Utvärdering av bromskraft hos räddningsdrönare med mål att vertikallanda
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Examensarbete på grundnivå
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Modellbyggare
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Sammanfattning
This project is provided by the Swedish Sea Rescue Society (SSRS) and focuses on
investigating the possibilities for their current sea rescue drone to extract reverse
thrust from its current components with the goal of achieving a vertical landing.
During recent years the SSRS has hired several groups and universities in order to
develop their ongoing drone project. The goal with their drones is to fly them out to
incident areas at sea in order to record, broadcast and collect information of the
situation in order to then forward it to the sea rescue personnel so that they can be
better prepared for the incident at hand before they arrive.
Under current conditions the drone is expected to fly out to the incident area,
circulate the area until it is let go to drift away until it naturally lands somewhere at
sea where it is later collected. The current version of the drone is entirely optimized
around maximized glide-functionality and is thereby very light with only a singular
propeller mounted in the back of the drone. This means that the distance the drone
travels before it naturally lands in water can be quite far away which means it can
both be difficult to find and to collect. Therefore it would be much more convenient if
the drone could instead be vertically landed onto one of the sea rescue vehicles
instead.
The investigations and wind tunnel tests that have been done in this project shows
that the current combination of components in the drone do not allow for enough
reverse thrust to be able to vertically land the drone safely. For the drone to be able
to carry its own weight under static circumstances the drone would need to reach a
reverse thrust equal to roughly 10 newton while the maximum achievable reverse
thrust reached in this project only reached upwards of 7 newton. These 7 newton
were also achieved under unusually high electrical currents for the drone.
The project evaluates many different cases and flight situations relative electrical
currents and presents the resulting data as well as discusses potential solutions and
further potential projects which could possibly lead to the eventual goal of vertically
landing the drone.