PO 6.2.10

14.1. Example 1

In this example, the Monostatic RCS of a plane is calculated. The normal vectors of the geometry are duplicated for this simulation.

 

Step 1

Start newFASANT.

Start newFASANT window

 

Step 2 

Select File and click on New.

New File

 

 

Step 3 

Select PO.

Method Type selection

 

 

Step 4

Click on Geometry→Surface →Plane, which introduces the first and the second point dialogue as shown in the next Figure.

In this example the user enters the following parameters into the command line:

·         First corner of plane: -0.5 -0.5 0

 

·         Plane size [width depth]: 1 1

 

Create plane command

 

Step 5

Click on Simulation → Parameters.

 

On the top left side of the newFASANTwindowenter the desired parameters for this simulation, as shown in next Figure.

 

Simulation Parameters Menu

 

Step 6 

Select 1 bounce (simple reflection) and a frequency of 0.3 GHz as shown and left-click the Save button.

 

Simulation Parameters panel

 

 

Step 7

Select RCS → Parameters.

 

This command appears in the top left side of the newFASANT window as shown in the next Figure.

 

RCS Menu

 

Step 8

Select Monostatic RCS only, and left-click on the Save button.

RCS Parameters panel

 

 

Step 9 

Select Output and left-click on Observation Directions. 

Observation Directions Menu

 

 

Step 10 

Introduce the far-field observations (cuts, points and sweep angles), as shown in the next Figure and left-click on the Save button.

Observation Directions panel

 

 

Step 11 

Before running the case, select Meshing → Create Mesh.

 

Meshing Parameters Menu

 

 

Step 12 

Select 1 processor and define the curvature mesh option with a distance error of 10 and surface error of 0.08 and left-click on Mesh.

Meshing Parameters panel

 

 

Left-clicking on Mesh enables the meshing engine as shown in the next Figure:

 

Mesh process

In order to visualize the mesh, then Meshing-->Visualize Existing Meshing and select the .msh file. 

 

Mesh visualization

  

Step 13 

Select Calculate → Execute and then indicate the a number of processors available to simulate this case.

Execute panel

 

 

Execute information

 

 

Step 14 

When the simulation finishes, we can visualize the simulation results. Click on Show Results → Far Field → View Cuts, which allows the user to show the RCS graphic (in the next figure).

 

Far Field View Cuts Menu

  

RCS Graphic

  

Step 15 

Click on Show Results → Far Field → View Text Files. Then select the Steps and the order and press OK to show the RCS data file.

Far Field View Text File panel

 

 

Result Text File visualization

 

 

This example has been executed using a plane whose normal vector is along the Z-axis. The user can duplicate this vector and simulate the problem again using duplicate normal vectors.  After the simulation, the user can visualize the results to see the differences between one normal vector and two duplicated normal vectors. To view the normal vectors of this geometry, click the icon , as shown in the next Figure.

 

Appearance Normals visualization

 

Step 16

 

To duplicate the normal vectors click on Simulation → Duplicate Normals.

 

Duplicate Normals Menu

 

 

Then select the object to duplicate the normal vector and left-click the Add button in the right panel that has appeared.

 

Duplicated Normals visualization

 

 

Step 17 

Re-mesh the geometry and start the simulation again, like in step 12 and 13. The process is simply the same.

 

Mesh window

 

Step 18 

Click on Show Results → Far Field → View Cuts, to show the RCS graphic like in step 14. In this case, we can notice that the result is different.

 

RCS Graphic

 

 

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