Researchers at Delft University of Technology (TU Delft) are developing unmanned robotic ships that will change today’s shipping industry, Joinfo.com reports with reference to RoboHub.
“Imagine what will happen if you save cost and time on one of the biggest sectors in the world”, says Vittorio Garofano of the faculty of Mechanical, Maritime and Materials Engineering (3mE) at Delft University of Technology.
The benefits are clear: cost reduction, reduced emissions, increased safety and increased cargo capacity.
Besides, people won’t lose their jobs over this development, as by 2025 a shortage of approximately 150,000 maritime officers is expected.
But there are a lot of challenges that must be met before the captain can leave the bridge and the algorithms take control. For example, which technologies are needed so that autonomous ships can function hundreds of kilometres from shore? How can robotic ships be made as safe as conventional ships? How should they interact with each other and how do you make sure that the power and propulsion systems work properly when nobody’s on board?
These are some of the key challenges that the research of Delft University of Technology focusses on. Several algorithms have been developed to ensure a safe and robust operation, explained PhD student Ali Haseltalab during a colloquium on autonomous vessels last week.
“With an adaptive control algorithm, which learns the dynamics of the propeller, you can control the ship perfectly”, Haseltalab told.
This mathematics is put to the test at a 3mE-laboratory, which consists of two giant water tanks with QR-codes on the sides. To study the dynamical behaviour of autonomous vessels, researchers built 3 prototypes: The Grey Seabax, the Amphibian and the Delfa-1. The Grey Seabax is a remote-controlled vessel or RCV – the first essential step towards a fully autonomous ship.
One of the things Garofano and his colleagues are working on is a robust communication infrastructure. The Grey Seabax recognises QR-codes and will be able to respond accordingly. These binary markers can be used for several purposes: they could represent a waypoint, a traffic redirection signal or a building ashore.
The computer lies at the heart of robotic ships. To enhance safety, it is important that the central computer hands over as much as control to intelligent sensors and actuators. With the Amphibian and Delfia-1, research is being done on the shift from centralised to distributed control.
“If something fails, the system continues”, Garofano says. “That increases the survivability.”
With the Amphibian being a hovercraft, new transportation routes can be explored. But the vessel is still very difficult to control, tells Garofano.
“GPS offers an accuracy of metres, but we need millimetres.”
The first robotic ships will be used for surveillance, maritime litter collection, patrolling and inspection, says associate professor Rudy Negenborn.
“They can be used for monitoring water quality, to make sure that nobody can dump chemicals into the ocean unnoticed.”
Negenborn thinks that the big container shipping corporations will be the last to switch to robotic ships. They will first appear on the rivers.
Rolls Royce predicts that it will test a fully autonomous, unmanned ocean-going ship by 2035.
All researchers agree that, in the end, safety will be one of the biggest advantages of robotic ships. Nowadays, at least 70 percent of all incidents at sea are caused by human error. Autonomous shipping will lead to a drastic reduction of the number of incidents and casualties.
“Robots will ensure consistency of operations”, explains Haseltalab. “Autonomous systems will always be there. They don’t get tired.”