Learning Forum

[elliot.saive]

Hello!

Preamble: I am using a tolerance script which calls a merit function (MF) that is optimizng for RMS wavefront error (WFE). Among others, there is an operand RWCE for WFE in that MF with weight 0.000. I have a whole tolerance table as usual, and some run-of-the-mill compensators in my script. At the end of the script, I report RWCE, which by manual inspection appears to be a reasonable and correct number. 

In my tolerance report, in the Sensitivity Analysis and the Monte Carlo simulation, I am getting two things: My WFE value from the RWCE operand as expected when using the REPORT command in my script, and also the "Nominal Criterion" which is the literal merit function value since I am using a user-defined script. For me, the WFE is the actual useful thing for real life assessment of the system. 

Here is my question: It is well and good that my report lists the WFE for each tolerance extreme in the Sensitivity analysis and each Monte Carlo output because I can read it manually and make sure I am within my performance constraints. However, what I really want is the summaries (see two screenshots) for the Sensivity analysis and the Monte Carlo analysis to be in WFE, not merit function value. 

If I were to not use a user-defined script, I'm aware I could select any criterion I want as the "nominal criterion" from the Criterion menu of the Tolerancing function. However, I have to use a script because I need to define tilt as compensators using CPAR and my tolerance data editor flips out if I try to use CPAR there.

Thank you very much.

Attachments:

sensitivity-summary: Sensitivity analysis summary which is reporting the merit function. I'd like this to be in WFE.

montecarlo-summary: Monte Carlo analysis summary which is reporting the merit function. I'd like this also to be in WFE.

 

 

[Christophe Weisse]

Hello,
Thanks for the detailed description.
I think you have ways to access the needed information:
For the Monte Carlo statistics, you can actually click on the "Statistics" cell of any column, and access the needed information:

 

With the histogram tool, you may also have a visual feedback of any tolerance operand, merit function or reported merit function operand:

For the worst offenders, you can sort the tolerance results in any order, for any column of your choice:

Does this looks OK for you ?
All the best,
Christophe

[elliot.saive]

This is great, thank you very much.

[Christophe Weisse]

Thanks for your feedback