Re: PID question

joseph2k wrote:
John Popelish wrote:

See:
http://en.wikipedia.org/wiki/Kalman_filter
http://www.cs.unc.edu/~tracker/media/pdf/SIGGRAPH2001_CoursePack_08.pdf

Nice links, the wiki still hits the hard math a little too quick and not
enough explanation. The second link is really good. I could probably use
it to learn the deep stuff that is hard follow in the wiki.

I have been reading about Kalman filters for a long time, but I haven't yet had an industrial control application that cried out for it loud enough to make me learn how to actually use it. One of these days, perhaps.

I have managed to apply a couple of Smith Predictors, which are sort of related but deal with delay in a control loop, instead of noise.
http://www.controleng.com/article/CA188333.html
.