How can I simulate a normal distribution?

[Mari]

Hello

I want to simulate temperatur that change over time. Most of the time the temperatur is going to stay at the temperatur that the user has chosen....but sometimes it will change some degrees up or down. I want it to behave as if I had a regulator that tried to keep the temperatur at a chosen value, but sometimes it did not manage.... The best way would be if the temperatur changed only one degree at the time (not jumping from 18 degrees to 22 degrees). Have anyone any suggestions on how to do this?

-Mari

[mfitzsimons]

Here is a freebie that should do the trick

Matt

Certified LabVIEW Developer

[mfitzsimons]

Fixed Verison of code.

Matt

[Mari]

Thanks for your help Matt! I have tested your program, and it works well when you choose to have a start value at 20 and low limit 19 and upper limit at 21, but when you choose to extend the interval, the value is only changing in the upper region (tried it with lower limit 15 and upper limit 22,5 and startvalue 20...then it only varied between 22,5 and 25). There is also a problem that when you change the values during run-time there are no changes....you have to stop the program from running and start it again before the changes are shown in the graph.

-Mari

[Mari]

correction--- I tried it with lower limit 15 and upper limit 25...then it only varied between 22,5 and 25

[TiTou]

Hello Matt,

I am also interested in that bit of code, could you save it in LV 7.1 and repost please ?

Thanks alot !

[JeanPierre]

You need the Gaussian White Noise Waveform.vi
It is not in the Base Package though.

[mfitzsimons]

It has to do with probability.  The original was was to add or subtract based on < or > .5 so that is why it would not get the full swing.  Added more randomizers and now you can see the full swing.  Used LV 8.0 to save to 7.1 version.

Matt

Message Edited by mfitzsimons on 06-01-2006 07:14 AM