초록 ▼

The disclosed flight control system includes a rotor blade speed monitor for monitoring the rotor blade speed of the jet powered tri-mode aircraft and for outputting a rotor blade speed command. The flight control system also includes an aircraft attitude controller for controlling the aircraft atti

The disclosed flight control system includes a rotor blade speed monitor for monitoring the rotor blade speed of the jet powered tri-mode aircraft and for outputting a rotor blade speed command. The flight control system also includes an aircraft attitude controller for controlling the aircraft attitude of the jet powered tri-mode aircraft. Weighted rotor blade attitude stabilization commands and weighted aero surface attitude stabilization commands are output from the aircraft attitude controller to distribute power, control, and lift between the rotor blade and the aero surfaces. Relative weights of the weighted rotor blade attitude stabilization commands decrease with increasing aircraft travelling velocities, and relative weights of the weighted aero surface attitude stabilization commands increase with increasing velocities. A rotor blade lift controller receives the weighted rotor blade attitude stabilization commands and the rotor blade speed commands, and positions the rotor blade swashplate to adjust lift and control according to these commands. An aero lift controller receives the weighted aero surface attitude stabilization commands and deploys the aero surfaces to generate lift and control according to the received weighted aero surface attitude stabilization commands.

대표청구항 ▼

[ I claim:] [1.] A method of stabilizing a jet-powered tri-mode aircraft as the jet-powered tri-mode aircraft travels in a transitional mode, which is between a helicopter mode and a fixed-wing mode, the method comprising the following steps:measuring a rotor blade speed of the jet-powered tri-mode

[ I claim:] [1.] A method of stabilizing a jet-powered tri-mode aircraft as the jet-powered tri-mode aircraft travels in a transitional mode, which is between a helicopter mode and a fixed-wing mode, the method comprising the following steps:measuring a rotor blade speed of the jet-powered tri-mode aircraft;comparing the measured rotor blade speed to a scheduled rotor blade speed;detecting a difference between the scheduled rotor blade speed and the measured rotor blade speed;changing a swashplate collective position of the jet-powered tri-mode aircraft in response to the detected difference between the scheduled rotor blade speed and the measured rotor blade speed, the change in the swashplate collective position both bringing the measured rotor blade speed a first amount closer to the scheduled rotor blade speed and changing a flight path of the jet-powered tri-mode aircraft;measuring the flight path of the jet-powered tri-mode aircraft;comparing the measured flight path to a scheduled flight path;detecting a difference between the scheduled flight path and the measured flight path; andchanging an aircraft pitch attitude of the jet-powered tri-mode aircraft in response to the detected difference between the scheduled flight path and the measured flight path, the change in the aircraft pitch attitude both bringing the measured flight path closer to the scheduled flight path and also bringing the measured rotor blade speed a second amount closer to the scheduled rotor blade speed,wherein the detected difference between the scheduled rotor blade speed and the measured rotor blade speed is partially corrected by the first amount when the swashplate collective position is changed, and partially corrected by the second amount by the change in the aircraft pitch attitude.