Patent ID: 8568096
Filing Date: 2013-10-29
Classification: B64C,G05D

Abstract:
1. A control and regulation method for a rotorcraft having at least one main lift rotor, at least one variable-pitch propulsive propeller ( 6 ), and at least one power source for driving the main rotor(s) and at least one propeller ( 6 ), said method consisting in generating at least one mean pitch setpoint βtcl* for the propeller(s) ( 6 ) as a function of thrust variation control order Tcl and as a function of the power consumed by the propeller(s) ( 6 ), wherein the method consists in defining a plurality of operating modes, including the following: a direct mode, in which the value of the mean pitch results directly from the thrust variation control order Tcl; a forced mode, in the event of the main rotor(s) also rotating, in which the mean pitch is forced automatically under control of the pilot to a calculated pitch value; a regulated mode, in which the power consumed by the propeller(s) ( a protected mode that is activated when operating in the various other operating modes other than forced mode, in the event of at least one of various limiting physical parameters reaching or exceeding its corresponding limit, and in which the mean pitch setpoint βtcl* is reduced automatically.