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Questions tagged [imu]

Use the IMU tag for questions about writing software that interacts with Inertial Measurement Units.

An inertial measurement unit (IMU) is an electronic device that measures and reports a body's specific force, angular rate, and sometimes the magnetic field surrounding the body, using a combination of accelerometers and gyroscopes, sometimes also magnetometers.

IMU Wikipedia page: https://en.wikipedia.org/wiki/Inertial_measurement_unit

154 questions
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GPS + IMU Fusion filter

I have a question. I have a twin-engine boat and I want to implement an autopilot in it. Using GPS alone my boat goes to the destination like a sine wave, unfortunately for 300m. Just like the picture below. I Use RadioLink M8N GPS SE100…
PYJTER
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How to do transformation to get correct linear velocity from linear acceleration IMU data?

I have IMU sensor that gives me the raw data such as orientation, Angular and Linear acceleration. Im using ROS and doing some Gazebo UUV simulation. Furthermore, I want to get linear velocity from the raw IMU data. If I do integration over time…
Bob9710
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Ros package for sensor Fusion (IMU and Pressure) data?

Im looking for a ROS package (KF or UKF or EKF) that can fuse IMU and Pressure Sensors data. I would like to have 6x6 estimated Velocity matrices( linear and angular) from the IMU and Pressure sensor data. IMU is 9 DOF ( orientation,…
Bob9710
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IMU Client responce values are all zero when runing ROS services

I create ROS services that pass the IMU sensors values from the Server to Client. Im able to build the package but some how the Client values are all zeros. So I would like to create IMU ROS services. I have a Server(in my case is a microcontroller…
Bob9710
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ROS IMU services, client and server node templates

I would like to create IMU ROS services. I have a Server(in my case is a microcontroller ESC32) that can obtain IMU reading and should pass to the Client (in my case is Raspberry PI 4B) the IMU data when requested for further processing.So I just…
Bob9710
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mpu6050&dmp and stm32h7 usage

I trying to use mpu6050 with dmp but how I can do that? I didn't find any source, any register or something like that. I have a stm32h7 right now but there is no library related to this or I didn't find again. please someone help me
Tarık Uçar
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Storing many objects and their data within arrays from IMUs for further calculation

I currently have a robotics project which is using many (16) IMU's specifically the MPU9250 running under SPI. As a reduced example of six sensors using the Bolder flight library int cs[6] = {21, 25, 26, 27, 32, 14}; //chipselects MPU9250 IMU0(SPI,…
DrMrstheMonarch
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Impact of motors on IMU

Currently, we are using BNO055 in one of our projects. The IMU is placed next to the dc motor due to space constraints within the hardware setup. Due to motors vibrations, we are applying a low pass filter on quaternion values read from this…
Veeresh
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how to read data from the BNO085 sensor

How to read and write the data in the BNO085 sensor through I2C. I2C interface is available sensor but no register data are available in datasheet.
Arun
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Conversion Formula for Yaw-Pitch-Roll from Raw 9-D0F IMU Values (Gyroscope, Accelerometer, Magnetometer)

I am getting raw values from a 9 DoF IMU Sensor (MPU9250), the values contain Gyroscope(Gx,Gy,Gz), Accelerometer(Ax,Ay,Az), and Magnetometer(Mx,My,Mz). I wish to get Yaw, Pitch and Roll from these values on Python. Can someone kindly share a…
Osama_Robotics
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IMU Calibration with 16bit precision

I want to calibrate an IMU Sensor to a decimal precision. I'm programming in C. I've defined a structure called accelerations with their variables x, y and z in int16_t format. The raw values that I get (for the x, y and z Axis respectively) from…
Desperate Morty
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alignment of global quaternions

I'm working with imu sensor which output orientation quaterinons with reference to a global ENU coordinate system. I want to calculate joint angles between 3 sensors on the lower body (see picture) but I can't find a way to align the sensors to the…
Masilila
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How can i draw a path relative to the room with orientation and acceleration relative to Sensor reference system?

I have lead an experimente of human pedestrian dead-reckoning indoor . For this reaseon I chose to use a 6DOF IMU. the relative 3-axis acceleration respect to the sensor reference system and a 3-axis Angular-Velocity from gyroscope. Can you give me…
Andrea Gusmara
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Calculate the rotation between 2 Inertial Measurement Unit (IMU) for each Tait-Bryan angles

The first IMU (called S1) is placed on the shoulder and works as a reference; the other (S2) is placed on the arm. They provide the quaternion of their rotation relative to the absolute reference (magnetic north and gravity vector). The simple idea…
RSSR
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How to calculate speed by accelerometer in C?

I placed the sensor on the window, and moved the window to get the speed and distance of x-axis direction. But when I stop moving, the speed reading is not zero, this causes error in distance measurement. How to get accurate calculation speed? code:…
張簡麒耀
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