Estimation apparatus for control system and method therefor

Patent metadata

Field	Value
Publication number	US-9075403-B2
Application number	US-201213421973-A
Country	US
Kind code	B2
Filing date	Mar 16, 2012
Priority date	Apr 19, 2011
Publication date	Jul 7, 2015
Grant date	Jul 7, 2015

Abstract

The frequency characteristic of a controller is acquired. The gain characteristic and phase characteristic of a controlled system are acquired. The open-loop transfer characteristic of the control system and the variation range of the open-loop transfer characteristic are computed from a variation range of the frequency characteristic of the controlled system and the frequency characteristic of the controller, and the variation range of the frequency characteristic of the controlled system is a region where a variation range of the gain characteristic and a variation range of the phase characteristic overlap in a complex coordinate system. The stability of the control system is estimated from the open-loop transfer characteristic and the variation range of the open-loop transfer characteristic.

First claim

What is claimed is:

1. An estimation apparatus for estimating a control system including a controller and a controlled system, the apparatus comprising:
a first acquisition section configured to acquire a frequency characteristic of the controller;
a second acquisition section configured to acquire a gain characteristic and a phase characteristic of the controlled system;
a computation section configured to compute an open-loop transfer characteristic of the control system and…

Assignees

• Seki Tatsuru
• Canon Kk

Inventors

• Seki Tatsuru

Classifications

• G05B13/02 Primary

  Physics · mapped topic