I am using LIDAR to measure a robot's altitude. The robot's orientation relative to the ground is dynamic; i.e. the XY plane tilts relative to the Z axis. I would like the LIDAR to remain pointed close to perfectly downward as the robot tilts.
Some details: the tilts can be large, up to 30 degrees, but are short lived; the robot largely corrects its orientation within a few seconds.
Note, I have considered measuring the robots angle to trigonometrically derive altitude. I have also considered barometric pressure altimeters, but those do not have the reaction time I need.
Apologies if anything here was unclear, thank you.