At 11:05 am the robot „Athena“ has arrived with a Lufthansa plane (LH 457) at Frankfurt Airport. During the flight, Athena was seated as an official passenger in economy class. Accompanied by scientists from the Max Planck Institute for Intelligent Systems (MPI IS), Athena has traveled from Los Angeles to Tübingen in order to acquire many new skills: standing, balancing, walking - and beyond that many meaningful activities, which she can use to assist people in daily life.
The Fukushima disaster has demonstrated how far away robotics research still is from creating useful systems for our daily life. There remains a lack of understanding of autonomous systems that can reliably perform useful activities, like opening doors, closing valves or operating a pump, – such tasks were important in Fukushima.
Worldwide, researchers and engineers are working on the development of novel robots that can act rationally and independently depending on the situation - as in destroyed power plant buildings or in earthquake zones. This is a formidable task.
Flying Athena home
This brings Athena into play. The humanoid robot, measuring 1,88 m in height and weighing only 48kg, stands on two legs with feet. Together with his team, Stefan Schaal, director of the "Autonomous Motion" department at the MPI for Intelligent Systems in Tübingen, has formulated ideas and specifications, which guided the development by the US robotics company Sarcos.
Athena’s development at Sarcos was initiated by a US funding program for Robotics in Disaster Response (DARPA Robotics Challenge), in collaboration with the Californian partner laboratory of Professor Schaal at the University of Southern California, where he helds a professorship for Computer Science, Neuroscience, & Biomedical Engineering.
While the DARPA program focuses largely on teleoperated robots, the aim of the Max Planck Institute’s research goes far beyond: it would like to achieve truly autonomous robots, or even ones that are able to learn themselves.
Athena was designed as a humanoid (human-like) robot in order to be able to work with tools for humans in man-built environments. Unlike four-legged or wheeled creatures, bipeds have the advantage that they can pass more easily through narrow passages, can perform activities that are on the floor or high up (e.g., shift levers or fix a light bulb), climb ladders, or even operate a car. Of course, research is just beginning to bring robots to such domains.
On December 16, 2014, at 11:05 am, Athena has arrived in Frankfurt with a Boeing 747-8 (Lufthansa flight LH 457). Accompanied by scientists Dr. Jeannette Bohg and Alexander Herzog, she has spent the flight almost like a normal passenger in the cabin. But of course she has neither eaten, drunk nor visited the restroom. Athena traveled completely passive, i.e. without any energy source. Her travel companions have brought her to the plane in a wheelchair. In the same way the robot leaves the plane in Frankfurt and enters into a minibus, riding "home" - to the department of "Autonomous Motion" at the MPI for Intelligent Systems in Tübingen. There, the scientists will teach her walking over uneven terrain as one of the first skills in the coming months.
A new humanoid robot - rather a helper for disasters than a nurse
The robot is full of technical finesse. Its head is equipped with sensors enabling to detect its environment. A stereo camera system works quite similar to our eyes. From two images it calculates three-dimensional depth images. Thus Athena can determine, for example, the position of objects to grasp in the vicinity. Responsible for long range vision is a Velodyne laser scanner, which resembles a small lighthouse on the head. This sensor sends out 32 fan-like laser beams and, from the reflected light, it calculates the distance from surfaces. With a range of 80 m, the laser scanner rotates 10 times per second around the vertical axis and thus scans the entire environment around the robot.
In Tübingen, Athena will get an inertial sensor for balance control mounted on the upper body — similar sensors are in the human inner ear. It will detect the orientation of the robot and its accelerations, which are important to understand what is up or down, i.e., the direction of gravity. Athena still has to wait a few more weeks for her real arms, because they are still in production. Currently she is wearing prototype plastic arms that were printed with a 3D printer in Tübingen. These arms can be moved by hand only and have no sensors, but they allow researchers to evaluate the design.
Athena's legs are very agile. Her hip and knee joints move hydraulically, with oil at high pressure (200 bar). Sensors at all joints measure the position and torques of each joint and transmit the data to the software, which in turn controls the movement of the joints by hydraulic valves. Athena stands on foot prostheses developed by Otto Bock for humans. The carbon fiber material of the prosthesis allows a suitable spring behavior for running on two legs, and it makes the legs very light. Athena is the first humanoid robot to use such prosthetic feet.
The movement of the joints under its own weight takes the most energy. A large laboratory pump generates a high-pressure oil flow that is directed with hoses to the robot to move the joints. That means, the robot is energetically not autonomous, and currently needs an external hydraulic supply. In the future, this will be directly integrated into Athena. In contrast, the electronics and the sensors need relatively little energy, which is provided by an external electric power supply.
Athena is a machine - and it looks like one. It is not the prototype assistive robot that will help in the hospital or will support the elderly in coping with their everyday lives.
Stefan Schaal explains: "Athena is the robot who saves people from the collapsed house or that is sent into the woods to look for the six-year-old Thomas, who has lost his way. Athena is intended for physical work in complicated terrain, which is possibly inaccessible or too dangerous for humans.“
Athena has a lot to learn
The robot is brand new and, so far, it can only perform rudimentary movements. It will take a few more months until it will be able to autonomously walk and balance. Mid-term objective of the Tübingen scientists is to run the robot over rough terrain or obstacles.
Longer-term goals include, among other things, whole body coordination to grasp and manipulate objects, or to move through tight spaces. For these tasks, Athena must be able to maintain balance, to stretch and reach for something, or possibly to independently get up again after falling over. A prerequisite for this is the correct perception of the environment.
To achieve these goals, researchers have to invest a lot of time in basic research and development. The fundamental principles that lie behind the human ability to perform these seemingly simple tasks are still largely unknown today.
"It is important that in the future the robot can safely move even in difficult terrain," says Stefan Schaal. "Our research is specifically concerned with autonomous perception, control and learning in such futuristic systems. We hope that one day the robot can really help in complex outdoor tasks, for example, in an emergency, in space, for assistance during epidemics, or other situations, like fire, people search, weather catastrophes, etc. – i. e., pretty much anything where systems on wheels can not be used. Of course, these are all visions for the future, and to achieve that, we have a lot of research ahead of us."
The Max Planck Institute for Intelligent Systems is grateful for the support provided by Deutsche Lufthansa AG, including help from the employees in both Los Angeles, CA, USA and in Frankfurt, Germany.
The Max Planck Institute for Intelligent Systems, Germany
Our goal is to understand the principles of Perception, Action and Learning in autonomous systems that successfully interact with complex environments and to use this understanding to design future systems.
The Institute studies these principles in biological, computational, hybrid, and material systems ranging from nano to macro scales.We take a highly interdisciplinary approach that combines mathematics, computation, material science, and biology.
The MPI for Intelligent Systems has campuses in Stuttgart and Tübingen. The Tübingen campus focuses on how intelligent systems process information to perceive, act and learn. Our Stuttgart campus has world-leading expertise in small-scale intelligent systems that leverage novel material science and biology.
The Tübingen Campus for Intelligent Systems consists of the following departments:
Autonomous Motion (Stefan Schaal): http://www-amd.is.tuebingen.mpg.de
Empirical Inference (Bernhard Schölkopf): http://ei.is.tuebingen.mpg.de
Perceiving Systems (Michael J. Black): http://ps.is.tuebingen.mpg.de
Claudia Däfler | Max-Planck-Institut für Intelligente Systeme
UT professor develops algorithm to improve online mapping of disaster areas
29.11.2016 | University of Tennessee at Knoxville
New standard helps optical trackers follow moving objects precisely
23.11.2016 | National Institute of Standards and Technology (NIST)
A multi-institutional research collaboration has created a novel approach for fabricating three-dimensional micro-optics through the shape-defined formation of porous silicon (PSi), with broad impacts in integrated optoelectronics, imaging, and photovoltaics.
Working with colleagues at Stanford and The Dow Chemical Company, researchers at the University of Illinois at Urbana-Champaign fabricated 3-D birefringent...
In experiments with magnetic atoms conducted at extremely low temperatures, scientists have demonstrated a unique phase of matter: The atoms form a new type of quantum liquid or quantum droplet state. These so called quantum droplets may preserve their form in absence of external confinement because of quantum effects. The joint team of experimental physicists from Innsbruck and theoretical physicists from Hannover report on their findings in the journal Physical Review X.
“Our Quantum droplets are in the gas phase but they still drop like a rock,” explains experimental physicist Francesca Ferlaino when talking about the...
The Max Planck Institute for Physics (MPP) is opening up a new research field. A workshop from November 21 - 22, 2016 will mark the start of activities for an innovative axion experiment. Axions are still only purely hypothetical particles. Their detection could solve two fundamental problems in particle physics: What dark matter consists of and why it has not yet been possible to directly observe a CP violation for the strong interaction.
The “MADMAX” project is the MPP’s commitment to axion research. Axions are so far only a theoretical prediction and are difficult to detect: on the one hand,...
Broadband rotational spectroscopy unravels structural reshaping of isolated molecules in the gas phase to accommodate water
In two recent publications in the Journal of Chemical Physics and in the Journal of Physical Chemistry Letters, researchers around Melanie Schnell from the Max...
The efficiency of power electronic systems is not solely dependent on electrical efficiency but also on weight, for example, in mobile systems. When the weight of relevant components and devices in airplanes, for instance, is reduced, fuel savings can be achieved and correspondingly greenhouse gas emissions decreased. New materials and components based on gallium nitride (GaN) can help to reduce weight and increase the efficiency. With these new materials, power electronic switches can be operated at higher switching frequency, resulting in higher power density and lower material costs.
Researchers at the Fraunhofer Institute for Solar Energy Systems ISE together with partners have investigated how these materials can be used to make power...
16.11.2016 | Event News
01.11.2016 | Event News
14.10.2016 | Event News
02.12.2016 | Medical Engineering
02.12.2016 | Agricultural and Forestry Science
02.12.2016 | Physics and Astronomy