| 摘要 |
<p>PURPOSE:To converge upon a target speed in a short time and also to reduce fluctuations in speed and then to perform the stable operation even when the target speed for servo is changed. CONSTITUTION:When the target speed is changed during servo driving control, a phase compensation error value which is an added output of an adding part 52 is fetched in a correcting value setting part 54 to be set as a PWN servo correcting value. Then, in a K setting part 34, a constant K is changed to a pertinent value, while in a phase compensation filter 36, Un-1 is initialized to become '0', so that reel servo control is restarted. Thus, the correcting value is added to the phase compensation error value Yn of a phase compensation filter 36 by the adding part 52, so that an error value after addition is inputted to a PWM processing part 38 to generate a PWM servo signal.</p> |
