FRACTIONAL ORDER POLE MODELS FOR ROBUST CONTROL ON INTERNET: www.PIDlab.com

This paper describes the simple Internet tool for fractional order pole models the Java applet free accessible on www.PIDlab.com. The applet implements procedures described in the authors’ previous works, where the value set approach to fractional order pole systems was presented for the case, when following characteristic numbers of the process were obtained: a) one sample of the process frequency response, b) first three moments of the process impulse response. Using the applet, we can easily compute value sets and find the upper hard bound of the value sets for the case, when one/two frequency response samples and first three moments of the impulse response are known simultaneously. Then we can determine processes on the value set boundary which will be further important for robust controller design.