Adaptive control technique for a dynamic system

Details Adaptive control technique for a dynamic system Adaptive control technique for a dynamic system

G - Physics

11

B

352/21.32, 352/2

G11B 5/55 (2006.01) G05D 3/14 (2006.01) G11B 21/02 (2006.01) G11B 21/08 (2006.01) G11B 21/10 (2006.01)

Patent

CA 1268858

ABSTRACT ADAPTIVE CONTROL TECHNIQUE FOR A DYNAMIC SYSTEM A controller for a voice coil motor driven disk file actuator is described. The device has an online adjustable gain characteristic for controlling movement of the actuator assembly and an estimator that estimates actuator velocity and bias. Forward gain is estimated from position and coil current measurements and compared with a nominal value to create an error signal used to adjust the controller and estimator gain characteristics. The control technique allows changes in the open loop system without changing the closed loop performance. By monitoring loop gain it is possible to alter compensator gains to maintain a constant closed loop performance.

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