Enable JavaScript to interact with content and submit forms on Wolfram websites. Learn how

WOLFRAM SYSTEM MODELER

ReferenceTrajectory

Draws the reference 3D trajectory as a parametric curve

Diagram

Wolfram Language

In[1]:=

SystemModel["Aircraft.Physical.AuxiliaryObjects.ReferenceTrajectory"]

Out[1]:=

Information

This model visualizes a reference flight trajectory exactly according to the input signals of reference altitude (uRefAlt), reference total velocity (uRefVtot) and reference track angle (uRefTrack) starting from the initial value of the reference altitude and the given initial lateral position in the world frame x-y plane (initialLatPosition). If the absolute value of the first time derivative of the reference altitude, exceeds the reference total velocity at any time, the total velocity is increased to the absolute value of the first time derivative of the reference altitude and a corresponding warning is given.

Parameters (2)

initialLatPosition	Value: Type: Position[2] (m) Description: Initial lateral position of the aircraft (x and y coordinates in world frame)
sphereDiameter	Value: 5 Type: Diameter (m) Description: Diameter of sphere

initialLatPosition

Value:

Type: Position[2] (m)

Description: Initial lateral position of the aircraft (x and y coordinates in world frame)

sphereDiameter

Value: 5

Type: Diameter (m)

Description: Diameter of sphere

Connectors (4)

	uRefAlt	Type: RealInput Description: Reference altitude
	uRefTrack	Type: RealInput Description: Reference track
	uRefVtot	Type: RealInput Description: Reference total velocity
	refPosition	Type: Frame_b Description: Frame connected to the reference position

Components (15)

	prismaticX	Type: Prismatic Description: Joint allowing movement along world frame x-axis
	prismaticY	Type: Prismatic Description: Joint allowing movement along world frame y-axis
	prismaticZ	Type: Prismatic Description: Joint allowing movement along world frame z-axis
	refVx	Type: Speed Description: Reference world frame x-component of total velocity
	refRz	Type: Position Description: Reference world frame z-component of position
	signChange	Type: Gain Description: Converts positive altitude into negative world frame z-coordinate
	alt2vz	Type: Derivative Description: Converts reference altitude signal into reference vertical velocity
	groundSpeed	Type: Pythagoras Description: Solves ground speed from total velocity and vertical velocity
	sinTrack	Type: Sin Description: Sine of reference track angle
	cosTrack	Type: Cos Description: Cosine of reference track angle
	refVy	Type: Speed Description: Reference world frame y-component of total velocity
	vGround2vy	Type: Product Description: Solves velocity world frame y-component
	vGround2vx	Type: Product Description: Solves velocity world frame x-component
	worldFrame	Type: Fixed Description: Fixed frame to world origin
	refTrajectory	Type: FixedShape Description: Visualizing an elementary shape with dynamically varying shape attributes (has one frame connector)

Used in Examples (1)

AutopilotPIDTune

Aircraft.Examples

Example of tuning autopilot PID controllers