| Aerospace Blockset™ | |
Equations of Motion/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 [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
, drag
,
thrust
, weight
,
flight path angle
, angle of attack
, and bank angle
.
| 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. |
The flat Earth-fixed 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.
4th Order Point Mass (Longitudinal)
6th Order Point Mass (Coordinated Flight)
6th Order Point Mass Forces (Coordinated Flight)
| 4th Order Point Mass (Longitudinal) | 6DoF Animation | |
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