stegande bandtransport with adaptable forsterkningsreglering

摘要

ADAPTIVE GAIN CONTROL IN AN INCREMENTING MAGNETIC TAPE TRANSPORT In a rotating head magnetic tape transport, the tape is maintained stationary as the head sweeps a selected data track. A length of tape is buffered in a vacuum column between a supply spool and a rotating head station. A take-up spool on the opposite side of the head station is controlled by minimizing the overshoot or undershoot of the motor driving the take-up spool as the radius of the amount of tape on the spool increases or decreases (i.e., change). After a step operation, the overshoot or undershoot of the motor is measured and compared with a reference range to determine if the undershoot or overshoot is within the reference range. If the measured quantity is within the reference range, no adjustment is made. If the measured quantity is outside of the reference range, the gain of the take-up motor is adjusted.