- Patent Title: Servo control device, servo control method and servo control system
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Application No.: US16020398Application Date: 2018-06-27
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Publication No.: US10915072B2Publication Date: 2021-02-09
- Inventor: Akihiro Ito
- Applicant: NIDEC SANKYO CORPORATION
- Applicant Address: JP Nagano
- Assignee: NIDEC SANKYO CORPORATION
- Current Assignee: NIDEC SANKYO CORPORATION
- Current Assignee Address: JP Nagano
- Agency: Cantor Colburn LLP
- Priority: JP2017-126242 20170628
- Main IPC: H04B15/00
- IPC: H04B15/00 ; G05B11/42 ; G05B13/02 ; G05B19/042

Abstract:
A servo control device to execute an operation in a discrete time system may include a velocity feedback path having a difference means calculating a pseudo-velocity from a detected position and a lowpass filter, and a PI control means executing a proportional integration control operation on a deviation between the pseudo-velocity and the position deviation to create a drive command for the driver. The velocity feedback path includes a first gain means applying a first gain to the pseudo-velocity, a delay means delaying the pseudo-velocity, and a second gain means applying a second gain to the delayed pseudo-velocity. A sum of an output of the first gain means and the second gain means is inputted to the lowpass filter, and “Fa(z)=1/(1−z−1Fb(z))” is satisfied where a transfer function of the PI control means is Fa(z), and a transfer function of the lowpass filter is Fb(z).
Public/Granted literature
- US20190004482A1 SERVO CONTROL DEVICE, SERVO CONTROL METHOD AND SERVO CONTROL SYSTEM Public/Granted day:2019-01-03
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