diff --git a/src/modules/land_detector/MulticopterLandDetector.cpp b/src/modules/land_detector/MulticopterLandDetector.cpp index a0d66d2be5..fe1acef979 100644 --- a/src/modules/land_detector/MulticopterLandDetector.cpp +++ b/src/modules/land_detector/MulticopterLandDetector.cpp @@ -38,18 +38,18 @@ * *State 1 (=ground_contact): *ground_contact is detected once the vehicle is not moving along the NED-z direction and has - *a thrust value below 0.3 of the thrust_range (thrust_max - thrust_min). The condition has to be true + *a thrust value below 0.3 of the thrust_range (thrust_hover - thrust_min). The condition has to be true *for GROUND_CONTACT_TRIGGER_TIME_US in order to detect ground_contact * *State 2 (=maybe_landed): *maybe_landed can only occur if the internal ground_contact hysteresis state is true. maybe_landed criteria requires to have no motion in x and y, - *no rotation and a thrust below 0.1 of the thrust_range (thrust_max - thrust_min). In addition, the mc_pos_control turns off the thrust_sp in - *body frame along x and y. The criteria for maybe_landed needs to be true for MAYBE_LAND_DETECTOR_TRIGGER_TIME_US. + *no rotation and a thrust below 0.1 of the thrust_range (thrust_hover - thrust_min). In addition, the mc_pos_control turns off the thrust_sp in + *body frame along x and y which helps to detect maybe_landed. The criteria for maybe_landed needs to be true for MAYBE_LAND_DETECTOR_TRIGGER_TIME_US. * *State 3 (=landed) *landed can only be detected if maybe_landed is true for LAND_DETECTOR_TRIGGER_TIME_US. No farther criteria is tested, but the mc_pos_control goes into - *idle (thrust_sp = 0). By doing this the thrust_criteria of State 2 will always be met, however the remaining criteria of no rotation and no motion still - *has to be valid. + *idle (thrust_sp = 0) which helps to detect landed. By doing this the thrust-criteria of State 2 will always be met, however the remaining criteria of no rotation and no motion still + *have to be valid. *It is to note that if one criteria is not met, then vehicle exits the state directly without blocking. *