Questions tagged [imu]

For questions regarding the use of or configuration of an Inertial Measurement Unit.

Filter by
Sorted by
Tagged with
2 votes
0 answers
95 views

How to calculate roll and pitch from an accelerometer in whatever orientation?

I’m trying to use a tri-axial accelerometer as an inclinometer, measuring the so called roll and pitch angles. The underlined principle is that in stationary conditions an accelerometer senses only ...
2 votes
0 answers
54 views

How to implement sensor fusion with IMU and GPS

I have a 9-axis IMU (MPU9250) and a GPS module and I'm considering using other sensors later,...
7 votes
1 answer
238 views

How are IMU used to detect orientation with respect to ground?

I have seen some interesting videos of quadcopters floating autonomously and recovering from free-fall flight using only IMU. Can someone tell me how gravitational acceleration is detected and ...
5 votes
1 answer
115 views

Betaflight attitude update rate only 100hz?

In the tasks.c file, this line in particular ...
2 votes
2 answers
172 views

Is roll rate, pitch rate and yaw rate same as gyro data along y-axis, x-axis and z-axis

As per the title, I want to understand if the roll rate/pitch rate/yaw rate are same as the data obtained from mpu9250 gyro sensor along y-axis, x-axis and z-axis? If not then how to calculate roll ...
  • 441
5 votes
1 answer
383 views

Eliminate effect of Vibrations on IMU

I am testing pitch orientation correction of Quadcopter and ended up in a issue. I have a test setup with one degree of freedom to test orientation correction. I have fixed the drone to the setup and ...
  • 441
6 votes
1 answer
225 views

Why is the noise in my accelerometer more pronounced than the noise in my gyro?

I have a small quadcopter equipped with the MPU6050, which has a built-in accelerometer and gyroscope. It is able to sample the acceleration at 1 kHz and the angular velocities at 8 kHz. However, I ...
3 votes
0 answers
39 views

What is the frame system defined for Orientations comptutation using Quaternions [Madgwick filter/ Mahony filter]?

I am working with MPU9250 and I have implemented attitude & heading reference system based on Madgwick/Mahony filter. I capture the raw data [accel, gyro, mag] and pass to the Madgwick filter in ...
  • 441
5 votes
1 answer
251 views

Finding the velocity and position for small distance from IMU sensors

I am working on finding Velocity and Displacement from an IMU sensor (MPU9250). I have a Navio2 RPi4 setup, which gives me raw data (acceleration, Gyro, Magnetic). As per my research this can be done ...
  • 441
8 votes
2 answers
417 views

What does the full scale range in a IMU MPU9250 datasheet signify?

I have MPU9250 IMU, which I am working on to get orientations from the sensor output data. While exploring the MPU9250 (also other sensor such as BNO055) datasheet I came across the full scale range ...
  • 441
10 votes
2 answers
2k views

Why is an MPU6000 more well suited for drones than an ICM IMU?

I have seen people say that the MPU6000 is the superior gyro chip, even though the ICM chip has a faster refresh rate and is technically superior in any other use. Why is it better to have a lower ...
7 votes
2 answers
426 views

Difference between a 3 and 6 axis gyro

When shopping for drones, I see a 3 and 6 axis gyro available, what is the difference between the two? Does one have a advantage when flying over another?
user avatar