The research team has already tested several prototypes of the autonomous mining robot using compact Archimedes screws. They recently published a paper in IEEE Access in which they describe a mobile platform with four independently controlled propellers. This mechanism could be useful not only in underground exploration but also in moving across various types of surfaces.
The scientists began their work with computer modelling, creating a CAD model and testing it on different types of terrain. Although Archimedes screws are not always the most effective propulsion system on some surfaces, they can act on most soil types, albeit with some limitations.
Complex kinematic models made it possible to synchronize the operation of the four propellers so that they could move in the desired direction. A sensor network was developed to control the robot’s orientation, including positioning systems and sensors on the rotors that prevent overloading.
Prototype tests showed that the system worked well in snow, sand, frozen ground and mud, but was not yet ideal for rough and sloped surfaces. Within the ROBOMINERS project, which aims to create autonomous mining robots, scientists plan to complete the creation of the final prototype and possibly adapt it for use on the Moon or Mars.
Source: Ferra
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