JPS56109901A - Hydraulic control system - Google Patents

Hydraulic control system

Info

Publication number
JPS56109901A
JPS56109901A JP896280A JP896280A JPS56109901A JP S56109901 A JPS56109901 A JP S56109901A JP 896280 A JP896280 A JP 896280A JP 896280 A JP896280 A JP 896280A JP S56109901 A JPS56109901 A JP S56109901A
Authority
JP
Japan
Prior art keywords
piston
generates
signal
constitution
displacement
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
Application number
JP896280A
Other languages
Japanese (ja)
Inventor
Tetsuya Nakayama
Toshiaki Horikoshi
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Komatsu Ltd
Original Assignee
Komatsu Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Komatsu Ltd filed Critical Komatsu Ltd
Priority to JP896280A priority Critical patent/JPS56109901A/en
Publication of JPS56109901A publication Critical patent/JPS56109901A/en
Pending legal-status Critical Current

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Abstract

PURPOSE: To prevent the shock at the time of switching in the case the operation of a hydraulic actuator is controlled by the switching of an ON-OFF control valve, by controlling the ON-OFF operation of the control valve at a frequency higher than the natural frequency of the hydraulic actuator.
CONSTITUTION: A setting part 4 generates a signal indicating the target value of the speed, displacement, and the like of a piston 2. A detecting part 5 generates a signal indicating the actually measured value of the speed, displacement, or the like of the piston 2. The deviation signal between the output of the setting part 4 and the output of the detecting part 5 is fed to a pulse width modulating part 6. The pulse width modulating part 6 varies the pulse duty under the constant carrier period based on the received deviation signal, generates a current command signal, and sends it to a current control part 7. The current control part 7 controls the current command signal which is applied to solenoids 8a and 8b of a solenoid controlled valve 8. In this constitution, the solenoid controlled valve 8 changes the direction of the hydraulic pressure applied from a hydraulic pressure source 9, and controls the operation of the piston 2 in the cylinder 1.
COPYRIGHT: (C)1981,JPO&Japio
JP896280A 1980-01-29 1980-01-29 Hydraulic control system Pending JPS56109901A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP896280A JPS56109901A (en) 1980-01-29 1980-01-29 Hydraulic control system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP896280A JPS56109901A (en) 1980-01-29 1980-01-29 Hydraulic control system

Publications (1)

Publication Number Publication Date
JPS56109901A true JPS56109901A (en) 1981-08-31

Family

ID=11707289

Family Applications (1)

Application Number Title Priority Date Filing Date
JP896280A Pending JPS56109901A (en) 1980-01-29 1980-01-29 Hydraulic control system

Country Status (1)

Country Link
JP (1) JPS56109901A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61276004A (en) * 1985-05-31 1986-12-06 Iseki & Co Ltd Flow control device for hydraulic cylinder in automatic control device
JPS6324401U (en) * 1986-07-31 1988-02-18

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61276004A (en) * 1985-05-31 1986-12-06 Iseki & Co Ltd Flow control device for hydraulic cylinder in automatic control device
JPS6324401U (en) * 1986-07-31 1988-02-18

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