You can use a segmented excitation to drive a
command in your mechanism by associating a value to each time step of the kinematics
simulation. The value is defined according to predefined segments built and plotted step
by step.
Based on the value of the excitation, the simulation determines the
configuration of the mechanism for each time increment specified in the
kinematics scenario parameters.
Before you begin: Open a kinematics simulation
referencing a mechanism in the Mechanical Systems Experienceapp.app.
From the
Scenario section
of the
action bar
click
Segmented Excitation.
The
Segmented Excitation dialog box appears.
In the tree, select a command under the mechanism representation to drive
with the segmented excitation.
Tip:
Alternatively, select the command first and click
Segmented Excitation.
Specify which segments to use for the associated curve so as to
define the segmented excitation:
Click
Add to add a segment to the excitation.
A new line is automatically added to the table.
In the table, enter a value for T start, Y start, T end, and Y end in
the dedicated columns by double-clicking each cell.
Important:
Specify every value from the start point and the
end point coordinates.
Double-click the table cells under the
Type column to select the segment type:
The
Linear segment type is selected by default
in the table.
Select
Linear to add a line segment to the curve.
L stands for Linear.
Select
Quadratic to add a square-like segment
(elliptic, hyperboloid, parabolic) to the curve.
Q stands for Quadratic.
Select
Cubic to add a three-dimensional cubic
segment to the curve.
C stands for Cubic.
Select
Quarter Sine to add a quarter sine segment
to the curve.
QS stands for Quarter Sine.
Select
Quarter Cosine to add a quarter cosine
segment to the curve.
QC stands for Quarter Cosine.
The selected segment appears in the
Plot view of the
Segmented Excitation dialog box.
Repeat step 3 to add complementary segments to the curve.
The start point coordinates are automatically specified for the next segment.
They correspond to the end point coordinates of the last segment
specified.
Once the segmented excitation is defined, click OK to
save it and exit the Segmented Excitation dialog box.
The segmented excitation
appears in the tree under the Excitations node.
Optional:
Use the
Simulation Player to animate the command values
defined in the segmented excitation.
To modify the values of a segmented excitation:
Right-click the segmented excitation in the
tree,
and select
segmented excitation_name
object > Definition.
The
Segmented Excitation dialog box appears.
To modify the T start, Y start, T end and Y end, double-click
the values and specify the new ones.
To add a new segment, click
Add.
The new segment row is inserted
after the line you selected.
.
