Don't worry, I'm on the right direction, but have a snail speed... thx, Vasile
On 2/16/10, Joep Suijs <[email protected]> wrote: > > 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]<jallib%[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]<jallib%[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.
