Chassis Interfaces

Interface to Plane

Small Passenger Aircraft RIT U.A.V. Airframe “C”

Mountable to a flat plate Mountable to a flat wooden base

Smaller than a person; Approx 2’ x 2’ x 5’6” tall

Less than 16” x 6.5” x 5” tall

Less than 150lbs (68kg) Less than 15lbs (6.8kg)

Chassis Interfaces

Interface to Plane• 10.25” Long• 6” Wide• 6.5” Tall• 10.9lbs

Chassis Interfaces

Interface to Plane

Component Weight (lbs)

Electronics 0.91

Electronics Enclosure 3.43

Optics 2.15

Optics Enclosure 4.32

Total 11 lbs (Approximate)

Chassis Interfaces

D3 OEM BoardNovAtel OEMV-3FPGA BoardConnector BoardSolid State Hard Drive (Not Pictured)

Chassis Interfaces

Chassis InterfacesCamera BoardsLinos Mevis-C Lenses (16 mm)

MicroStrain IMU

Chassis Interfaces

Vibration Damping

Two sources of need:1.Insure structural integrity under vibration2.Minimize image distortion

Item 1 must be tested for, but item 2 can be calculated and designed for.

Vibration Damping

• Characterized per RTCA DO-160• Frequency Range: 5 – 500 Hz• Amplitude Range: 0.00001 – 0.1 inches• 3 Primary Axes

Vibration Damping

• Image distortion depends on:– Aircraft Speed– Aircraft Altitude– Lens Image Angle– Shutter Speed

Vibration Damping

• Speed induced byvibration taken as derivative of vibration motion profile

• Profile:X = A·sin(F·t)

• Speed:X’ = A·F·cos(F·t)

Vibration Damping

• Maximum Aircraft Speed: 36 m/s• Maximum Vibration Speed: 1.27 m/s

Altitude (ft) Speed Distortion (Pixels)

Vibration Distortion (Pixels)

1000 0.66 0.02331500 0.44 0.01552000 0.33 0.01165000 0.13 0.0047