公开(公告)号：IT1196439B

公开(公告)日：1988-11-16

申请号：IT2100886

申请日：1986-07-02

Applicant: UNITED TECHNOLOGIES CORP

Inventor： HOWLETT JAMES J ,  ALANSKI IRVIN B

IPC: B64C20060101 ,  B64C

Abstract: During the first few seconds after an engine failure, autorotation is established automatically by an Automatic Flight Control System. The system has collective, pitch, roll, and yaw channels and receives engine failure signal, and signals of rotor speed, a rotor speed reference value for autorotation, rotor acceleration, load factor limit for the helicopter, a load factor as measured, pitch rate, airspeed, roll angular acceleration, yaw acceleration, and a yaw reference signal of desired yaw attitude during autorotation. A shaping circuit (21) is responsive to rotor speed (NR), rotor acceleration (NR), and to a pilot-selected desired rotor speed (22) to provide a collective command signal (theta 0) on a line (24), through the switch (14) when armed, to the collective channel of an Automatic Flight Control System (AFCS) (26) for automatically adjusting the collective pitch of the rotor so as to maintain a desirable autorotation rotor speed, such as 100% NR.

公开(公告)号：IT8621008D0

公开(公告)日：1986-07-02

申请号：IT2100886

申请日：1986-07-02

Applicant: UNITED TECHNOLOGIES CORP

Inventor： HOWLETT JAMES J ,  ALANSKI IRVIN B

IPC: B64C20060101 ,  B64C