Patent ID: 6239572
Filing Date: 2001-05-29
Classification: G05B,G11B

Abstract:
A servo control apparatus for performing a feedback control to an analog controlled system comprising:(A) an error generating device that generates a digital error corresponding to a difference between a desired value and a feedback value corresponding to a controlled variable of the analog controlled system;(B) a control device that generates a digital manipulated variable; and(C) a digital-to-analog converting device that converts the digital manipulated variable into an analog manipulated variable for driving the analog controlled system,wherein the control device comprises:(b1) a disturbance estimating device that estimates a disturbance applied to the analog controlled system by carrying out a digital estimating process by using the digital manipulated variable and the digital error, and generates a digital compensated variable corresponding to the estimated disturbance; and(b2) a manipulated variable generating device that generates the digital manipulated variable by using the digital error and the digital compensated variable.