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The robust, energy-efficient climbing robots "SpaceClimber" was designed for missions in difficult terrain. An essential component of his musculoskeletal system are the intelligent, powerful joints. Especially for such a joint has Mayr Antriebstechnik a mini-Bremse develops. Equally impressive are its small size and increased the energy efficiency of the robot. At the German Research Center for Artificial Intelligence (DFKI) this robot system is now being developed.
The Space Climber in action
In future, he will be able to independently explore planets and build up an infrastructure there with his gripping arms. We're talking about the new multi-unit walking robot that scientists at the Robotics Innovation Center are currently developing at DFKI. The robot, which resembles a praying mantis, is being developed as part of the "Limes" project, which will run 2016 until the end of April and will be funded by the German Aerospace Center (DLR). Thanks to his morphology and different running patterns for different soil conditions, he will master craters and boulders and manipulate them with his forelegs. By learning from his experiences, he should be able to act purposefully. With its locations in Kaiserslautern, Saarbrücken, Bremen and Berlin, the DFKI is the world's largest research center in the field of artificial intelligence.
Model ant with six legsAn already proven space robot of the DFKI and with a forerunner of the project Limes is the climbing robot Space Climber. In its morphology it resembles its natural model, the ant. The free-climbing robot has six legs that help him, for example, in exploring crater walls, crevices or ravines. In its basic attitude, the robot is around 80 cm wide, 1 m long and 20 cm high. Its weight is about 25 kg. The Space Climber dominates steep, non-uniform slopes with gradients up to 80% safe and moves at a speed of 0,3 m / s. Among the most important components for his great mobility are the drives for the musculoskeletal system. Therefore, intelligent, lightweight and powerful joints with a focus on energy efficiency have been developed.
Save energy with a secure holdA joint also sits in the upper body of the robot: If the Space Climber runs into a sloping wall like a crater, the upper body can thus adapt to the environment and upright or fold down at the edge of the crater. In addition, the upper body, for example, also straightened up to have the front legs free for manipulation. In this joint is an extremely compact "Roba-stop safety brake which the drive specialist has specially developed for this application.
If the Space Climber runs horizontally in a straight plane, the brake will hold the joint reliably in position and prevent the rotation of the input and output when the engine is switched off. "With this brake, the joint does not need to be permanently energized to hold the position. That saves energy, "explains DFKI project manager Dr.-Ing. Sebastian Bartsch. The brake has a holding torque of 0,28 Nm and only weighs 40,5 g with an outside diameter of 120 mm. "For us, the small dimensions of the brake were decisive," says Dr.-Ing. Bartsch. "Because we had only a very limited space available, in which the brake should be accommodated, without changing the construction or to increase the weight significantly." The spring-applied brakes work on the fail-safe principle, so they are in energy-free state closed. The brakes generate the braking force by means of compression springs. After switching off the power or in case of power failure, they ensure a reliable and secure hold of the devices in every position.
Robot lady with memory
First results of the project Aila
Also in the robot system "Aila", a mobile, autonomous system with two arms, the mini-brake was already used. "At Aila, the brake was in the elbow joint," explains the project manager. "When the robot picks up something, it needs to be permanently energized to hold the arm and the object up. The brakes can be used to switch off the engine and save energy. "The robot lady can sort and handle heterogeneous items that differ greatly in shape and characteristics, such as different items from the supermarket. With the help of the object information stored in the digital memory, she adapts her gripping and transport behavior to the specific characteristics of the objects.
Proven millions of times in the fieldFor over 40 years, the Allgäu drive specialists have developed and manufactured spring-actuated safety brakes and are the world leader in brakes for passenger lifts, stage equipment and vertical axes. Even with customer-specific requirements, the company has the expertise to provide tailor-made and cost-effective solutions, such as: B. for medical technology or robot applications to develop. Their safety brakes have already proven their high reliability millions of times in the field. Proven design principles and permanent checks on calibrated test rigs ensure consistently high quality.