Servo control system having function of switching learning memory

Patent metadata

Field	Value
Publication number	US-9905264-B2
Application number	US-201615194571-A
Country	US
Kind code	B2
Filing date	Jun 28, 2016
Priority date	Jun 30, 2015
Publication date	Feb 27, 2018
Grant date	Feb 27, 2018

Abstract

A servo control system according to the present invention includes a servo control device for driving a driven body that operates periodically using a servomotor; and a learning controller for generating correction data based on a location deviation with respect to a uniform command pattern, and storing the correction data in delay memory and correcting the location deviation. The delay memory includes first memory having a short access delay time and second memory having a long access delay time. The servo control device includes a switching unit for assigning one of the first memory and the second memory to the learning controller, depending on a learning period according to the command pattern.

First claim

What is claimed is:

1. A servo control system comprising:
a servo control device for driving a driven body that operates periodically using a servomotor; and
a learning controller for generating correction data based on a location deviation with respect to a uniform command pattern, and storing the correction data in delay memory and correcting the location deviation,
wherein the delay memory includes a first memory having a short access delay time and a second memory having a long access delay time,
wherein the servo control device includes a switching unit for assigning one of the first memory and the second memory to the learning controller, depending on a learning period according to the command pattern, and
wherein the switching unit is switched such that
when the learning period is longer than the delay time of the second memory, the second memory is selected, and
when the learning period is equal to or shorter than the delay time of the second memory, the first memory is selected.

2. The servo control system according to claim 1 , wherein the first memory is a memory installed in a CPU of the servo control device.

3. The servo control system according to claim 1 , wherein the second memory is a memory provided outside the servo control device.

Assignees

• Fanuc Corp

Inventors

• Kameta Kouki
• Sonoda Naoto

Classifications

• G11B21/10 Primary

  Track finding or aligning by moving the head {; Provisions for maintaining alignment of the head relative to the track during transducing operation, i.e. track following (characterised by the track access method G11B21/08)} · CPC title

• G05B13/0265 Primary

  the criterion being a learning criterion · CPC title

• G05B2219/42151

  Learn dynamics of servomotor system by ann · CPC title

• G05D1/0088

  characterized by the autonomous decision making process, e.g. artificial intelligence, predefined behaviours (using knowledge based models G06N5/00) · CPC title

• G05B19/4141 Primary

  characterised by a controller or microprocessor per axis · CPC title