Aerospace & Defense Technology - May 2022 - 31

Tech Briefs
Experimental Assessment of Entanglement for an Unmanned
Underwater Vehicle with an Open, Three-Bladed Propeller
The entanglement of unmanned underwater vehicles (UUV) propelled by open propellers while operating
in marine vegetation native to littoral environments can be a threat to mission accomplishment.
Naval Postgraduate School, Monterey, California
T
his research evaluates the entanglement
of an unmanned underwater
vehicle (UUV) operating in marine vegetation
common to littoral environments.
Entanglement was assessed for a traditional
UUV with an open, three-bladed
propeller transiting a vegetation field at a
constant heading and depth. Factors
such as the vegetation density, vegetation
placement and configuration, propeller
revolutions per minute (RPM), and
vehicle speed were varied to determine
their impact on vehicle entanglement.
Results provide insight to the mechanism
of entanglement and operating conditions
that result in a high or low likelihood
of entanglement. These results are
of particular interest to the Department
of Defense as the military's use of UUVs
in littoral environments becomes more
prevalent.
Experimental tests were conducted in a
tow tank located at the Naval Postgraduate
School. Synthetic eelgrass and synthetic
giant kelp plants anchored to a
plate located at the bottom of the tow
tank were used to simulate marine vegetation
common to the littorals. The UUV
tested in this work was an early variant of
the Remote Environmental Measurement
UnitS (REMUS) 100 manufactured
by Hydroid. The REMUS 100 was attached
Rugged, Programmable, High-Speed
SERIAL INTERFACES
V1161 Programmable 100G Ethernet XMC ACAP Card
Designed for critical interface applications requiring 10/25/40/50/100Gbs Ethernet.
Features
NVIDIA® Mellanox® ConnectX®-5 network interface device
Xilinx® Versal™ VM1502/VM1802 ACAP (FPGA)
Dual 10/25/40/50/100Gbs Ethernet ports
Rugged optical ports via front panel or backplane
Electrical I/O via Pn6 also available
Performs as a low-latency, high-bandwidth Ethernet interface card with
FPGA-based application coprocessor
V1153 12-Port Rugged XMC FPGA Card
Designed for rugged high-bandwidth networking and interface applications.
Features
Up to 12 optical ports capable of 10Gbs/port (or 8 ports 10-25Gbs)
Xilinx®
UltraScale™
KU095 or UltraScale+™
VU3P FPGA
Rugged high-speed interface and coprocessing card
Supported Protocols
Ethernet
Fibre Channel
sFPDP
ARINC 818
Aurora
Custom
to a movable carriage located on top of
the tow tank using a vertical sting and
custom-made adapter. This configuration
allowed the REMUS 100 to self-propel
itself, and the attached movable carriage,
down the tank at a constant depth and
heading. Vehicle speed and direction of
travel (forward versus astern) was adjusted
by changing the propeller RPM of the
REMUS 100. A position sensor was used
to correlate propeller RPM to the vehicle's
steady state speed and to determine
the vehicle's speed as a function of position
(accelerating speed).
Three different entanglement tests
were conducted: a vegetation density
Interested inInterested in
Learning More? Learning More?
New Wave
  
www.newwavedv.com
Tel: +1.952.224.9201
info@newwavedv.com
Aerospace & Defense Technology, May 2022
Free Info at http://info.hotims.com/82321-785
31
ADT Tech Briefs 0522_1.indd 31
Intro
Cov
ToC
+
-
A
µ
4/26/22 2:12 PM
È
http://info.hotims.com/82321-785 http://info.hotims.com/82321-785 http://info.hotims.com/82321-785 http://info.hotims.com/82321-830

Aerospace & Defense Technology - May 2022

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

Aerospace & Defense Technology - May 2022 - Intro
Aerospace & Defense Technology - May 2022 - Cov 4
Aerospace & Defense Technology - May 2022 - Cov 1
Aerospace & Defense Technology - May 2022 - Cov 2
Aerospace & Defense Technology - May 2022 - 1
Aerospace & Defense Technology - May 2022 - 2
Aerospace & Defense Technology - May 2022 - 3
Aerospace & Defense Technology - May 2022 - 4
Aerospace & Defense Technology - May 2022 - 5
Aerospace & Defense Technology - May 2022 - 6
Aerospace & Defense Technology - May 2022 - 7
Aerospace & Defense Technology - May 2022 - 8
Aerospace & Defense Technology - May 2022 - 9
Aerospace & Defense Technology - May 2022 - 10
Aerospace & Defense Technology - May 2022 - 11
Aerospace & Defense Technology - May 2022 - 12
Aerospace & Defense Technology - May 2022 - 13
Aerospace & Defense Technology - May 2022 - 14
Aerospace & Defense Technology - May 2022 - 15
Aerospace & Defense Technology - May 2022 - 16
Aerospace & Defense Technology - May 2022 - 17
Aerospace & Defense Technology - May 2022 - 18
Aerospace & Defense Technology - May 2022 - 19
Aerospace & Defense Technology - May 2022 - 20
Aerospace & Defense Technology - May 2022 - 21
Aerospace & Defense Technology - May 2022 - 22
Aerospace & Defense Technology - May 2022 - 23
Aerospace & Defense Technology - May 2022 - 24
Aerospace & Defense Technology - May 2022 - 25
Aerospace & Defense Technology - May 2022 - 26
Aerospace & Defense Technology - May 2022 - 27
Aerospace & Defense Technology - May 2022 - 28
Aerospace & Defense Technology - May 2022 - 29
Aerospace & Defense Technology - May 2022 - 30
Aerospace & Defense Technology - May 2022 - 31
Aerospace & Defense Technology - May 2022 - 32
Aerospace & Defense Technology - May 2022 - 33
Aerospace & Defense Technology - May 2022 - 34
Aerospace & Defense Technology - May 2022 - 35
Aerospace & Defense Technology - May 2022 - 36
Aerospace & Defense Technology - May 2022 - 37
Aerospace & Defense Technology - May 2022 - 38
Aerospace & Defense Technology - May 2022 - 39
Aerospace & Defense Technology - May 2022 - 40
Aerospace & Defense Technology - May 2022 - 41
Aerospace & Defense Technology - May 2022 - 42
Aerospace & Defense Technology - May 2022 - 43
Aerospace & Defense Technology - May 2022 - 44
Aerospace & Defense Technology - May 2022 - 45
Aerospace & Defense Technology - May 2022 - 46
Aerospace & Defense Technology - May 2022 - 47
Aerospace & Defense Technology - May 2022 - 48
Aerospace & Defense Technology - May 2022 - Cov 3
Aerospace & Defense Technology - May 2022 - Cov 4
https://www.nxtbook.com/smg/techbriefs/24ADT10
https://www.nxtbook.com/smg/techbriefs/24ADT09
https://www.nxtbook.com/smg/techbriefs/24ADT08
https://www.nxtbook.com/smg/techbriefs/24ADT06
https://www.nxtbook.com/smg/techbriefs/24ADT05
https://www.nxtbook.com/smg/techbriefs/24ADT04
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
https://www.nxtbook.com/smg/techbriefs/23ADT08
https://www.nxtbook.com/smg/techbriefs/23ADT06
https://www.nxtbook.com/smg/techbriefs/23ADT05
https://www.nxtbook.com/smg/techbriefs/23ADT04
https://www.nxtbook.com/smg/techbriefs/23ADT02
https://www.nxtbook.com/smg/techbriefs/22ADT12
https://www.nxtbook.com/smg/techbriefs/22ADT10
https://www.nxtbook.com/smg/techbriefs/22ADT09
https://www.nxtbook.com/smg/techbriefs/22ADT08
https://www.nxtbook.com/smg/techbriefs/22ADT06
https://www.nxtbook.com/smg/techbriefs/22ADT05
https://www.nxtbook.com/smg/techbriefs/22ADT04
https://www.nxtbook.com/smg/techbriefs/22ADT02
https://www.nxtbook.com/smg/techbriefs/21ADT12
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
https://www.nxtbook.com/smg/techbriefs/21ADT02
https://www.nxtbookmedia.com