AHRS-8 データシート
Product Data Sheet
AHRS-8
Attitude Heading Reference System
Description
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The AHRS-8 is a fully temperature compensated Attitude Heading Reference System (AHRS), individually calibrated over the -40 to +70 C
operating range. It delivers industry leading heading accuracy in a broad range of challenging dynamic and magnetic environments.
Proprietary state-of-the-art AdaptNav II™ algorithms allow the AHRS-8 to provide accurate attitude and heading outputs, including full
360° tilt compensation, even when subject to highly dynamic harsh operating environments and in the presence of transient magnetic
interference. AdaptNav II™ also includes enhanced adaptive in-field calibration algorithms to provide superior system performance, even
in the presence of magnetic distortions due to ferrous objects and mechanical vibrations within the mounting platform. The AHRS-8
incorporates the World Magnetic Model allowing it to provide a True North output at all locations around the globe and is fully pinfor-pin compatible with the Sparton DC-4 and GEDC-6. The AHRS-8 also incorporates NorthTek™, Sparton’s on-board programming
environment, making it the world’s only fully programmable and user-configurable AHRS. NorthTek™ provides users virtually limitless
product customizations and integration flexibility.
Features
• Integrated AdaptNav™ adaptive algorithms provide realtime optimization of sensor performance when used in
dynamic operating environments
•Integrated AdaptNav II™ provides real-time noise
characterizations used for drift compensation of
heading, pitch and roll in electrically and mechanically
noisy environments
• Fully temperature compensated over the entire operating
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range, individually calibrated from -40 to +70 C
• Powerful user programmable sensor customization apps
via NorthTek™ Forth interpreter
• 2D and 3D adaptive in-field cal providing hard and soft
magnetic interference compensation
• Advanced sensing technology (3-axis magnetic, 3-axis
MEMS acceleration, and 3-axis MEMS gyro)
• Selectable 4g or 8g accelerometer ranges, suitable for
highly dynamic application environments
•Built-in world magnetic model for accurate True
North heading
• Rugged (epoxy encapsulated) construction and small
physical size
• Magnetic and True North heading (yaw), pitch, and
roll measurement
• Full 360° rollover capability
•Low power consumption and power management
(Sleep Mode) functionality
• Supports multiple communication protocols
AHRS-8.06
Typical Applications
• Complex platforms with motors/electrical noise
• Platform stabilization and positioning, antenna pointing
• Laser range finders and optical targeting systems
• Accurate attitude position and orientation sensing
• Precision autonomous unmanned vehicle guidance
• Applications with extreme temperature ranges
14
1.114
28.296
NORTH DIRECTION
ISOMETRIC VIEW
FOR VISUAL AID ONLY
.079
2
.079
2
.635
16.136
.557
14.148
.430
10.922
.025
0.635
7
.079
2
1.112
28.251
.400
10.160
.011
0.279
1.114
28.296
.079
2
.079
2
.079
2
.800
20.320
.158
4.013
8X
.020
0.508
7
Product Data Sheet
AHRS-8
Specifications
Dynamic Heading Accuracy
Static Heading Accuracy
Heading Repeatability
Dynamic Pitch/Roll Accuracy
Static Pitch/Roll Accuracy
Pitch/Roll Repeatability
Pitch/Roll Range
Accelerometer Range (Selectable) 2
Accelerometer Noise Density
Accelerometer Bias Stability
Accelerometer Velocity Random Walk (VRW)
Gyro Dynamic Range (Selectable)
Gyro Noise Density
Gyro Bias Stability
Gyro Angular Random Walk (ARW)
Magnetic Range
Maximum Magnetic Inclination (Dip)
Update Rate (Samples/Sec)
Baud Rate
Dimensions L x W x H
Mass
Encapsulated or Enclosure
Operating and Storage Temperature
Humidity Resistance
Shock Resistance
Vibration Resistance
.430
10.922
Power Supply Input (Unregulated Voltage)
Input Power, Operating Mode (Typical @ 4V)
Input Power, Sleep Mode (Typical @ 4v)
3.3V Logic UART Interface
2D and 3D In-Field Calibration
Able To Maintain Function When Inverted
Quaternion/Rotation Matrix Output
True North Heading Output
NorthTek™ User Programmable Customizations
Includes World Magnetic Model
Fully Temperature Compensated
Pin Connectivity Gold Plating
Individually Calibrated Over Temperature Range
(-40° to +70° C)
RoHS Compliant
1.0° RMS 1
0.2° RMS (<1.0° RMS from -40° to +70° C)
0.1° RMS
1.0° RMS1
0.2° RMS
0.1° RMS
± 90°, ± 180°
+/- 4g or +/- 8g (+/- 1g) 3
126 µg/√Hz
0.023 mg
0.063 m/s
± 480°/sec (± 300°/sec) 3
0.03 dps/√Hz
10.8°/Hr
1.5 deg/Sqrt[Hr]
±1.2 Gauss (±900 MGauss) 3
± 80°
100
0.3, 1.2, 2.4, 4.8, 9.6; 19.2;
38.4; 57.6; 115.2 kbaud
42 x 28 x 11 mm
(1.66 x 1.11 x 0.43 inches)
16g
Yes
-40° to +85° C
95%, 70° C, 240 hrs Meets
.635
.079
MIL-STD-202G
– Method 103A,
Test Condition A
16.136
2
1500g, 1ms Pulse, Half-Sine Wave.079Meets
2
.079
MIL-STD-202G – Method 213B, Test Condition
F
2
.06 dB Power Spectral Density, 9.26 G RMS Meets
MIL-STD-202G – Method 214A, Test Condition I/C
+4 to +10V DC
330.025mW
0.635
.158
16W
.011
4.013
0.28
8X .020
Yes
0.508
.079
Yes
2
.079
2
Yes
.079
2
Yes
Yes
Yes
Yes
Yes
Meets MIL-G-45204 Type III Class 4
Yes
Yes
Pin # Pin Name
I/O Function
P1-1
O
P1-2
P1-3
P1-4
P1-5
P1-6
P1-7
V_TEST
3.3V regulator output for
test purposes (factory use only)
DEBUG_RXD I
3.3V logic RXD Input to
Debug Port (factory use only)
DEBUG_TXD O
3.3V logic TXD Output from
Debug Port (factory use only)
N/A Pin removed for keying
#WP_EEPROM I
3.3V logic, active-low EEPROM
write protect (the pin has 10kΩ pull-down)
Factory Use
I
Do not connect (factory use only)
.557
GND
N/A System Ground
14.148
P2-1
V+
P2-2
P2-3
P2-4
USER_RXD
USER_TXD
#RESET
P2-5
#EINT0
P2-6
P2-7
GND
GND
.400
10.160
1.114
28.296
I
.800
+4 to +10V DC power supply input. 20.320
Max load = 80mA
I
3.3V logic RXD input to User Com Port
O
3.3V logic TXD output from User Com Port
I
3.3V logic, active-low reset input
(the pin has a weak pull-up)
I
3.3V logic, active-low interrupt input
(the pin has a weak pull-up).
Used for programming purposes
N/A System Ground
N/A System Ground
PIN 4 REMOVED FOR KEYING
7 6 5 4 3 2 1
P1
1.112
28.251
7 6 5 4 3 2 1
P2
1.668
42.374
.635
16.136
.079
2
.079
2
.079
2
.430
10.922
1.112
28.251
.025
0.635
.158
4.013
.011
0.28
.079
2
8X .020
0.508
.079
2
.079
2
Dynamic heading accuracy derived from Scorsby table set for 7 RPM, 30° of inclination.
Note selection of the high range mode for the accelerometers results in decreased sensitivity, but also offers increased dynamic range.
Consequently, optimal mode selection is dependent upon the intended application and associated linear accelerations present.
3
Specifications in parentheses represent current limits of calibration methodology.
Specifications subject to change without notice.
Performance data applies to 20° C, 0g Acceleration for Pitch/Roll unless otherwise specified.
For more information and detailed specifications scan QR code.
For support, please e-mail: [email protected]
1
2
5612 Johnson Lake Road
De Leon Springs, FL 32130
800.824.0682 or 386.985.4631
www.spartonnavex.com
AHRS-8.06
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