Title:
SERVO CONTROLLER AND SERVO CONTROLLING METHOD
Document Type and Number:
Japanese Patent JP3773686
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To provide a servo controller and method for accurately and quickly estimating disturbance, and for accurately realizing servo control even at the time of suppressing disturbance and feedback controlling an object to be controlled by inexpensively and easily constituting a servo control system by using an observer whose constitution is simple.
SOLUTION: This servo controller is provided with an observer 5b for estimating disturbance to be impressed from the outside part to an object to be controlled in a spring system such as a focus actuator, and for generating a disturbance estimate, and the disturbance is compensated based on the disturbance estimate, and the object to be controlled is feedback controlled in this servo controller. The observer 5b estimates the disturbance by using an inner model in an inertial system defined by a characteristic equation including only a second-order term as an inner model indicating the object to be controlled in at least a frequency band with the specific oscillation frequencies of the object to be controlled or more.
Inventors:
Kiyoshi Tateishi
Application Number:
JP3905099A
Publication Date:
May 10, 2006
Filing Date:
February 17, 1999
Export Citation:
Assignee:
Pioneer Corporation
International Classes:
G05B13/02; G11B21/10; G05B5/01; G05B11/36; G05B13/04; G05B19/19; G05D3/12; G11B7/09; H02P29/00; (IPC1-7): G05B13/02; G05B11/36; G05D3/12; G11B7/09; G11B21/10; H02P5/00
Domestic Patent References:
| JP9265304A | ||||
| JP52011393B1 |
Attorney, Agent or Firm:
Yasuo Ishikawa