Digital servo-control system
AssigneeHitachi, Ltd.
InventorsTsutomu Omae, Sanshiro Obara, Kenji Kubo, Masahiko Watanabe
Life of this patent
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Abstract
A digital servo-control system used for driving a machine with a plurality of drive shafts having a digital type multi-axis position control unit, provided in common to all of the drive shafts, for computing a torque command value for each drive shaft on the basis of a position detection value detected by a position detector provided for each drive shaft and a position command value for each drive shaft, and torque control units, respectively provided in correspondence to a plurality of motors adapted to drive the respective drive shafts, for controlling output torque of a corresponding motor in accordance with the computed torque command value.
Claims3
A digital servo-control system comprising:
- a plurality of motors for driving a plurality of drive shafts of a machine, respectively;
- position detection means for detecting a position of each of said plurality of drive shafts and producing a position signal;
- multi-axis position commanding means for producing a position command signal indicative of a position command value for each of said plurality of drive shafts;
- digital type multi-axis position control means for receiving said position signal and said position command signal, for computing a torque command value for each drive shaft on the basis of a position detection value contained in said position signal and said position command value and for producing a torque command signal;
- and
- torque control means, provided in correspondence with each of said plurality of motors, for receiving said torque command signal and controlling an output torque of a corresponding motor in accordance with said torque command value contained in said torque command signal.
Dependencies are inferred from the claim text.