Patent ID: 7328075

Claim:
A method of automatic adjustment of control parameters comprising the steps of: applying an iterative feedback tuning method to a feedback control system for a magnetic suspension system; determining those control parameters that have less of an effect on the control performance of the system relative to the other control parameters; selectively discarding those control parameters; and allowing the other control parameters to be guided to optimum values to obtain a response waveform desired by a designer directly from sets of input and output data of a controlled subject, wherein a proportional gain (k p ) of proportional integral control and the time constant ratio (n p ) of the numerator and denominator of a double phase advancer are adopted as control parameters that have more of an effect on the control performance of the system, relative to other control parameters on control performance of the system, for a feedback control system in which proportional integral control and double phase advancer are jointly employed in a magnetic suspension and balance system.