LTSpice - Monte Carlo and Worst Case Simulations

[@mdistiyak6460]

can't find definition of model "MC" , I am getting this error

[@emreer7542]

Thank you very much, helped a lot!

[@daleterdan1499]

Just as a side note a large 500uF capacitor is likely an electrolytic capacitor which has dielectric absorption. It can be modeled as a number of series RC capacitors which has more stored energy than depicted in the circuit shown. Dielectric absorption normally increases with temperature.

[@akrcusat]

Thank you

[@mikemartin101]

What is the purpose of the "tolerance" field in the component? Does it perform a different function?

[@MrMarth29200]

It allows youth choose a tolerance value for the component. If you want a 5% tolerance on your component you can set and change easily.

[@andrexld2]

What is the "flat" function? And what did are you do to solve the model problem?

[@robertwoodruff7473]

The flat function is used as a way to generate a (psuedo) random number. Flat(x) will return a number between -x and +x with equal probability of being less than or greater than 0. The error I was gettting when I paused the video was caused by the fact that I was missing an end parenthesis ")" in my component definitions.

[@ShadowTudor]

I'm a bit noob with LT Spice could you please tell me how did you add the voltage source ? (without using Place part -> Voltage)

[@MrMarth29200]

You can use the keyboard shortcut to open it by pressing F2

[@harrydymond4488]

As you note, with this method of worst-case analysis, you need to do a lot of runs to guarantee that you "hit" all of the possible extreme values, as the values are being changed randomly. A method that simulates each combination of extreme component values exactly once is detailed here: k6jca.blogspot.com/2012/07/monte-carlo-and-worst-case-circuit.html (scroll down to the heading "Optimized Worst-case Analysis")

[@Jorrow]

wut