3DM-GX3-25 Miniature Attitude Heading Reference System (AHRS)

MicroStrain's inertial, orientation and inclinometer product line includes simple inclinometers, commonly referred to as tiltmeters or clinometers, inertial measurement units (IMU) and attitude heading reference systems (AHRS).

These products can provide single axis or dual axis inclination, linear acceleration and angular rate, or orientation in the form of pitch, roll and heading (yaw or azimuth) Quaternion or orientation matrix.

UPDATE:

There is a typo in the 3DM-GX-series data sheets regarding the Gyro Bias stability. 

It should read: Gyro Bias Instability: +/-0.01°/sec

Features and Benefits

• Smallest and lightest AHRS available on the market, with versions weighing only 11.5 grams
• Fully temperature compensated over entire -40° to +75°C operational range
• Calibrated for sensor misalignment, gyro G-sensitivity, and gyro scale factor non-linearity
• Improved navigation under vibration, as sensors are sampled at 30 kHz and digitally filtered and scaled into physical units; coning and sculling integrals are computed at 1 kHz
• Available with RS-232, USB 2.0 and TTL serial communication interfaces
• User adjustable data rate, 1 to 1000 Hz
• Outputs Euler angles, rotation matrix, deltaAngle & deltaVelocity, acceleration angular rate and magnetic field
   

Introduction

3DM-GX3-25™ is a high-performance miniature Attitude Heading Reference System, utilizing MEMS sensor technology. It combines a triaxial accelerometer, triaxial gyro, triaxial magnetometer, temperature sensors, and an on-board processor running a sophisticated sensor fusion algorithm to provide static and dynamic orientation, and inertial measurements.

It offers a range of output data quantities from fully calibrated inertial measurements (acceleration, angular rate and magnetic field or deltaAngle & deltaVelocity vectors) to computed orientation estimates, including pitch, roll and heading (yaw) or rotation matrix. All quantities are fully temperature compensated and are mathematically aligned to an orthogonal coordinate system. The angular rate quantities are further corrected for G-sensitivity and scale factor non-linearity to third order.

The 3DM-GX3-25™ AHRS is available with RS-232, USB 2.0 and TTL serial communication interfaces and is a member of the 3DM-GX3™ family of inertial sensors.

Applications

• Inertial aiding of GPS
• Location tracking of personnel
• Unmanned vehicles, navigation, artificial horizon
• Computer science, biomedical animation, linkage free tracking/control
• Platform stabilization
• Antenna and camera pointing
• Robotics