pid parameters determining

Hi there, I need to find out the three parameters of a pid thermal
regulator of an induction heating oven. Is the Ziegler-Nichols the
most usefull method to get Kp, Ki and Kd? How can I determin the
transfer function of the system?
Thanks,
Marco
Reply to
Marco
Loading thread data ...
ZN may not be the best, but I can't say what is till you define 'best". ZN method includes the system test that allows you to determine the coefficients, assuming they will let you play with the actual system enough to complete the test without an operator having a heart attack.
Reply to
John Popelish
Get St. Clair's booklet at
formatting link
Walter
Reply to
Walter Driedger
Thanks everybody for asking me back, but I've got one more question. Do anyone knows a brief and comprehensive explanation of the three control parameters Kp, Ki and Kd? I need to get some rules like "if you increase Kp the system will... because Kp does..." for each of them, letting me understand their meaning and what happens tuning one or another. Thanks, Marco
Reply to
Marco
I wrote a non mathematical tutorial on tuning PID controllers based on observing a trend of the process. It is available, online at:
formatting link
goes into some detail on the effects of the three components.
Reply to
John Popelish

PolyTech Forum website is not affiliated with any of the manufacturers or service providers discussed here. All logos and trade names are the property of their respective owners.