초록 ▼

An aircraft speed control system wherein the commanded lift floor (minimum lift) is increased in accordance with an anticipated decrease in headwind between headwind during final landing approach and that anticipated at touchdown. The system includes means for generating a signal which is a function

An aircraft speed control system wherein the commanded lift floor (minimum lift) is increased in accordance with an anticipated decrease in headwind between headwind during final landing approach and that anticipated at touchdown. The system includes means for generating a signal which is a function of the difference between the headwind aloft and the headwind anticipated at touchdown. This signal, provided it indicates a decreased headwind at touchdown, is used to modify the programmed lift signal (which is in accordance with the angle of attack of the aircraft) to compensate the decreasing headwind condition, i.e. to increase the commanded lift floor.

대표청구항 ▼

In an aircraft speed control system including means for providing a first signal which is a function of airspeed error constituting the difference between actual airspeed and a pilot selected airspeed, means for providing a second signal which is a function of lift error (alpha error) constituting t

In an aircraft speed control system including means for providing a first signal which is a function of airspeed error constituting the difference between actual airspeed and a pilot selected airspeed, means for providing a second signal which is a function of lift error (alpha error) constituting the difference between actual lift and a pilot commanded lift, means for comparing the signals and selecting the greater of the two and a utilization mechanism connected to receive the selected signal, the improvement comprising: means connected to receive said second signal for increasing the second signal to compensate for any decrease in headwind between that during landing approach and that anticipated on the runway at touchdown including: means for providing a third signal which is a proportion of the headwind during the final landing approach of the aircraft, and means for adding such third signal to said second signal.