AHRS-E304 Watson Industries, Inc
09/06/05
5
attitude and conditions are outside of a reasonable range. This system also directly depends on
the quality of the velocity signal.
SPECIFICATIONS
1) Output range and scale factor
- Pitch Rate
±100º/s (10º/s/V) (Positive for Nose Up)
- Roll Rate
±100º/s (10º/s/V) (Positive for Roll to Right)
- Yaw Rate
±100º/s (10º/s/V) (Positive for Right Turn)
- Heading Rate
±100º/s (10º/s/V) (Positive for Right Turn)
- Bank
±180º (18º/V) (Positive for Bank to Right)
- Elevation
±90º (18º/V) (Positive for Nose Up)
- South Heading
0-360º (18º/V)
(North = ±10V; East = -5V; South = 0V; West = +5V)
- North Heading
0-360º (18º/V)
(South = ±10V; West = -5V;North= 0V; East = +5V)
2) Rate Accuracy
Static ±0.2º/sec; Dynamic ±2%
3) Attitude Accuracy*
Static ±0.5º; Dynamic ±2%
4) Heading Accuracy*
Static ±1º; Dynamic ±2%
5) Velocity Input
-800 to +800 Km/hr. (-10 to +10 Volts) Forward Velocity
6) Temperature
- Operating
-30º to +60º C
- Storage
-40º to +85º C
7) Weight
32 Ounces
8) Power
about 350 milliamps at 12 Volts DC (200 milliamps at 24 VDC)
9) Error correction time constant is about 15 seconds
(error correction is reduced or switched off during extreme maneuvers)
10) Error growth when error correction is switched off will be about 0.03º/second
11) No attitude limits
(however, errors are likely to grow rapidly within 5º of vertical in elevation)
*Assumes accurate velocity data
