| 摘要 |
<p>PURPOSE:To attain positioning with high precision by estimating the position of a target from the relative position of the target with a movable body and the position of the movable body and performing feedforward control for the target which repeats almost equal position fluctuation at a constant cycle. CONSTITUTION:In the tracking control of a XCR, the position of a magnetic tape on a rotary cylinder can be varied based on the position fluctuation of a post P4 turned integrally with a motor 6-1 and an arm 6-2. A first detector 7 outputs the relative position error signal (b) of a magnetic head 5 with a signal track. Also, a second detector 8 outputs the position signal (c) of the post P4. A position estimator 9 adds the signals (b) and (c) with a prescribed gain, and estimates and calculates the track deviation of the signal track. A signal (d) that is an estimated result is inputted to a position controller 11, and the post P4 can be controlled by supplying a power corresponding to the signals (d) and (c) to the motor 6-1 with the controller 11. In such a way, the position of the magnetic tape i.e. the position of the signal track can be adjusted.</p> |
