The invention discloses an improved
fuzzy model-free
adaptive control system and method for a radial mixing
magnetic bearing. An improved
fuzzy model-free adaptive controller, a controlled object and a displacement detection module are connected sequentially to form a closed-
loop control system; the improved
fuzzy model-free adaptive controller is formed through mutually connecting a basic model-free adaptive controller, four
fuzzy reasoning devices and a
differentiator; the
fuzzy reasoning devices I and II are used for confirming the deviation
gain factor and the fuzzy relation between the rotor
radial displacement deviation and the change rate of the rotor
radial displacement deviation respectively, and are used for correcting the deviation
gain factor in an on-line manner; and the
fuzzy reasoning devices III and IV are used for confirming the
weight factor and the fuzzy relation of variation of
radial displacement in the past, and are used for correcting the
weight factor in an on-line manner. According to the invention, as the four fuzzy reasoning devices are used for adjusting the parameters, the fluctuation of radial displacement output signals is low, and the expected displacement value can be quickly tracked.