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AHRS - Attitude & Heading Reference Systems


 
General 
Product Name:AHRS - Attitude & Heading Reference Systems
Product Description:Affordable price: less than $4K for very precise AHRS solution. The Inertial Labs Attitude and Heading Reference Systems, AHRS-II is the next generation of enhanced, high-performance strapdown systems that determines absolute orientation (Heading, Pitch and Roll) for any device on which it is mounted. Orientation is determined with high accuracy for both motionless and dynamic applications. The Inertial Labs AHRS-II solutions utilises three axes each of precision accelerometers, magnetometers and gyroscopes to provide accurate Heading, Pitch and Roll of the device under measure. Integration of gyroscopes’ output provides high frequency, real-time measurement of the device rotation about all three rotational axes. Accelerometers and Fluxgate magnetometer measure absolute Pitch, Roll and gyro-magnetic Azimuth at AHRS initial alignment as well as providing ongoing corrections to gyroscopes during operation.
Type of application:Air, Land, Marine
Year of initial development:2005
Height [m]:0.53
Width [m]:0.50
Length [m]:0.120
Weight [kg]:0.28
Min. Voltage (AC):9
Max. Voltage (AC):36
Min. Voltage (DC):9
Max. Voltage (DC):36
Power consumption [W]:1.4
Splashproof casting:Y
Water resistant casting:Y
Water resistance [m]:5
Mean time between failures [hr]:55000
Type of accelerometer:Advanced MEMS
Type of gyro:Advanced MEMS
Removable from base plate:N
Moving parts:N
Environmental 
Non-operating shock tolerance [g]:2000
Operating shock tolerance [g]:400
Min. operating temperature [C]:-40
Max. operating temperature [C]:75
Max. rotation speed [deg/s]:450
Data formats 
NMEA formats:Yes, 0183
RTCM:Y
Other :TSS1, ASCII
GNSS Positioning Sensor 
Number of integrated GNSS receivers and antenna ports:
No. channels p receiver:
Tracked satellite signals:
SBAS differential signals:
RTK Network Compatibility:
Update rate [ Hz ]:
Cold start [ seconds ]:
Hot start [ seconds ]:
GNSS positional accuracy 
Horizontal Position Accuracy [ RMS in cm ] :
Horizontal Position Accuracy (SBAS) [ RMS in cm ]:
Horizontal Position Accuracy (RTK) [ RMS in cm ]:
GNSS aided uncertainty 
Heading [deg]:0.3
Pitch [deg]:0.1
Roll [deg]:0.1
Heave: constant part [m]:0.05
Heave: variable part [%]:5
Surge/sway [m]:0.05
Increase in position uncertainty w.r.t. stand-alone GPS [m]:0.04
EM log aided uncertainty 
Heading [deg]:
Pitch [deg]:
Roll [deg]:
Heave [m]:
Surge/sway [m]:
Decrease in position accuracy [m/hr]:
Doppler log aided uncertainty 
Heading [deg]:
Pitch [deg]:
Roll [deg]:
Heave [m]:
Surge/sway [m]:
Decrease in position accuracy [m/hr]:
Unaided uncertainty 
Heading [deg]:
Pitch [deg]:
Roll [deg]:
Heave [m]:
Surge/sway [m]:
Decrease in position accuracy [m/hr]:
Inertial Measurement Unit 
Accelerometer bias [µ-g]:5
gyro bias [deg/hr]:1
Calibration procedure:Optional: (2D, 2D2T, 3D)
Software 
Name:Inertial Labs demo software
Filtering:Y
Adaptable filter strength:
Adaptable input signals:
Integrity monitoring of position input:
Integrity monitoring of log input:
Max. number of position input signals:
Max. number of log input signals:
Maximum latency of position input [ms]:
Maximum latency of log input [ms]:
Uncertainty indicators given in output:
Uncertainty of time stamp for output [ms]:
Other specifications 
Export restrictions:No, commercial ECCN 7A994 without export license and End-User/End-Use statement requirements
Graphical user interface:Y
Typical application:ROV, UAV, Land Vehicles, Antennas
Distinguishable features:0.3 deg Heading Accuracy 5 micro g accelerometers 1 deg/hr gyroscopes compact
 


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