Calculate fourth-order point mass
The translational motions of the point mass [XEast XUp]T are functions of airspeed (V ) and flight path angle (γ),
where 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. The mass of the body m is assumed constant.
Specifies the input and output units:
Meters per second
English (Velocity in ft/s)
Feet per second
English (Velocity in kts)
The scalar or vector containing the initial flight path angle of the point mass(es).
The scalar or vector containing the initial airspeed of the point mass(es).
The scalar or vector containing the initial downrange of the point mass(es).
The scalar or vector containing the initial altitude of the point mass(es).
The scalar or vector containing the mass of the point mass(es).
|First||Contains the force in x-axis in selected units.|
|Second||Contains the force in z-axis in selected units.|
|First||Contains the flight path angle in radians.|
|Second||Contains the airspeed in selected units.|
|Third||Contains the downrange or amount traveled East in selected units.|
|Fourth||Contains the altitude or amount traveled Up in selected units.|
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.