Title:
POSITION CONTROL METHOD FOR MOTOR
Document Type and Number:
Japanese Patent JPH0588752
Kind Code:
A
Abstract:
PURPOSE:To shorten the adjusting time and to improve the stopping accuracy for the position control of a motor by adding the velocity reached a prescribed level to a position signal when the inverse number of the time interval of the encoder output pulses is used as the motor velocity. CONSTITUTION:A position command SA, the position deviation SB, a control output signal (current command) SC, a position pulse signal Sd and a velocity signal (inverse number of pulse interval time) Se are used. Meanwhile an integration term 16 is provided together with a proportion item 17, a differentiation term 18, and a software switch 19. The switch 19 is turned on when the motor velocity reaches a prescribed level, and a control output signal is calculated. That is, the switch 19 is turned on when the motor velocity reaches a prescribed level and then the signal Se is added to the position signal SA. The control output is calculated in such a manner so that the influence of the quantization noise caused by the position signal can be reduced. Thus it is possible to secure the control output with high accuracy by making use of the low quantization noise characteristic of a speed reduction signal obtained in a low speed area by a time interval method.
Inventors:
NAKADA HIROYUKI
INOUE HIROYUKI
INOUE HIROYUKI
Application Number:
JP24879291A
Publication Date:
April 09, 1993
Filing Date:
September 27, 1991
Export Citation:
Assignee:
MATSUSHITA ELECTRIC IND CO LTD
International Classes:
G05D3/00; G05D3/12; (IPC1-7): G05D3/00; G05D3/12
Attorney, Agent or Firm:
Akira Kobiji (2 outside)
Next Patent: JPS588753