Patent US5305158A successfully refreshed from Google Patents.
US5305158A
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US
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Positioning control apparatus
Assignee: Mitsubishi Electric Corp
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Filing: 1991-05-30
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Granted: 1994-04-19
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Expires: 2011-05-30
Abstract
Abstract A positioning control apparatus comprises a feedback compensatory system and a feedforward compensatory system. The feedforward compensatory system comprises a detector for detecting a position of a controlled object whose position is to be controlled, and a compensator connected to the detector. The feedforward compensatory system comprises a first filter having a characteristics reverse to that of the feedback compensatory system, and a second filter having a characteristics reverse to that of the object. A desired drive signal generator supplies the feedforward compensatory system with a desired drive signal having a frequency spectrum having a minimum at the mechanical resonance frequency of the object.
Inventors
- 👤 Takaharu Ueda
- 👤 Shigeki Mizuno
- 👤 Tetsu Yamamoto
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 15:42
CPC Classifications
G; G11; G11B; G11B5/00; G11B5/48; G11B5/54; G11B5/55; G11B5/5521; G11B5/5526; G11B5/553; G11B5/5547
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
141 words
A positioning control apparatus comprising: a feedback compensatory system comprising: detecting means for detecting a position of a controlled object whose position is to be controlled; and a compensator, operably connected to and for controlling said controlled object, connected to an output of the detecting means through a comparator; a feedforward compensatory system, operably connected to said feedback compensatory system, comprising: a first filter means having characteristics reverse to that of the feedback compensatory system; and a second filter means having characteristics reverse to that of the object; and a desired drive signal generating means supplying the feedforward compensatory system with a desired drive signal having a frequency spectrum having a minimum at the mechanical resonance frequency of the controlled object, wherein said detecting means is operably connected to said controlled object and said first and second filters are operably interconnected.
Claim 2
Dependent Claim
141 words
A positioning control apparatus comprising: a feedback compensatory system comprising: detecting means for detecting a position of a controlled object whose position is to be controlled; and a compensator, operably connected to and for controlling said controlled object, connected to an output of the detecting means through a comparator; a feedforward compensatory system, operably connected to said feedback compensatory system, comprising: a first filter means having characteristics reverse to that of the feedback compensatory system; and a second filter means having characteristics reverse to that of the object; and a desired drive signal generating means supplying the feedforward compensatory system with a desired drive signal having a frequency spectrum having a minimum at the mechanical resonance frequency of the controlled object, wherein said detecting means is operably connected to said controlled object and said first and second filters are operably interconnected.
Claim 3
Dependent Claim
36 words
The apparatus of claim 1, wherein said comparator determines the difference between the output of the detecting means and an output of the feedforward compensatory system, said difference determined by said comparator constituting a controlled deviation.
Claim 4
Dependent Claim
23 words
The apparatus of claim 1, wherein said first filter and said second filter of said feedforward compensatory means being cascaded with each other.
Claim 5
Dependent Claim
13 words
The apparatus of claim 1, wherein said desired drive signal represents desired acceleration.
Claim 6
Dependent Claim
28 words
The apparatus of claim 1, wherein said controlled object is an actuator for moving a magnetic head, and said desired drive signal represents desired acceleration during seek operation.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1997-04-18 | 1997-10-18 | 1998-04-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2001-04-18 | 2001-10-18 | 2002-04-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2005-04-18 | 2005-10-18 | 2006-04-19 | $7700.00 | Window Closed / Lapsed |