Motor control apparatus

Patent metadata

Field	Value
Publication number	US-10739734-B2
Application number	US-201916571470-A
Country	US
Kind code	B2
Filing date	Sep 16, 2019
Priority date	Sep 21, 2018
Publication date	Aug 11, 2020
Grant date	Aug 11, 2020

Abstract

A motor control apparatus including a controller that controls a servo motor or a spindle motor and includes a switching determining part that determines a switching condition of the controller based on axis position information on a motor related to control of the motor control apparatus, a machine learning part that adjusts one or more parameters for the controller by machine learning for each switching condition, and a parameter holding part that holds the parameter adjusted by the machine learning part for each switching condition. The switching determining part, when determining the switching condition after adjustment of the parameter, uses the adjusted parameter corresponding to the switching condition in the controller. The apparatus enables changing, and automatic adjustment, of a parameter or controller to be used depending on a switching condition of the parameter related to axis position information or a switching condition of the controller using the parameter.

First claim

What is claimed is:

1. A motor control apparatus comprising a controller configured to control a servo motor or a spindle motor of a machine tool, a robot or an industrial machine, the motor control apparatus comprising:
a switching determining part or first communication means configured to communicate with the switching determining part, the switching determining part configured to determine a switching condition of the controller on a basis of position information on an axis related to control of the motor control apparatus;
a machine learning part or second communication means configured to communicate with the machine learning part, the machine learning part configured to adjust one or more parameter(s) for the controller by machine learning for each of the switching conditions; and
a parameter holding part or third communication means configured to communicate with the parameter holding part, the parameter holding part configured to hold the parameter adjusted by the machine learning part for each of the switching conditions,
wherein the switching determining part, when determining the switching condition after adjustment of the parameter, uses the adjusted parameter corresponding to the switching condition in the controller.

2. The motor control apparatus according to claim 1 , the motor control apparatus comprising:
a position command generating part configured to generate a position command related to the axis;
a position detecting part configured to detect a position related to the axis;
a position controller configured to generate a speed command by use of the position command and feedback information on the position detected by the position detecting part;
a speed detecting part configured to detect a speed; and
a speed controller configured to generate a torque command by use of the speed command generated by the position controller and feedback information on the speed detected by the speed detecting part,
wherein the machine learning part adjusts a parameter for the position controller or the speed controller for each of the switching conditions.

3. The motor control apparatus according to claim 1 , the motor control apparatus comprising:
a speed command generating part configured to generate the speed command;
a speed detecting part configured to detect the speed; and
a speed controller configured to generate a torque command by use of the speed command and feedback information on the speed detected by the speed detecting part,
wherein the machine learning part adjusts a parameter for the speed controller for each of the switching conditions.

4. The motor control apparatus according to claim 1 , the motor control apparatus comprising:
at least either one of a position feedforward controller and a speed feedforward controller, the position feedforward controller configured to generate position feedforward information by use of the position command, the speed feedforward controller configured to generate speed feedforward information by use of the position command,
wherein the machine learning part adjusts one or more parameter(s) for at least either one of the position feedforward controller and the speed feedforward controller for each of the switching conditions.

5. The motor control apparatus according to claim 1 ,
wherein the machine learning part adjusts a plurality of different types of parameters for one of the switching conditions, and
the switching determining part uses one parameter selected from among the plurality of parameters in the controller.

Assignees

• Fanuc Corp

Inventors

• Tsuneki Ryoutarou
• Ikai Satoshi
• Shimoda Takaki

Classifications

• G05B19/4163 Primary

  Adaptive control of feed or cutting velocity (without NC B23Q15/12) · CPC title

• F15B21/087

  Control strategy, e.g. with block diagram · CPC title

• G05B19/19

  characterised by positioning or contouring control systems, e.g. to control position from one programmed point to another or to control movement along a programmed continuous path · CPC title

• G05B2219/36521

  Select by combination of detected force, acceleration, speed, work rate · CPC title

• G05B2219/41021

  Variable gain · CPC title