Calculate forces used by fourth-order point mass
Equations of Motion/Point Mass
The applied forces [Fx Fz]T are in a system defined as follows: x-axis is in the direction of vehicle velocity relative to air, z-axis is upward, and y-axis completes the right-handed frame. They are functions of lift (L), drag (D), thrust (T), weight (W), flight path angle (γ), angle of attack (α), and bank angle (μ).
|First||Contains the lift in units of force.|
|Second||Contains the drag in units of force.|
|Third||Contains the weight in units of force.|
|Fourth||Contains the thrust in units of force.|
|Fifth||Contains the flight path angle in radians.|
|Sixth||Contains the bank angle in radians.|
|Seventh||Contains the angle of attack in radians.|
|First||Contains the force in x-axis in units of force.|
|Second||Contains the force in z-axis in units of force.|
The flat Earth reference frame is considered inertial, an excellent approximation that allows the forces due to the Earth's motion relative to the “fixed stars” to be neglected.