Hi Vasile, I can't find any jal files related to PID, so probably not from me. There is some preliminary version of low pass filters (1st and 2nd order), maybe that got you confused ;)
Joep 2010/2/11 vasile surducan <[email protected]>: > I remember someone (maybe Joep?) has tested a PID library a while ago. I'm > not sure it was here or on jallist. > Anyone remember? > I've seen a thermostat with fuzzy logic enhanced PID, where the P, I and d > parameters should be different than those used in classic PID. The > thermostat have an auto-learning mode where is optimising the PID parameters > by itself, based on the temperature variation after a few ON-OFF commands. > Once the system is optimised it works fine until the load is heavily > changing. > > I'm curious how can be used such algorithm for driving a load with variable > PWM frequency. Right now I'm heating something with an unpredictive > behaviour (it can increase it's temperature or not). One requested effect > (which is not thermal) appears better with the finest granularity of the > pulse (high PWM frequency, many pulses), but controlling the secondary > effect (heating) means a large granularity of the pulse (small PWM > frequency, less pulses). So, the process optimalisation require an > automating switching (better a proportional one) between those two > situations. The simplest way I'm thinking is defining a delta range before > reaching the requested temperature which can control the frequency of the > PWM. How this sound to you guys? > > thx, > Vasile > > -- > You received this message because you are subscribed to the Google Groups > "jallib" group. > To post to this group, send email to [email protected]. > To unsubscribe from this group, send email to > [email protected]. > For more options, visit this group at > http://groups.google.com/group/jallib?hl=en. > -- You received this message because you are subscribed to the Google Groups "jallib" group. To post to this group, send email to [email protected]. To unsubscribe from this group, send email to [email protected]. For more options, visit this group at http://groups.google.com/group/jallib?hl=en.
