About Our IMU & AHRS

Advanced Navigation is a leading manufacturer of Inertial Measurement Units (IMU) and Attitude and Heading Reference Systems (AHRS). Our solutions combine temperature-calibrated accelerometers, gyroscopes, and magnetometers with an AI-based fusion algorithm to deliver accurate and reliable orientation.

Looking for higher performance? All our INS offer IMU & AHRS capabilities.

Why Choose Advanced Navigation

High Performance

Our systems deliver the highest performance and richest feature set on the market. We back our performance claims with free product trials.

Trusted Reliability

All our systems are designed and tested to safety standards with fault tolerance built in to provide you with the highest reliability possible. Our reliability is trusted by many of the world’s largest companies.

Quality

Our systems are built to the highest quality standards in Australia to endure the test of time in the most difficult conditions. You can rely on our products.

Our Solutions

Orientus

Rugged and cost-effective IMU

Roll & Pitch
0.2 °
Heading (Magnetic)
0.8 °
Bias Instability
3 ° / hr
Update Rate
1000 Hz
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Motus

Ultra-high accuracy MEMS IMU

Roll & Pitch
0.05 °
Heading (Magnetic)
0.8 °
Bias Instability
0.2 ° / hr
Update Rate
1000 Hz
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They Trust Us

Case Studies

Common Questions

What is an AHRS?

AHRS stands for Attitude and Heading Reference System. 

Attitude refers to an object’s orientation relative to the horizontal plane that is parallel to the horizon. This is often described as pitch and roll. 

Heading is the direction a vessel is pointing towards relative to True North.

An AHRS is often used in aircraft and can also be used as a navigation aid for ground-based robots. Other uses for AHRS include measuring human movement by sports scientists. 

Why use an AHRS ?

AHRS are often made from micro-electromechanical systems, or MEMS. Therefore the compact and lightweight nature of an AHRS allows it to be used in vessels that require a small SWaP-C (size, weight, power and cost). 

This small SWaP-C makes AHRS ideal for unmanned aerial vehicles (UAV) which need accurate measurements but can’t carry an instrument that is heavy or bulky. 

Typically an AHRS is used for: 

  • Surveying 
  • Autonomous manufacturing robots
  • Underwater navigation
  • Surface marine navigation
  • Tracking human movement for sports science

How does an AHRS work?

An AHRS is comprised of IMUs (inertial measurement unit) on three orthogonal axes (commonly referred to as X, Y and Z). Typically these IMUs contain: 

  • Accelerometers
  • Gyroscopes
  • Magnetometers

Accelerometers measure the linear force acting on the vehicle. This includes gravity, which is used to determine the orientation of the vehicle with respect to the centre of the Earth. 

Gyroscopes measure the rotational force acting on the vehicle.  

Magnetometers measure magnetic fields. If the position of the vehicle is known, the vehicle heading relative to magnetic north can be determined. Heading relative to True North can also be found due to the known declination value.

Additional sensors can be incorporated to assist an AHRS. A common addition is the use of a dual antenna GNSS receiver (global navigation satellite system). By using two GNSS antennas the vehicle heading can be determined to a much higher accuracy. 

If minimal SWaP-C is not required, higher accuracy gyroscopes based on fiber optic technologies (FOG) can dramatically increase attitude and heading accuracy.

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