METHOD FOR DETERMINING THE SPEED OF A ROTOCRAFT RELATIVE TO THE SURROUNDING AIR

摘要

The invention relates to a method for determining the speed vector (I) relative to the surrounding air of a rotocraft (HL) equipped with a beam scanning Doppler laser anemometry device to measure (Step 1) a set of projections (Vm) of said speed vector (I) in at least four non-coplanar directions, comprising the following steps: - detecting (Step 2) any anomaly of at least one element from the set of measured projections (Vm), from a comparison relative to a first threshold (S1), of a deviation between the measurements (Vm) and the measurements anticipated (Vp) from a predetermined model depending on values of beam scanning parameters of the anemometry device; and - reducing (Step 3) the effect of a detected anomaly by invalidating measurements corresponding to said anomaly, and computing the components of the speed vector from valid measurements.