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areus project

Daimler develops ways for industrial robots and factories to save energy under Areus project

December 15, 2016 by Sam Francis

Saving energy has been a serious preoccupation of many industrial companies for many years, but especially in recent years with prices of fuel fluctuating and public concern about the environment growing. 

In the auto manufacturing sector, which buys the most number of industrial robots and uses vast amounts of energy, companies such as Kuka have been looking to make their automation systems more energy efficient.

Now, in the European Union, a project called Automation and Robotics for European Sustainable Manufacturing, or Areus, says it has developed the components of an energy-efficient automobile production system of the future. 

areus project

Areus’ idea is to have a direct-current network supply robots with “green” electricity, some of which is subsequently recovered and temporarily stored.

Digital measurement technology and intelligent networking will ensure that the industrial smart grid operates flexibly and reliably.

Daimler is a partner in Areus and has seconded engineers and resources to the research work, which is overseen by Davis Meike, manager of the Areus project at Daimler.

Power hungry 

The automotive industry uses more robots than any other sector. The computer-controlled machines are taking on more and increasingly complex tasks. They work reliably, efficiently, and with high precision. Engineers are now even teaching them how to learn. But how energy-efficient are these mechanical helpers in reality?

A robot isn’t necessary an energy hog. Even a robot that weighs a ton and moves components weighing hundreds of kilograms consumes only 2.5 kilowatts to do its job in active operation – the same as three standard toasters. But that’s the average value.

The actual energy consumption depends largely on how a robot is used and for what purpose. For example, robots account for a large share of the energy consumed in car body construction. That’s why the engineers at Daimler are looking for ways to further reduce the energy needs of robotic systems.

Meike says: “We began to focus more on this issue six years ago. Many components have been improved since then, and as a result the new generation of robots is now about 30 percent more efficient than the previous one.

“If we want to achieve further improvements, we will have to do more than just optimize individual components. We now have to take the entire system into account, including the changing energy environment.”

Smart grids for countries and factories

The transition to renewable energies is picking up steam worldwide. For example, countries like China are making huge investments in wind and solar energy.

Germany, meanwhile, is creating a scenario in which numerous distributed producers will supply the country with renewable energy. The purchasers of this energy will no longer just be consumers; they will be producers as well, due to the solar panels on their roofs, for example.

They can store the energy they don’t need themselves in household battery banks, for example, or in their electric cars.

Digital measurement technology and intelligent networking will ensure that the smart grid, as this concept is called, operates flexibly and reliably.

Meike and his colleagues at the process development unit are convinced that such a smart energy supply system can also be used for vehicle production. Their vision is to create a smart industrial micro-grid.

However, this cannot be achieved without a thorough system change. What the engineers are planning sounds like the completion of the energy transition and the digitization of production at the same time.

Although achieving these three objectives will already require a lot of work, Meike and his colleagues have even more goals in sight. Specifically, they want to switch the energy supply of industrial robots from alternating current, which is usually employed today, to direct current.

Meike says: “All of the electricity consumers at our plants use direct current – that’s the case with everything from the computers to the drive control systems for the individual electric motors that move the robot arms.

“However, the power sockets supply alternating current, which we first have to convert. This causes unnecessary losses.”

A direct-current grid would be much more efficient, explains Meike. It would also have the advantage of being more robust against fluctuations in the power supply and in the grid quality – a common occurrence in renewable energy supply systems.

All of these projects combined add up to a program that will likely change the energy supply structure of automobile production as thoroughly as the switch from the classic combustion engine to the intelligently controlled electric drive will change the vehicles themselves.

Areus revs up 

Daimler has built a test cell in Sindelfingen, Germany, to research the Areus project ideas. The test cell is a complete production facility that uses direct current. And it is supplied with solar power from its own photovoltaic system.

The Daimler engineers realized that they needed expert partners from the scientific and business communities in order to achieve such a far-reaching goal. These partners were quickly found and the EU provided funding.

The resulting EU project Areus was launched in mid-2013.

Experts from four European universities and eight companies spent the next three years cooperating on the project in order to develop innovative technologies, tools, and algorithms for the sustainable robot technology of the future.

The teams’ tasks were defined by four work packages. The results of this work were immediately tested at Daimler in Sindelfingen. At this plant, the company set up the first prototype of a completely new kind of robot cell, the “Demo Cell”, which the Areus experts used to test the concepts and technologies they had developed.

In this cell, four robots operate on a square area measuring nine meters on a side. Together, they create an entire production facility composed of direct-current systems.

The cell is supplied with solar power from a photovoltaic system that was specifically installed for this project, and it can store surplus energy. In addition, the cell is connected to the external alternating-current grid. The cell works, and the robots are already producing components.

Meike says: “We want to show here that direct-current technology actually works and make it measurable.

“However, we also want to find out where there are still problems. Because nobody has constructed such a facility before, such problems have never been measured or technologically resolved.”

As well as Daimler, a number of other companies and organisations are involved in the Areus project, including Kuka, Siemens, EngRoTec, Delfoi, and DTU.

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Filed Under: Features, Industrial robots, Industry, Manufacturing, News Tagged With: areus, cell, components, current, daimler, energy, engineers, grid, industrial, power, production, project, robot, robots, smart, systems, work

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