Hoboken,
N.J.— Researchers estimate at least 31 million pounds of unexploded and
potentially dangerous bullets, bombs, mines, missiles and chemical munitions
are lurking beneath the oceans off the coasts of at least six U.S. states –
some from as far back as the Civil War, World War I and World War II and others
from more recent military training exercises.
Stevens student innovators are using advanced science and technology
to protect swimmers, divers, vessels and coastal communities from the sudden
detonation of these unexploded ordnances, or UXOs, that are submerged
underwater.
Ethan Hayon, Joe Huyett, Don Montemarano, Mark Siembab,
Michael Giglia and Brandon Vandegrift make up a team of Stevens undergraduate
students who participated in a government program called Perseus, which
challenged five university teams to build underwater vehicles capable of
locating and analyzing inert explosive devices located 40 feet beneath the
water’s surface.
At a demonstration in November at Florida Keys Community
College, the Stevens team of mechanical engineering, naval engineering and
computer science students successfully completed the program mission. They located and identified two inert UXOs
that had been dropped into a dive lagoon by the U.S. Navy’s Explosive Ordnance
Disposal Technology Division.
The Stevens vehicle consists of an aluminum frame with
sealed tubular demihulls holding batteries and critical electronics. The
vehicle uses commercial, off-the-shelf thrusters for propulsion and position
control. Location and identification of UXOs is accomplished through a
network of layered sensors consisting of: imaging SONAR; magnetometer; three
high definition video cameras; and a laser dimensioning system. All of
this sensor data is fed back to a user interface on shore, where along with
other sensor data, it is utilized for navigation, vehicle control, target
identification and positioning.
Communication is handled by a tether to a surface platform
with a wireless link to shore, where the operator maneuvers the vehicle
remotely in three axes. The operator can see live, real-time feeds from
the underwater cameras on a student-designed graphic user interface running
sophisticated computer software. The software analyzes other sensor
inputs, such as target dimension measurements from the lasers and target
composition data from the metal detectors. This information enables the
operator to know the size and makeup of a submerged object, even if visibility
is obstructed, and then analyze what type of munition it is and assess what
threat it poses.
Another unique feature is the autonomous depth control
system, which allows the operator to set the vehicle to ascend or descend to a
certain depth and stay there, moving forward, back and sideways only.
“Our vehicle has great control and runtime and gives us tons
of information and diagnostic data about the targets because of its many
sensors,” said Hayon. “It is also extremely modular so we can add and remove
systems easily.”
“This is an extremely challenging problem, and what the team
came up with was very innovative,” said Michael DeLorme, research associate at
the Davidson Laboratory and the team’s faculty advisor. "To develop a
functional unmanned underwater vehicle (UUV) is challenging in and of itself,
but this group also selected and integrated multiple sensors and devised and
implemented the entire mission plan. That is an extraordinary accomplishment by
an impressive group of young engineers."
The Stevens vehicle cost approximately $15,000 to design and
build over a nine month time period. The students also conducted three
days of testing just prior to the demonstration in Florida, where they made
last-minute adjustments to the vehicle’s waterproofing to cope with the
salinity and pressure of the ocean environment compared to the pools and rivers
where they had previously operated the vehicle.
This is the fourth student group from Stevens that has
participated in a UUV design, develop and demonstrate project for the
Department of Defense and the second straight year a team took part in the
Perseus program, which is organized and funded by the Office of the Secretary
of Defense’s Rapid Reaction Technology Office. The program enables the government
to gain insights into technological innovation from outside the traditional
defense establishment with the potential to quickly meet defense and security
needs. In 2012, the Stevens’ unmanned underwater vehicle was also
successful in that year’s challenge – to disrupt an underwater communications
cable.
The other participating teams in the 2013 program were from
Florida Keys Community College, Florida Atlantic University, Georgia Institute
of Technology and North Carolina Agricultural and Technical State University.
The 2013 Stevens team will continue to work on the vehicle,
with plans to add sonar-based underwater positioning technology and additional
autonomous capabilities.
About Stevens Institute of Technology
Stevens Institute of Technology, The Innovation University®, is a premier,
private research university situated in Hoboken, N.J. overlooking the Manhattan
skyline. Founded in 1870, technological innovation has been the hallmark and
legacy of Stevens’ education and research programs for more than 140 years.
Within the university’s three schools and one college, more than 6,100
undergraduate and graduate students collaborate with more than 350 faculty
members in an interdisciplinary, student-centric, entrepreneurial environment
to advance the frontiers of science and leverage technology to confront global
challenges. Stevens is home to three national research centers of excellence,
as well as joint research programs focused on critical industries such as
healthcare, energy, finance, defense and STEM education and coastal
sustainability. The university is consistently ranked among the nation’s elite
for return on investment for students, career services programs and mid-career
salaries of alumni. Stevens is in the midst of a 10-year strategic plan, The Future. Ours to Create., designed to
further extend the Stevens legacy to create a forward-looking and far-reaching
institution with global impact.