned with a global frame by gimbals? Or is it a strapdown system fixed to the body of the rocket and therefore aligned not with a ...
183 views

### Was space shuttle position corrected for before orbital insertion?

The space shuttle derived its attitude and state vector primarily from its integrating accelerometers and rate gyros. Data from the accelerometers and rate gyros came in at a low rate (0.25-0.5 Hz, or ...