MTS Multipurpose Elite Test - Manual (Page 92)

Note:
The MPE application does not require the names of profile channels to be the same as the names
of station channels. You can arbitrarily map any profile channel to any station channel. You can
also map one profile channel to multiple station channels.
• Use the Profile activity to also select the control mode of a profile channel. For this to work (if the dimension
used to define the end levels of the profile is a standard engineering dimension, such as force or length),
the dimension must match one of the control mode dimensions available to the current station configuration.
6.2.11.9.0 Normalized Dimensions
If you create a profile using a normalized dimension, such as ratio, percentage, unitless, or volts, you can
select any of the control modes available to the station configuration when selecting the control mode for the
profile channel.
When you do this, you define the full-scale value of the normalized dimension by selecting one of the control
modes and its associated engineering dimension available in the Control Mode list on the Channels panel,
along with a unit type and a Level Multiplier value. MPE converts all end-level values in the profile to command
levels accordingly.
Example
Suppose you create a station configuration that uses the force dimension for a force control mode, and the
length dimension for a displacement control mode. In addition, suppose you create a profile in which you
select the volts dimension to define end levels.
Next, you start MPE against the station configuration, add a Profile activity, and select the profile you have
created. On the Channels panel, you select a profile channel. In this scenario, both displacement and force
will be available in the Control Mode list.
Suppose you select displacement, and type a value of 5 cm in the Level Multiplier box. This will cause all
of the end-level values in the profile to be converted to displacement values. For volts, the full-scale value
equals 10 volts, which MPE will play out as 5 cm. So in this case, if the first end-level values in the profile are
2 volts and 9 volts, they will be played out as 1 cm and 4.5 cm.
Using the same profile, suppose you change the control mode selection to force, and enter a Level Multiplier
value of 100 N. This will cause all of the end levels in the profile to be converted to force values. In this case,
MPE will play out 10 volts as 100 N. So if the first end-level values in the profile are 2 volts and 9 volts, they
will be played out as 20 N and 90 N.
Full-scale values of normalized dimensions
Normalized Dimensions
Full-Scale Value Dimension
1:1 Ratio
100% Percentage
1.0 Unitless
10 V Volts
92 Multipurpose Elite Test Design Guide
6.0 Creating Advanced Tests