Abstract:
A nonlinear
observer of friction torque is formulated for valve controlled
servomotor system. The effect of the observer is studied with
simulating method and its applied condition is analyzed. When
the above observer is not suitable foe use, a simple PID
controlling method with variable parameters is presented. The
method has been proved to be effective by the experimental
results.
Key words:
Nonlinear observer Friction torque PID with variable parameters
Manuscript received on July
28, 1993
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