| 主权项 |
1. A method of regulating a power plant of a rotary wing aircraft, the power plant comprising a first engine group, a second engine group, and a main power transmission gearbox, the two engine groups mechanically driving the main gearbox in order to rotate a main outlet shaft of the main gearbox, the main outlet shaft being constrained to rotate with a main rotor of the aircraft having a frequency of rotation NR, the first engine group having at least two main engines, the second engine group having at least one secondary engine, each main engine having a plurality of main operating limits and operating with first margins respectively relative to each of the main operating limits, each secondary engine having a plurality of secondary operating limits and operating with second margins respectively relative to each of the secondary operating limits, the method comprising the following steps:
determining a first setpoint NR* for the frequency of rotation NR of the main rotor; regulating the operation of each main engine on the first setpoint NR* for the frequency of rotation NR; determining a second setpoint W2* for power to be delivered by the second engine group, so that each secondary engine operates with the lowest second margin that is equal to the lowest first margin of the first engine group; and regulating the operation of each secondary engine on the second setpoint W2* for power. |
