The Drones of Moratuwa

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The University of Moratuwa’s maiden UAV Ravan The University of Moratuwa’s maiden UAV Ravan

Drones play a pretty important role in the world we see today – although few of us have ever actually seen one in the flesh, almost everyone on the Internet knows they exist But what’s Sri Lanka been doing in this field?

To answer that question, we decided to talk to Professor Rohan Munasinghe of the Department of Electronic and Telecommunication Engineering in the Faculty of Engineering of – pauses for breath – the University of Moratuwa.  Professor Rohan Munasinghe has mostly been a person we’ve seen at conferences and events, giving incredibly detailed speeches about robotics. He works from an office plastered with diagrams, surrounded by model robots. “Robots are the future,” he stated flatly, once the small talk was done with. Unlike most people who see robots primarily as a means of automating certain tasks, he sees them as something you can develop, sell to foreign markets – he’s quite adamant on this – and drive the economy with.

So…meet RAVAN
RAVAN is a UAV – an Unmanned Aerial Vehicle. It weights 7.8kg and has a flight ceiling of approximately 300 meters. It was first flight tested for aerodynamic stability on the 2ndof February 2014, and then autopiloted on the 6th of July 2014. Thus far, RAVAN has undergone more than sixty flight tests without a single crash incident. Testing a UAV is no easy task – different speeds, altitudes, turn angles and many more variables have to be configured and fine-tuned in order to achieve the perfect flight. They’re been working on Ravan for two years now, and this drone has achieved a stable flight.

It all started back in 2007, when the University of Moratuwa first introduced Robotics as a subject to the Engineering syllabus. The initial start was slow, taking a few years to establish. But eventually, laboratories were built and the necessary equipment was put into place – the faculty even credits itself for hosting the first ever robotics competition in Sri Lanka among undergraduates.

Everybody expected it to flop, but to the faculty’s surprise, students liked it. For once they had a shot at breaking out of the traditional structure. Eventually, the program became one of the most popular in the University: it’s a grind that takes a high level of commitment to get through.

The next milestone was to introduce the concept of aerial robots to the syllabus – a wholly different ball game. The faculty carried out a series of small experiments to test the feasibility of adding the concept to the program, and by 2010, the Professor was confident that UAVs could be designed and developed in Sri Lanka. Support from the University and the rest of the faculty kicked in.

Aerial vehicles, he explains, were a whole different ball game. There were added risks – for example, if a drone crashes, the student fails. It would be much easier for a student just to follow the regular track.  In order to compensate for any failures, the faculty had to minimize risk of something going wrong with the students projects – initial models could be repaired easily and be up and running within 30 minutes. After all, risks are not something the University can afford: they have limited funding. If something goes wrong, it essentially means a setback of at least 3 to 4 months of work. Meticulous care has to be taken before any kind of flight.

And then came CeyHawk
Eventually, Professor Munasinghe and his students in the faculty felt that they had reached a level where they could realistically build something that a hardcore hobbyist would like – more importantly, something that might make it in a global market.
The result was CeyHawk: a drone that is slightly smaller than RAVAN, better looking, with the fuselage shaped like a fish and the wings having a slight curvature to them – for aerodynamic stability, the Professor explained. Missing the camera, I asked him for more details on the production process. The explanation sounds easy: a 3D model is first created using applications such as Solidworks, then a cross section of each component is taken, and the components are laser-cut: from there, the auto pilot control system, video/data links and so on are all hardwired into the UAV. The exact process here is a bit more detailed, but that’s the gist of it.

CeyHawk was launched in December 2014, alongside with the inaugural opening of the UAV research lab in the faculty. This was the first laboratory dedicated to UAVs and drones, a first in the history of universities in Sri Lanka. Professor Munasinghe mentioned Professor A.K.W. Jayawardane, the Vice Chanceller, and Prof. U.G.A. Puswewala, the Dean of Faculty of Engineering, whose support was critical in making all of this happen. Then, after permission from the Civil Aviation Authority, SLAF and Sri Lanka Police, they were good to go.

The maiden flight of CeyHawk was done on the 8th of February. Most newly developed UAVs crash on the first flight; CeyHawk didn’t.

Now, says the Professor, they’ve got to a stage where the work they do supersedes a graduate level project and goes into post graduate territory. Perhaps now they can start chipping away at that hobbyist market.

Through earth, sky and water
We went there for drones, but apparently that’s not all this faculty is doing. The yellow thing in the photo is an unmanned submarine of sorts. It’s around 3 feet long and is currently undergoing testing in the Bolgoda Lake, and apparently began with a post graduate student, and was and then passed down to a set of final year students.

The Professor is most concerned with industrial robotics, a topic more at home in Japan than in Sri Lanka. The faculty aims, he says, to teach those interested so that in the future, there will be engineers in Sri Lanka who possess the knowledge and skill required to utilize industrial robots.

Right now, the University is the main funding force behind all of this: the Mine Detector has received some funding from the Government of Sri Lanka and the NERD (National Engineering and Research) Center, and the rest is mostly on University payroll. For now, Professor Munasinghe and his students are obsessed with perfecting the underwater robot, and putting CeyHawk into the global market. Let’s hope they can keep up the good work.

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