公开(公告)号：CA978255A

公开(公告)日：1975-11-18

申请号：CA166918

申请日：1973-03-13

Applicant: IBM

Inventor： MITCHELL JOHN O ,  ROBERTS SPENCER D ,  VAN PELT RICHARD W

IPC: H02P3/10 ,  G05B19/23 ,  G05D3/12 ,  G11B15/48 ,  H02P7/288

Abstract: A motor, moving at a known speed, is stopped in a controlled manner by a speed control servomechanism which compares the actual speed-versus-distance deceleration profile to an optimum or desired speed-versus-distance deceleration profile, and variably controls the reverse energization, or plugging, of the motor in a manner devised to achieve the desired profile. When the speed servo has reduced motor speed to a low level, and preferably zero, a stop-lock control servomechanism is enabled to position and maintain the motor at a preselected stop-lock position. The stop-lock servo implements a motor-control algorithm which, for a given position error, provides a higher magnitude motor energization when the motor is moving away from the stop-lock position than when the motor is moving back toward the stop-lock position. This control algorithm provides increased servo gain when the motor is moving away from the stop-lock position.

公开(公告)号：CA944072A

公开(公告)日：1974-03-19

申请号：CA130926

申请日：1971-12-23

Applicant: IBM

Inventor： VAN PELT RICHARD W ,  WERNER ALLEN J

IPC: G11B15/58