Patent · US Active

Method and apparatus for improving the position accuracy of a servo motor

US7944167B2 · kind B2 · utility

1Cited by
0References
13Claims
0Family size

Assignee

Inventors

Key dates

Filing dateJun 25, 2008
Grant dateMay 17, 2011
Priority date—
Expiry dateDec 1, 2029

Classification

  • Technology area (CPC G)Physics
  • CPC primaryG05B13/024
  • WIPO fieldControl
  • WIPO sectorInstruments

Abstract

A method of operating a motor controlled by a closed loop servo control system is provided. The closed loop servo control system employs a digital filter, such as a PID filter, that employs one or more gain coefficients. The method includes temporarily increasing one or more of the gain coefficients by a corresponding first predetermined amount when the motor reaches a coefficient boost motor position that is a predetermined distance before a commanded motor rest position, and decreasing the one or more of the gain coefficients by a corresponding second predetermined amount a predetermined time after the motor reaches the commanded motor rest position.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.