| 摘要 |
PCT No. PCT/JP91/01473 Sec. 371 Date Jun. 15, 1992 Sec. 102(e) Date Jun. 15, 1992 PCT Filed Oct. 29, 1991 PCT Pub. No. WO92/09016 PCT Pub. Date May 29, 1992.A predictor (20) and a learning device (20) are newly provided to a conventional speed controlling system for a rotating body, according to the present invention. The predictor predicts an instantaneous speed error on the basis of a plurality of speed errors to enable elimination of a phase delay due to sampling. The learning device is effective to remove torque ripple components of a motor on the basis of the speed errors. As a result, it is possible to expand a speed controlling region of the motor and to decrease irregularlity in rotation of the motor to a great extent. The predictor solely makes it possible to obtain a present accurate rate of change of data previously sampled from a plurality of sampled data, whereby a phase delay due to digital processes may be prevented.
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