Signals and Communication

First-ever Mason satellite begins its mission

4429684e-ae8d-405e-870a-3b7aefe68162 (Martha Bushong) — Wed, 10 Feb 2021 15:09:50 +0000

First-ever Mason satellite begins its mission 4429684e-ae8d-… Wed, 02/10/2021 - 10:09

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Electrical and Computer Engineering

Volgenau School of Engineering

Volgenau School of Engineering Department of Mechanical Engineering

Signals and Communication

Aerospace

CEC faculty research

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Peter Pachowicz

Join the Launch Party

George Mason University’s first satellite "ASTERIA," part of Mason Engineering’s ThinSat program, successfully passed environmental testing at the Northrop Grumman facility on Wallops Island and was integrated into a deployer. ASTERIA is now ready for launch.

The satellite will be launched on Saturday, February 20 at 12:36 p.m. from NASA’s facility on Wallops Island. Hitching a ride on the Northrop Grumman Antares rocket that is on its way to the International Space Station, the ThinSats will be released from the second stage at around 200 miles altitude. For approximately six days, the ThinSats will orbit Earth before they burn in the atmosphere.

“We have two experiments aboard a single ThinSat as part of mission NG-15,” says Piotr Pachowicz, associate professor in the Department of Electrical and Computer Engineering. “The first experiment will compare two methods for shielding batteries against freezing temperatures in space. The second experiment will compare the efficiency of two power architectures when influenced by satellite spin.”

ASTERIA was a senior design project involving 14 undergraduate students from the Departments of Electrical and Computer Engineering, Mechanical Engineering, and Systems Engineering.

Computer engineering student Jay Deorukhkar worked on several issues that had to be resolved or modified, as well as on system testing. “It was a challenge to ensure all experiments ran correctly and the data was accurate. However, the experience was rewarding,” says Deorukhkar.

Pachowicz has other aspirations for future engineering students. “The long-term goal is to engage senior design students in designing their own satellite and their own path to space,” he says.

The ThinSats will travel aboard an Antares rocket like this when they lift-off on February 20.

The NG-15 ThinSat Virtual Launch Party, organized by Virginia Space, will be held on February 20 at 11 a.m. The virtual event will include presentations from program representatives, a live stream of the launch, and space data dashboard live data monitoring after deployment of ThinSats.

Countdown to launch: Engineering students team up to reach the starry heights with a satellite

284b32ef-f5e4-49b3-b958-e02a665d1125 (Nanci Hellmich) — Tue, 02 Apr 2019 12:46:10 +0000

Countdown to launch: Engineering students team up to reach the starry heights with a satellite 284b32ef-f5e4-… Tue, 04/02/2019 - 08:46

"Everyone owned a piece of the project, which helped manage the workload."

— Lena Elhajj, a senior in systems engineering

“The ECE students looked at the project in terms of circuit components. The mechanical engineering seniors considered the materials that are allowed in space, and the systems engineering students were looking at whether the mission meets all the requirements and goals.”

— Hina Fatima, a senior in the Department of Electrical and Computer Engineering

"It takes coordination to do a project this big. Testing is half the project, but it’s hard to believe it until you see it.”

— Matthew Herman, systems engineering senior

“The long-term goal is to engage senior design students in designing their own satellite and their own path to space.”

Peter Pachowicz, associate professor of electrical and computer engineering.

“We all had different ideas of how things should be laid out. Every time we have a meeting, we worked together and talked through our differences.”

— Brandon Goodrich, a senior in mechanical engineering

Mason Engineering students from three departments worked together on a senior design team to create three experiments that will be sent into the Earth's lower orbit on a small satellite, called a ThinSat. Pictured from left to right: Le Truong, Hina Fatima, Jeremiah Terrie, Alex Mourao, Brandon Goodrich, and Tameem Siddiquee.

Mason Engineering students took a giant leap into complex space-related research this year.

A senior design team with 14 students from three engineering departments worked together all year on three experiments that are being integrated into one small satellite about the size of two smartphones.

The satellite, called a ThinSat, is scheduled to take the science experiments into Earth’s lower orbit next spring on a rocket, whose main mission is to deliver cargo to NASA’s International Space Station. ThinSats piggyback on the cargo mission.

“The students from different disciplines cooperated to design, implement, and test the experiments and then integrated everything into an infrastructure that complies with NASA requirements,” says lead faculty advisor Peter Pachowicz, associate professor of electrical and computer engineering.

Students in the Department of Systems Engineering and Operations Research (SEOR) provided the parameters for the designs and helped test the projects after they were created, while seniors in Electrical and Computer Engineering (ECE) and Mechanical Engineering (ME) created the hardware and software for the experiments, which include:

A new thermal battery shield to protect a lithium polymer battery from freezing temperatures during an eclipse, designed by the mechanical engineering students.
A method to scan a range of ultra-high radio frequencies used by ham radio to see which are suitable for inexpensive, low-bandwidth satellite communications in the Washington, D.C.-area, a project from the ECE seniors.
A comparison of two solar-powered systems to find out which is more efficient, also from the ECE students.

The students got experience in real-world engineering, says Lance Sherry, an associate professor in systems engineering and operations research. “When we build aircraft or other complex systems, there is never enough time, space, or energy.”

One of the biggest things the students learned in this is how to allocate limited resources to come up with an optimum design given the constraints, he says.

After the ECE and ME seniors built the components of the experiments, they gave them to the system engineering group to integrate into the ThinSat to start testing.

One test included putting the ThinSat onto a vibration table, then shaking the table for a couple of hours to simulate what it’s going to be like when the launch takes place. “It’s a very rough ride,” Sherry says.

Another test put the batteries into an increasing vacuum until they popped. “Better to find out what the limits of the design are in the lab than after it’s launched,” says Lena Elhajj, a systems engineering senior.

Teamwork was essential because complex engineering projects are rarely undertaken outside a multi-disciplinary environment, says Robert Gallo, director of senior projects for mechanical engineering.

Alex Mourao, Brandon Goodrich, and Esteban Perez, members of a senior design team called Asteria, are working on a new thermal battery shield to protect a lithium polymer battery.

Brandon Goodrich, a senior in mechanical engineering who dubbed the team Asteria after a Greek goddess of the stars, says the experience taught him valuable lessons about working with people with diverse design perspectives. “We all had different ideas of how things should be laid out. Every time we have a meeting, we worked together and talked through our differences.”

Hina Fatima, an ECE senior, agrees. “The ECE students looked at the project in terms of circuit components. The mechanical engineering seniors considered the materials that are allowed in space, and the systems engineering students were looking at whether the mission meets all the requirements and goals.”

Everyone owned a piece of the project, which helped manage the workload, Elhajj says.

It takes coordination to do a project this big, adds Matthew Herman, a systems engineering senior. “Testing is half the project, but it’s hard to believe it until you see it.”

Virginia Space and Twiggs Space Lab, the projects’ sponsors, are testing Mason’s ThinSat in a high altitude balloon to make sure everything is launch ready.

Next year, the satellite and other ThinSats are scheduled to launch in a rocket from the Mid-Atlantic Regional Spaceport, Wallops Island, Virginia.

Juniors are waiting in the wings to take over the projects, as well as design other experiments for another ThinSat, Pachowicz says.

He has other aspirations for future engineering students. “The long-term goal is to engage senior design students in designing their own satellite and their own path to space.”

“Mason is uniquely positioned to provide students this incredible hands-on learning opportunity in one of the fastest growing engineering fields,” Sherry says.

Let the countdown begin.

The seniors on the team included:

Electrical and Computer Engineering: Hina Fatima (lead) Gabe Haddad, Reagan Gillette, Tameem Siddiquee, Jay Deorukhkar, Jeremiah Terrie, Le Truong.

Mechanical Engineering: Brandon Goodrich (lead), Alex Mourao, Esteban Perez.

Systems Engineering: Lena Elhajj (lead), Matthew Herman (lead), Michael Jordan, Raghad Alahmadi.

Climate Control Analytics Promote Sustainability

4429684e-ae8d-405e-870a-3b7aefe68162 (Martha Bushong) — Thu, 25 Aug 2016 18:41:25 +0000

Climate Control Analytics Promote Sustainability 4429684e-ae8d-… Thu, 08/25/2016 - 14:41

There’s a saying in Virginia, “If you don’t like the weather, wait a few minutes—it will change.”

Temperature fluctuations can cause climate control systems to work overtime, and we don’t always understand the effect on budgets until it’s time to pay the bill. But what if there was a system that monitored your heating and cooling system and provided information to help conserve energy and save money?

In spring 2016 Volgenau student Adam O’Connor, and his team decided to create such a system for their senior design project. They call it Climate Control Analytics (CCA).

“At its heart, CCA is a data acquisition system,” said O’Connor. “We are developing a sensor network to capture key data points in the HVAC system, its building, and the surrounding environment.”

It works like this. The sensor network feeds data to a central database system—the Sensor Output Database (SOD). The SOD functions as the central data hub (or the file cabinet) of the software system’s separate entities: a web dashboard user interface, a central control that coordinates all system processes, and the active control system.

If the SOD is the file cabinet, the web dashboard is the assistant that helps users generate HVAC system performance and consumption reports. The team designed the CCA to collect and store data for 10 years—the expected lifespan of HVAC equipment.

The active control system allows users to see how much it will cost to set the thermostat for any particular temperature set point. It does this by modeling the indoor temperature with a system of differential equations and using a sliding window multi-linear regression outdoor temperature model to predict daily outdoor temperature curves.

By using historical outdoor temperature data and HVAC system performance data, the CCA system will enable consumers to know how much it will cost to keep their home or business at a particular temperature, even in Virginia where it can be winter in the morning, and summer by lunchtime.

Signals and Communication

First-ever Mason satellite begins its mission

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In This Story

Read More About the Project

Join the Launch Party

Countdown to launch: Engineering students team up to reach the starry heights with a satellite

Climate Control Analytics Promote Sustainability