Documentation |
Calculate forces used by fourth-order point mass
The 4th Order Point Mass Forces (Longitudinal) block calculates the applied forces for a single point mass or multiple point masses.
The applied forces [F_{x} F_{z}]^{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).
$$\begin{array}{l}{F}_{z}=(L+T\mathrm{sin}\alpha )\mathrm{cos}\mu -W\mathrm{cos}\gamma \\ {F}_{x}=T\mathrm{cos}\alpha -D-W\mathrm{sin}\gamma \end{array}$$
Input | Dimension Type | Description |
---|---|---|
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. |
Output | Dimension Type | Description |
---|---|---|
First | Contains the force in x-axis in units of force. | |
Second | Contains the force in z-axis in units of force. |