Question about Complex poles and zeroes detection of Power PMAC Servo Analyzer

[shane]

In the procedure of plant transfer function Identification , the complex poles and zeros frequency can be detection automatic, but the damping factor of the poles and zeros need to trial and err for a right model. it takes a long time and you may not get the correct results;

is there any tips about how to choose a initial damping factor？

[Eric Hotchkiss]

0.7 might be a good initial guess.