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Posted: Jul 26, 2013

Flying robot with adaptive morphology for multi-modal locomotions (w/video)

(Nanowerk News) Researchers at EPFL's Laboratory of Intelligent Systems are developing a novel flying platform which has the ability to move on the ground by using its wings only.
Using the wings as whegs to move on rough terrains instead of adding an additional structure to the robot allows to minimize its structural mass. Therefore, this design minimizes the total weight of the platform, and thus minimizes the impact on the flight performance of the robot. The morphology of the robot is optimized for ground speed. It can move forward at 0.2 m/s (0.7 BL/s), and can rotate on spot at 25°/s. The robot is capable of walking with different gaits, it can move on different surfaces, it can overcome high obstacles, and can also navigate in rough terrains.
This project aims at designing robots for applications such as exploration, search-and-rescue, or monitoring of the environment; where robots have to deal with very complex terrains, such as semi-collapsed buildings, deep caverns, or forests with a lot of vegetation. Autonomous robots are appealing for these tasks due to their ability to explore areas that are risky and inaccessible to humans.
However, most existing mobile robots use only one single locomotion strategy, such as rolling, walking, flying, hovering, climbing, swimming, crawling, or jumping. Using only one locomotion strategy limits their flexibility and adaptability to different environments. In a search-and-rescue scenario there is a need to fly quickly over extended areas, thereby the use of a winged robot is interesting. However, careful exploration in confined environments or near the ground is challenging for flying robots and terrestrial locomotion is more energy efficient over short distances. For these reasons, a robot capable of ground locomotion and of flying-hovering locomotion is well suited to navigate in complex environments.
In this project the team proposes to use a new approach, which we call ”Adaptive Morphology”, where parts of the structure of a robot are shared between the different modes of locomotion, instead of simply adding a second locomotion structure to an existing robot. Moreover, the structure could self-adjust its shape to adapt to the locomotion mode and the efficiency of locomotion in each mode of locomotion can be improved through adaptive morphology suitable for that mode. We aim to make adaptive deployable wings for improving the mobility of a flying robot; their shape could be adaptively modified to augment efficiency of forward flight, hover flight, and displacement on the ground. For example, wings could be fully deployed for flying outdoors and reduced for hover flight and ground modes.
Source: Technische Universität München
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