A general solution using an elliptic integral approximation which relates flight time, aircraft airspeed, and ground distance on straight-line and circular-arc trajectory segments is developed. The solution procedure is applicable to both constant and accelerating aircraft flight. In addition, wind shear including both magnitude and heading change is incorporated in the solution. The solution equations are used in a four-dimensional (4-D) control algorithm where both flight time and final airspeed are specified. The results show that the algorithm converges rapidly and accurately.
A general algorithm for relating ground trajectory distance, elapsed flight time, and aircraft airspeed and its application to 4-D guidance
1975-02-01
Miscellaneous
No indication
English
Flight trajectory compensation system for airspeed variations
European Patent Office | 2017
|CONVERSION BETWEEN CALIBRATED AIRSPEED AND TRUE AIRSPEED IN TRAJECTORY MODELING
European Patent Office | 2019
|