SHAFT ROTATION SPEED REGULATION DEVICE FOR A GAS TURBINE GENERATOR IN A ROTORCRAFT, ROTORCRAFT EQUIPPED WITH SUCH A DEVICE AND ASSOCIATED REGULATION METHOD

摘要

The present invention relates to a device (1) for regulating a rotational speed, called the rotation speed NG, of a shaft (9) of a gas generator (4) of at least one turbine engine (5). a rotorcraft (3), said rotorcraft (3) comprising: .cndot. at least one main rotor (2) for generating at least one lift and / or propulsion of said rotorcraft (3) in the air, .cndot. a control member (6) of a collective pitch of the blades (7) of said at least one main rotor (2), said control member (6) for generating a command setpoint Cp of said collective pitch, .cndot. at least one turbine engine (5) capable of rotating said at least one main rotor (2), said at least one turbine engine (5) producing at least temporarily a driving torque TQ transmitted to said at least one main rotor (2), and .cndot. measurement means (8) for measuring at any moment a measurement of said engine torque TQ transmitted by said at least one turbine engine (5) to said at least one main rotor (2).