Release date: 01 Nov 2021
Revision: 1.0
During the flight, it is possible that a SLAM loss can occur. A SLAM loss means that the system is no
longer able to track its location in the environment using LiDAR. SLAM loss generally occurs as a result
of environmental factors, such as smoke, moving objects, flying over a body of water, flying over large
featureless areas, or flying too high above the ground. If triggered, the system will display a critical (red)
SLAM Loss alert in the Hovermap status bar, and an audio alert tone will sound.
If Hovermap loses its ability to hold position using SLAM, the navigation method will revert to the
selected secondary method. In outdoors flights, with GPS set as the secondary navigation method, this
will result in a stable, GPS-assisted hover. In GPS-denied environments, with HVM INS set as the
secondary navigation method, the drone will be placed in an emergency hover. You will have reduced
control authority in the second scenario, so you should maintain vigilance and correct any drift.
The system will automatically attempt to recover SLAM. Once SLAM-based control has been regained,
the system may move around for a few seconds, but control authority will return to normal. A critical
(red) Lost SLAM alert will show in the Hovermap status bar. It will remain there for the duration of the
flight.
Following a SLAM loss event, the SLAM navigation method is unreliable and could lead to unstable
flight. For this reason, a SLAM Unreliable warning will continue to be shown for the remainder of the
flight. The mission should be aborted. You should either bring the system home in Pilot Assist mode
(recommended), or guide it home using waypoints in the Waypoint UI. If neither of these methods is
viable, the return to home function may be used, but this should be avoided if possible.
Warning
If the secondary navigation method is set to HVM INS, you will have reduced
control authority when the SLAM Loss failsafe is triggered. In this state, the drone
may drift due to airflow or other external factors. Maintain vigilance and control
the drift to maintain the safety of the drone.
•
•
Warning
Once a SLAM Loss failsafe has occurred, Hovermap’s position estimate is no
longer reliable. In this case, you should use Pilot Assist mode to bring the
drone home safely.
After the SLAM Loss failsafe is triggered, the map in the Waypoint UI will
stop updating the point stream, and the position of the drone on the map
may be incorrect. Use Pilot Assist mode to bring the drone home safely.
To Next Page
Loading...