Method and Device for Flying an Aircraft According to at Least One Flying Line

A method of piloting an aircraft according to at least one piloting axis of said aircraft, according to which method:

• A/ a control value is determined which corresponds to the value of a piloting instruction relating to said piloting axis, said value being representative of the actuation of at least one control member (3) of the aircraft, by a pilot of said aircraft;
• B/ an actual controlled value is determined which corresponds to the value of said piloting instruction, actually applied to the aircraft;
• and
• C/ a slaving of the aircraft relating to said piloting instruction is effected, with the aid of said control value and of said actual controlled value, by applying to the aircraft an instruction making it possible to zero, if appropriate, the difference between said control value and said actual controlled value,
• wherein:
• an auxiliary control value which is closer to said actual controlled value than said control value is calculated on the basis of said control value and of said actual controlled value;
• a monitoring of said control value making it possible to detect a pilot induced oscillation is effected;
• and
• in the event that a pilot induced oscillation is detected, the slaving in step C/ is effected with the aid of said actual controlled value and of said auxiliary control value.

A device for piloting an aircraft according to at least one piloting axis, said device (1) comprising:

• first means (2) for determining a control value which corresponds to the value of a piloting instruction relating to said piloting axis, this value being representative of the actuation of at least one control member (3) of the aircraft by a pilot of said aircraft;
• second means (5) for determining an actual controlled value which corresponds to the value of said piloting instruction, actually applied to the aircraft;
• and
• third means (6) for effecting, with the aid of said control value and of said actual controlled value, a slaving of the aircraft relating to said piloting instruction, by applying to the aircraft an instruction making it possible to zero if appropriate the difference between said control value and said actual controlled value,
• wherein:
• said device (1) moreover comprises:
• fourth means (15) for calculating, on the basis of said control value and of said actual controlled value, an auxiliary control value which is closer to said actual controlled value than said control value;
• and
• fifth means (16) for effecting a monitoring of said control value, making it possible to detect a pilot induced oscillation;
• and
• said third means (6) are formed so as to effect the slaving with the aid of said actual controlled value and of said auxiliary control value, in the event that said fifth means (16) detect a pilot induced oscillation.