Hello, I'm Justin Smith, and this is NX Tips and Tricks on
Vehicle Design Automation, or VDA.
Here, we have a concept model for a double decker bus, and I have been
tasked with ensuring the design is compliant with regional standards.
I'll start out by creating an assembly to test the concept model.
I'll call this SADD1.
Once I have made a new part file, I will import the bus assembly
and constrain it to the datum.
Next, I will create two new components for the base data and layout data.
These will be imported for the Vehicle Design Automation application.
Now that the new components are added, we can open the VDA application and
select Origin for the Vehicle Coordinate System, which will be used in the
center of the bus at the front axle.
If I select base data, I can select the appropriate class of vehicle, which would
be class C for the bus, and I can enter the dimensions of the bus into base data.
However, I have already done this in a spreadsheet, which I will import into the
file using import and export expressions.
Now that I have loaded the base data in, I can select base data again, and we
can see that the dimensions of the bus are already filled in, so I select OK.
I can see that the wheelbase is lined up as needed.
I want to reference the base data for the layout as well.
I can select base data source, and then select base data, either in the graphics
window or in the assembly navigator.
Layout will now reference base data whenever it is needed, but it
will not copy the data unless it is used in the layout component.
Now that we have the layout base data set up, we can use the 2D mannequin command
to add a driver and passenger to the bus.
I will start with the driver, and I will want to use this SAE standard and
make the driver a 95th percentile human.
I could also change the posture definition here if needed,
but this will be fine for now.
I will want to check for each of these outputs though.
Looking through the results, we can see that the ankle angle is slightly out of
range, as well as the driving posture.
We can repeat this with the passengers, but we won't view
results for this demonstration.
For the passenger up here, we'll select a 50th percentile human.
For the passenger back here, we'll select a 10th percentile human.
We can see the sketches for each of the 2D mannequins we created
and how they fit in the bus now.
Next, I will select eye ellipse, determine the standard, and review the
clearance values before selecting finish.
I can go to groups in the part navigator to show or hide
different parts of the eye ellipse.
For now, we'll just show the eye ellipse.
Next, I want to check the windshield vision zones, so I select this function.
Since we already defined the eye ellipse, I will select this one.
I will also want to make sure I am using the correct standard
and vehicle classification.
Then, I will select the windshield surfaces, and I can
select the wiper system pattern.
If I click on the book icon here, a small window will display an
example of the pattern type.
We will use a double pantograph.
Then, I can select the pivot point for the wipers, left and then right.
Then, I will change the arm length and blade length to match that of the bus.
Then I'll click OK.
We can see that the wipers cover the required areas here.
In this demonstration, we imported a concept model into a new assembly and
imported base data to use for our layout.
We then placed 2D mannequins in the bus and created an eye ellipse to
test the windshield vision zones.
Thank you.