Patent ID: 6198991
Filing Date: 2001-03-06
Classification: G05D,G08G

Abstract:
A low-noise level landing apparatus for helicopters, provided on a helicopter, comprising:data receiving means for receiving noise data measured on a ground by data communication;helicopter position calculating means for calculating a position of the helicopter;landing route setting means for setting a landing route;air data measuring means for measuring an airspeed and a descending speed;rotor rotational speed measuring means for measuring a rotor rotational speed;helicopter weight measuring means for measuring a weight of the helicopter;noise generating area database means for storing noise levels with respect to parameters of descending speed, airspeed, descending angle, rotor rotational speed and weight of helicopter; andflight route calculating means for determining a low-noise level flight route by setting a plurality of flight routes on the basis of the helicopter position and landing point and by referring to the noise generating area database with regard to those data from each measuring means,wherein the flight route calculating means modifies a preselected flight route on the basis of the noise data from the data receiving means, and reselects an optimal flight route.