The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
May. 23, 2006
Filed:
Mar. 26, 2001
Keizo Akamatsu, Fukuoka, JP;
Kazuhiro Tsuruta, Fukuoka, JP;
Keizo Akamatsu, Fukuoka, JP;
Kazuhiro Tsuruta, Fukuoka, JP;
Kabushiki Kaisha Yaskawa Denki, Fukuoka, JP;
Abstract
When a position/speed feedback changes while a control system for driving a feed axis uses an integration gain during a shaft stopping, the control system goes unstable to cause a torque instruction to vibrate or diverge. In addition, only a single, narrow-range feed speed can be accommodated to find an out-of-range speed to be insufficient or excessive in compensation effects. After detecting the movement reversal of a feed axis, a control loop is modeled, a virtual internal model computing unit () using a constant separate from a constant used in a control loop is configured, a virtual torque instruction () computed by this computing unit () is added to a torque instruction () for driving the feed axis, this adding is terminated when the virtual torque instruction () reaches a specified value, and a value () of an integrator in a virtual internal model at the adding termination is added to the integrator () corresponding to a position/speed feedback loop.