Bottom Crash Test; 2.399K(Video Credit: Rutgers)
Glider Up at the Surface; 4.769K (Video Credit: Rutgers)
Glider Flying; 3.879K (Video Credit: Rutgers)
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Versatile, maneuverable and powered with alkaline batteries, the electric glider can be deployed for a period of 15 to 30 days at a 600- to 1500-km range. Its flexible payload allows it to carry customized sensors. The coastal glider can be operated to depths of 4–200 meters and the 1-km glider to 1000 meters.
- Weight: 52 kg
- Hull Diameter: 21.3 cm
- Vehicle Length: 1.5 meters
- Depth Range: 4–200 meter (coastal model) or 1000 meter (1-km model)
- Speed: 0.4 m/sec horizontal average
- Endurance: Typically 30 days, depending on measurements and communication
- Range: 1500 km
- Navigation: GPS, magnetic compass, altimeter, subsurface dead reckoning
- Sensor Package: Conductivity, Temperature, Depth
- Communications: RF modem, Iridium satellite, ARGOS,
The principle advantages of Autonomous
Underwater Vehicle Gliders (AUVGs) are:
- Very suitable for long-range and endurance, if low to
moderate speed is acceptable.
- The sawtooth profile is optimal for both vertical and
horizontal observations in the water column.
- Regular surfacing is excellent for capturing GPS and two-way
communication. No other navigational aids are required and
the system is very portable.
Gliders are unique in the AUV world, in that the forward propulsion
is created by varying vehicle buoyancy. Wings and control surfaces
convert the vertical velocity into forward velocity so that the
vehicle glides downward when denser than water and glides upward
when buoyant (Fig 1). Gliders require no propeller and operate
in a vertical sawtooth trajectory.
1. Force balance diagram of forces acting on Glider, angle of
attack not included.
Navigation and Flight
The Slocum Battery Glider dead reckons to waypoints, inflecting
at set depths and altitudes based on a mission text file. As
set by the mission, the Glider periodically surfaces to communicate
data and instructions and to obtain a GPS fix for location. Any
difference in dead reckoning and position is attributed to current,
and that knowledge is used on the subsequent segment.