Main Content

6th Order Point Mass Forces (Coordinated Flight)

Calculate forces used by sixth-order point mass in coordinated flight

  • 6th Order Point Mass Forces (Coordinated Flight) block

Libraries:
Aerospace Blockset / Equations of Motion / Point Mass

Description

The 6th Order Point Mass Forces (Coordinated Flight) block calculates the applied forces for a single point mass or multiple point masses. For more information on the system for the applied forces, see Algorithms.

Limitations

  • The block assumes that there is fully coordinated flight, i.e., there is no side force (wind axes) and sideslip is always zero.

  • The flat Earth reference frame is considered inertial, an approximation that allows the forces due to the Earth motion relative to the "fixed stars" to be neglected.

Ports

Input

expand all

Lift, specified as a scalar or array, in units of force.

Data Types: double

Drag, specified as a scalar or array, in units of force.

Data Types: double

Weight, specified as a scalar or array, in units of force.

Data Types: double

Thrust, specified as a scalar or array, in units of force.

Data Types: double

Flight path angle, specified as a scalar or array, in radians.

Data Types: double

Bank angle, specified as a scalar or array, in radians.

Data Types: double

Angle of attack, specified as a scalar or array, in radians.

Data Types: double

Output

expand all

Force in x-axis, specified as a scalar or array, in units of force.

Data Types: double

Force in y-axis, specified as a scalar or array, in units of force.

Data Types: double

Force in z-axis, specified as a scalar or array, in units of force.

Data Types: double

Algorithms

This figure shows the applied forces in the system used by this block.

The applied forces [FxFyFh]T are in a system is defined by x-axis in the direction of vehicle velocity relative to air, z-axis is upwards and y-axis completes the right-handed frame and are functions of lift (L), drag (D), thrust (T), weight (W), flight path angle (γ), angle of attack (α), and bank angle (μ).

Fx=TcosαDWsinγFy=(L+Tsinα)sinμFz=(L+Tsinα)cosμWcosγ

Extended Capabilities

C/C++ Code Generation
Generate C and C++ code using Simulink® Coder™.

Version History

Introduced before R2006a