MATLAB SIMULINK 3D ANIMATION 5 Bedienungsanleitung PDF herunterladen (Seite 34)

 Adding scene surrounding. This step is not crucial for visualization of

interactions between parts in a machine assembly, but it is very

important for visualization of aircraft / vehicle dynamics simulation etc.,

where the position of one object relative to the scene in which it

operates is important.

For instance, if we are to visualize a vehicle dynamics simulation, we

need to place a virtual car on a virtual road. Both object need to be to

scale (the length units in the car and road models must match), and the

car has to be placed in a correct position relative to the road. Proper car

scaling, placement and orientation in the scene can be done by defining

corresponding fields of the main object Transform node mentioned in

the “Wrapping Shape Objects by Transforms” section.

An example of a complete scene definition can be found in the

octavia_scene.wrl VRML file that belongs to the Simulink 3D Animation demo

vr_octavia.

5.3. Linking the Virtual Scene to a Simulink / SimMechanics /

MATLAB Model

The main purpose of this step is to create associations between dynamic model

object quantities and corresponding VRML object properties (positions,

rotations, etc.) to establish a live data connection between the model and the

virtual scene.

Mechanical systems are typically modelled using SimMechanics or Simulink,

but Simulink 3D Animation allows also visualization of models implemented in

MATLAB. While we will focus on using Simulink 3D Animation Simulink

functionality, we will shortly mention also specifics of using the toolbox

MATLAB interface.

5.3.1. Linking the Virtual Scene to a Simulink Model

Association of Simulink model signals to virtual scene object properties is

accomplished by the VR Sink block from the Simulink 3D Animation block

library vrlib.

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MATLAB SIMULINK 3D ANIMATION 5 Bedienungsanleitung Seite 34