Title:
FEEDBACK CONTROLLER AND FEEDBACK CONTROL METHOD AND MAGNETIC DISK DEVICE AND METHOD FOR CONTROLLING THE SAME
Document Type and Number:
Japanese Patent JP3962527
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To provide a control system capable of being applied to a magnetic disk device, and improving positioning precision under low sampling frequencies.
SOLUTION: A feedback controller is provided with a feedback controller (13) for sampling a difference signal between a target value (11) and an output value (18) outputted from an object (17) to be controlled by sampling frequencies, and for generating a control command value in each sampling time, a multi-gain means (14) for dividing one sampling cycle into the combination of plural time zones according to a prescribed time zone division rule, and for applying a gain to each time zone of plural time zones (T1-TN) according to a prescribed gain application rule, a multi-hold means (15) for holding the product of the control command value and the gain applied by the multi-gain means as a fixed value in each time zone of the plural time zones, and for generating a control waveform, and a driving means (16) for adding the control waveform generated by the multi-hold means to the object to be controlled.
Inventors:
Shinji Takakura
Application Number:
JP2000095958A
Publication Date:
August 22, 2007
Filing Date:
March 30, 2000
Export Citation:
Assignee:
Toshiba Corporation
International Classes:
G05B21/02; G11B20/10; G05B11/36; G11B5/596; G11B21/10; (IPC1-7): G05B21/02; G05B11/36; G11B21/10
Domestic Patent References:
| JP7141017A | ||||
| JP2000047701A |
Attorney, Agent or Firm:
Kazuo Sato
Hiroyuki Nagai
Junpei Okada
Masashi Kurose
Hiroyuki Nagai
Junpei Okada
Masashi Kurose