초록 ▼

An aircraft overspeed protection system produces proportional and integral commands for input to an autopilot controlling the aircraft. The proportional and integral commands are produced by comparing actual monitored speed of the aircraft with a target speed from a target speed selector. The target

An aircraft overspeed protection system produces proportional and integral commands for input to an autopilot controlling the aircraft. The proportional and integral commands are produced by comparing actual monitored speed of the aircraft with a target speed from a target speed selector. The target speed selector selects as the target speed a trigger speed above a nominal maximum operating airspeed of the aircraft until the trigger speed is reached by the aircraft. When the trigger speed is reached by the aircraft, the overspeed control goes into Overspeed Protect Command active mode and the target speed selector selects a new target speed below the nominal maximum operating speed of the aircraft. The overspeed protection system remains in Overspeed Protect Command active mode until the pilot takes a positive action by selecting a new autopilot mode or by disengaging the autopilot. To accommodate for a reduced effectiveness of the overspeed protection system at severe roll angles, the overspeed proportional and integral commands are weighted by a weighting factor that is a function of the measured roll angle of the aircraft.

대표청구항 ▼

[ I claim:] [1.] A method for limiting overspeed in an aircraft under autopilot control, the autopilot establishing a set of flight control parameters to seek a selected flight condition of the aircraft, comprising the steps of:selecting a trigger speed;monitoring an actual speed of the aircraft;sel

[ I claim:] [1.] A method for limiting overspeed in an aircraft under autopilot control, the autopilot establishing a set of flight control parameters to seek a selected flight condition of the aircraft, comprising the steps of:selecting a trigger speed;monitoring an actual speed of the aircraft;selecting a control speed below the trigger speed;comparing the actual speed to the trigger speed;if the actual speed of the aircraft exceeds the trigger speed, producing a first overspeed signal;supplying the first overspeed signal to an electronic controller;in response to the first overspeed signal, overriding the set of flight control parameters with the electronic controller by supplying a revised set of flight control parameters to seek a revised flight condition in which the actual speed of the aircraft approaches the control speed; andafter overriding the set of flight control parameters, maintaining the revised flight control parameters until either the autopilot is disengaged or a new set of flight control parameters is selected by a pilot.