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The ocean鈥檚 massive and mercurial nature can make underwater exploration a challenging undertaking. Autonomous underwater vehicles (AUVs) provide innovative ways of collecting data and conducting survey missions in the ocean.

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A team of CU Boulder engineering students is designing and building AUVs听to create the next generation of underwater vehicles. The RoboSub Club at CU Boulder is a student-led organization whose听members gain professional development experience by designing and building AUVs. The organization is open to undergraduates and graduate students.

AUVs are unmanned, untethered, underwater vehicles that carry their own power source and rely on an on-board computer to execute a mission. The programmable robotic vehicles maneuver through the ocean without real-time control by human operators. AUVs can explore oceans and coastlines, map submerged wrecks and dangerous underwater obstructions, and examine bridges for infrastructure damage.听

鈥淭ypically, it takes years to really understand how everything works and to meaningfully be able to contribute,鈥� said Jeff Venicx, team lead. 鈥淎 lot of the systems we work on are things you wouldn鈥檛 learn until you鈥檙e in grad school, but we have the continuity of team members that are undergraduates and grad students to help teach these topics.鈥�

This is Venicx鈥檚 third year on the team. He has an undergraduate degree in electrical engineering from CU Boulder and is finishing his master鈥檚 degree in electrical engineering and will start working on his PhD in computer science at CU Boulder in the fall.

The CU team鈥檚 robosub听is 4 feet long, 1陆 feet听wide and weighs 70 pounds. Eight thrusters move the robosub through the water. As much of the vehicle as possible is custom-designed and custom-made in the club鈥檚 lab at the College of Engineering and Applied Science. For example, a 120-pound block of aluminum they received from Ball Aerospace was milled down and used to construct a 9-pound center hull.听

The robosub navigates using a Doppler velocity log听navigation system to measure the velocity in several directions, because GPS doesn鈥檛 function underwater.听The CU team puts its robosub through its paces in CU鈥檚 Recreation Center dive well.

Applying classroom knowledge to real problems helps students become highly proficient engineers. One way they can do this is to compete at the听2018听International RoboSub Competition being held at the SPAWAR naval facility in San Diego, California. More than 50 student-led teams design and build autonomous robotic submarines that must complete a challenging set of visual- and acoustic-based tasks. The tasks simulate the work required of robotic subs in many areas of underwater activity. Each team has 30 minutes to complete as many challenges as possible, which include maneuvering through underwater gates and picking up and moving objects. Teams are also required to write a technical paper, make a presentation to a panel of judges, create a short video and develop a website that documents their progress.

The competition is sponsored by the Office of Naval Research, Siemens Electronics, Northrup Grumman Corp., SpaceX and others.

鈥淭he course isn鈥檛 designed to be completed,鈥� Venicx said. 鈥淲e spend a lot of our time (at the competition) is strategizing which obstacles are most likely to get us the most points.鈥�

There are a number of benefits for competing in the RoboSub Competition. Team members connect with industry leaders and interact with engineers from all over the world. Competing raises the profile of the university on the world engineering stage.

The RoboSub Club is an example of the hands-on focus of CU Boulder鈥檚 engineering entrepreneurial spirit. The club draws students from a variety of engineering areas: computer science, electrical and mechanical.

They recently have begun working with the Cooperative Human-Robot Intelligence Lab at CU Boulder to apply various machine learning techniques to the sub that have only been tested in simulation. They鈥檙e working to allow the sub to inform a human operator about the likelihood of completing a task, and to overcome problems such as damaged or obscured senors.

鈥淭he engineering field is extremely competitive now,鈥� Venicx said. 鈥淵ou really have to do something extra to stand out. Showing recruiters what you鈥檙e passionate about makes a big difference in who gets hired. Going to the RoboSub Competition and having that at the top of your r茅sum茅, you immediately go to the top of the pile. It鈥檚 a great opportunity for us.鈥�

To help support the students鈥� crowdfunding efforts to send as many team members as possible to the听2018听International RoboSub Competition听in San Diego, go to the RoboSub Club鈥檚 crowdfunding page.听