Aerospace & Defense Technology - October 2022 - 36

Tech Briefs
regular and irregular waves. The measurements
made during testing include:
1. Resistance, sinkage, and trim measurements
for the model in calm
water over a range of speeds.
2. Six degree-of-freedom (DOF) forces and
moments acting on the model over a
range of speeds and wave conditions.
3. Model motions and accelerations
over a range of speeds and wave conditions.
4.
Impact pressures over a range of locations
on the model at different speeds
and wave conditions for model validation.
This
research focuses on the results
from testing in waves.
Measurements of the Athena model
operating in calm water, regular, and
irregular waves were performed in the
Deep Water Basin at NSWCCD using
towing Carriage 2. The basin is approximately
1886 feet long, 51 feet wide,
and 22 feet deep. Carriage 2 has a maximum
towing speed of 20 knots (33.8
ft/s). A pneumatic wavemaker is located
at the east end of the basin, with a wave
absorbing beach at the west end.
Model 5365 is an 8.25 scale model of
the R/V Athena, shown in the accompanying
figure. The R/V Athena is a converted
PG-84 Asheville-class patrol gunboat,
which is operated out of Naval Surface
Warfare Center - Panama City Division as
a high-speed research vessel. The model,
built in 1979, was constructed out of
wood and fiberglass. The model has been
refurbished over its lifetime. As part of its
2015 refurbishment, the tow-point of the
model was moved to align with the center
of mass. This translation of the towpoint
allows for a more accurate representation
of full-scale motions, more
comparable measurements to the CFD
simulations, and increased model performance
in large waves.
Full Scale R/V Athena
This work was performed by Anne
Fullerton, Jayson Geiser, Sarah Punzi,
Jason Morin, Charles Weil, Don Walker,
Evan Lee, Minyee Jiang, Van Lien,
and Craig Merrill for the Naval Surface
Warfare Center. For more information,
download the Technical
Support Package (free white paper)
at mobilityengineeringtech.com/tsp
under the Data Acquisition category.
NSWC-0005
Optimal UAS Assignments and Trajectories for
Persistent Surveillance and Data Collection from a
Wireless Sensor Network
Developing a methodology for multiple unmanned aircraft assigned to fly optimal trajectories in order to
survey and collect a pre-specified amount of data from a fixed, ground-based wireless sensor network.
Air Force Institute of Technology, Wright-Patterson Air Force Base, Ohio
T
he Department of Defense (DoD)
estimates manpower cost is the largest
component in the operation of
Unmanned Aircraft Systems (UAS).
From planning, controlling, supervising,
analyzing, replanning, delivering
data, and other functions, the human
operator currently bares the majority of
the burden for these tasks.
The most critical phases of mission profiles
are often either manually performed
or pre-programmed by human operators.
These functions " include critical flight
operations, navigation, takeoff and landing
of unmanned aircraft, and recognition
of lost communications requiring implementation
of return-to-base procedures. " .
Furthermore, UAS that conduct Intelligence,
Surveillance, and Reconnaissance
(ISR) missions often collect and deliver
raw data. For example, live streaming
36
UAS
Groups
Group 1
Maximum
Weight (lbs)
(MGTOW)
0 - 20
Normal
Operating
Altitude(ft)
<1200 AGL
Speed
(kts)
100
Raven (RQ-11).
WASP
ScanEagle
Group 2
21 - 55
<3500 AGL
<250
Shadow
Group 3
<1320
< FL 180
Group 4
>1320
Group 5
> FL 180
DoD groupings of UAS by size and performance
mobilityengineeringtech.com
Any
Airspeed
Fire Scout (MQ-8B), RQ-8B),
Predator (MQ-1A/B),
Sky Warrior ERMP (MQ-1C)
Reaper (MQ-9A),
Global Hawk (RQ-4),
BAMS (RQ-4)
MQ-1/Predator
Shadow (RQ-78)
Tier II /STUAS
ScanEagle
Representative UAS
Raven
RQ-4/Global Hawk
Aerospace & Defense Technology, October 2022
http://mobilityengineeringtech.com/tsp http://www.mobilityengineeringtech.com

Aerospace & Defense Technology - October 2022

Table of Contents for the Digital Edition of Aerospace & Defense Technology - October 2022

Aerospace & Defense Technology - October 2022 - Intro
Aerospace & Defense Technology - October 2022 - Sponsor
Aerospace & Defense Technology - October 2022 - Cov1
Aerospace & Defense Technology - October 2022 - Cov2
Aerospace & Defense Technology - October 2022 - 1
Aerospace & Defense Technology - October 2022 - 2
Aerospace & Defense Technology - October 2022 - 3
Aerospace & Defense Technology - October 2022 - 4
Aerospace & Defense Technology - October 2022 - 5
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Aerospace & Defense Technology - October 2022 - 7
Aerospace & Defense Technology - October 2022 - 8
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Aerospace & Defense Technology - October 2022 - 36
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Aerospace & Defense Technology - October 2022 - 48
Aerospace & Defense Technology - October 2022 - Cov3
Aerospace & Defense Technology - October 2022 - Cov4
https://www.nxtbook.com/smg/techbriefs/24ADT02
https://www.nxtbook.com/smg/techbriefs/23ADT12
https://www.nxtbook.com/smg/techbriefs/23ADT10
https://www.nxtbook.com/smg/techbriefs/23ADT09
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https://www.nxtbook.com/smg/techbriefs/22ADT12
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https://www.nxtbook.com/smg/techbriefs/22ADT09
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https://www.nxtbook.com/smg/techbriefs/22ADT04
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https://www.nxtbook.com/smg/techbriefs/21ADT10
https://www.nxtbook.com/smg/techbriefs/21ADT09
https://www.nxtbook.com/smg/techbriefs/21ADT08
https://www.nxtbook.com/smg/techbriefs/21ADT06
https://www.nxtbook.com/smg/techbriefs/21ADT05
https://www.nxtbook.com/smg/techbriefs/21ADT04
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