JPS55115102A - Control unit - Google Patents
Control unitInfo
- Publication number
- JPS55115102A JPS55115102A JP2126579A JP2126579A JPS55115102A JP S55115102 A JPS55115102 A JP S55115102A JP 2126579 A JP2126579 A JP 2126579A JP 2126579 A JP2126579 A JP 2126579A JP S55115102 A JPS55115102 A JP S55115102A
- Authority
- JP
- Japan
- Prior art keywords
- control
- gain
- oscillation
- increase
- closed loop
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Landscapes
- Feedback Control In General (AREA)
- Optical Recording Or Reproduction (AREA)
Abstract
PURPOSE: To make easy the adjustment and maintenance and to increase the reliability, by always detecting the symptom of oscillation in a closed loop control to enable to set optimum control gain automatically at all times.
CONSTITUTION: In performing gain control automation for a closed loop control unit, the state of the controlled object 17 is changed for control in response to the output of the gain variable amplifier 18 taking the control signal as the input signal. At the output side of the differential amplifier 15, the oscillation of frequency around the O dB gain is superimposed to the open loop characteristics of the control system. This phenomenon of oscillation is detected by HPF20 and the comparator 21 is fed to be in operating state with a given level or more to reset the FF22 with the detected pulse C. Thus, the up and down counter 24 performs subtraction to lower the control input voltage of the amplifier 18 and to stop the oscillation of the closed loop. FF22 is set with the pulse from the oscillator 19 to increase the gain and optimum control gain can automatically be set at all times to make easy the adjustment and maintenance and to increase the reliability.
COPYRIGHT: (C)1980,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2126579A JPS55115102A (en) | 1979-02-23 | 1979-02-23 | Control unit |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2126579A JPS55115102A (en) | 1979-02-23 | 1979-02-23 | Control unit |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS55115102A true JPS55115102A (en) | 1980-09-04 |
Family
ID=12050267
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP2126579A Pending JPS55115102A (en) | 1979-02-23 | 1979-02-23 | Control unit |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS55115102A (en) |
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS57110996U (en) * | 1980-12-26 | 1982-07-09 | ||
JPS61180939A (en) * | 1985-02-05 | 1986-08-13 | Fujitsu Ten Ltd | Tracking control circuit |
JPS6297139A (en) * | 1986-08-29 | 1987-05-06 | Matsushita Electric Ind Co Ltd | Focus servo pull-in device |
JPS63298401A (en) * | 1987-05-28 | 1988-12-06 | Matsushita Electric Ind Co Ltd | Loop gain controller |
JPH02149114U (en) * | 1989-05-19 | 1990-12-19 |
-
1979
- 1979-02-23 JP JP2126579A patent/JPS55115102A/en active Pending
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS57110996U (en) * | 1980-12-26 | 1982-07-09 | ||
JPS61180939A (en) * | 1985-02-05 | 1986-08-13 | Fujitsu Ten Ltd | Tracking control circuit |
JPS6297139A (en) * | 1986-08-29 | 1987-05-06 | Matsushita Electric Ind Co Ltd | Focus servo pull-in device |
JPS63298401A (en) * | 1987-05-28 | 1988-12-06 | Matsushita Electric Ind Co Ltd | Loop gain controller |
JPH02149114U (en) * | 1989-05-19 | 1990-12-19 |
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