1. Matt McKeever Jonathan Baker UAV Design Team 11/16/2006

2. Air Data Computer Inputs: Outputs: Specifications:
Pneumatic pitot/static data
Electronic signal from outside temperature probe
Outputs:
Mach
Indicated airspeed
True airspeed
Vertical speed
Static air temperature
Total air temperature
Uncorrected pressure altitude
Barometric corrected altitude
Specifications:
Power:  28 V DC, 8 W
Weight: lb

3. Turbofan Engine Management
Input
Fan inlet temperature and pressure
Fan rotor speed (N1)
High-pressure compressor inlet
temperature and pressure
Core rotor speed (N2)
High-pressure compressor exit
temperature and static pressure
Low-pressure turbine blade temperature
Bypass duct static pressure at the mixing plane
Low-pressure turbine exit temperature and static pressure
Results
Good running engine
Engine pressure ratio and other data to pilot

4. Multi-Spectral Data Fusion
Energy of spectral features contained in low frequencies
Energy of spatial features (edges) contained in high frequencies
Multiple narrow spectral sensors provide a better spectral resolution

5. Missile Warning Sensors
Multi-Imaging Multispectral (MIMS)
Two color IR sensor
Eliminates background clutter by using separate IR bands
Weight: under 6.5 lb
Power: 28 VDC, W

6. Navigation Redundant Inertial Reference Systems
Uses a ring laser gyro to sense angular rate about the roll, pitch, and yaw axes
Uses accelerometers to measure linear acceleration in the roll, pitch, and yaw directions
Uses magnetometer to sense direction
Generally 2-3 on board
Cross-checked with one another for accuracy
If available, compared to GPS
Power: 28 V DC, 2-60 W
Weight: 2-30 lb
Flight Management Computer
Does actual cross-checking for IRS’s and GPS
Uses input from Air Data Computer, IRS, GPS, and Enhanced Ground Proximity Warning System to navigate

7. Stereoscopic Imaging
Two cameras spaced apart and focused at the same object
Gives a 3D effect when the images are combined
Can be used to estimate height of vegetation or structures
Ratio of camera-to-camera distance and camera-to-subject distance needs to be greater than 1/400 to retain stereoscopic effects.
Greater than 1/80 is ideal

8. Terrain Collision Avoidance
Enhanced Ground Proximity Warning System
Sends warning if projected path
will collide with the terrain
Accesses database of terrain
Incorporates sink rate
Altitude is inputted
Radar altimeter
Indicates distance from
ground to aircraft
Important in landing
Landing Warnings
If LG and/or flaps are not down, and radar altimeter or air data computer senses below 2500 ft, pilot is warned of the situation
If sink rate is too high and radar altimeter senses a very low altitude, pilot is warned they are sinking too fast

9. Sensor Fusion and Design Teams
AIAA:
Flight and engine computers will most likely be required
Possible integration of anti-missile technologies
Majority of sensors are not large or heavy
HPA:
No real need for sensor fusion, or sensors in general
Must be able to shave as much weight as possible
UAV:
Platform is designed and built around advanced sensor technologies
Space and payload are very limited
A stable aircraft is desired for aerial photography

10. Conclusions Adds reliability and safety to the aviation community
Adds new and exciting reconnaissance and surveillance capabilities
Provides redundancy and accuracy

11. References http://digilander.libero.it/andreatheone/irs.htm