JPS56109901A - Hydraulic control system - Google Patents
Hydraulic control systemInfo
- 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
Links
Landscapes
- Servomotors (AREA)
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
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)
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 |
-
1980
- 1980-01-29 JP JP896280A patent/JPS56109901A/en active Pending
Cited By (2)
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 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
CA2180871A1 (en) | Device and method for controlling attachment of construction machine | |
ES8609063A1 (en) | Clutch engagement control system. | |
EP0670426A4 (en) | Circuit capable of varying pump discharge volume in closed center-load sensing system. | |
JPS6444340A (en) | Method of controlling clutch pressure in continuously variable transmission | |
AU566164B2 (en) | Proportional fluid-pressure control valve | |
JPS57200703A (en) | Liquid pressure apparatus | |
JPS56109901A (en) | Hydraulic control system | |
EP0908365A3 (en) | Method of controlling fluid pressure | |
JPS57110731A (en) | Method of controlling time for jetting of distribution type fuel jet pump | |
MY112404A (en) | Numerical control method and apparatus for controlling acceleration and deceleration of a controlled object | |
JPS6434205A (en) | Reaping control device for combine | |
GB2013808A (en) | Anti-skid braking systems | |
JPS562268A (en) | Hydraulic brake gear of agricultural vehicle | |
JPS6055402A (en) | Electrohydraulic operator for regulation valve continuously movable for adjustment | |
JPS57184748A (en) | Apparatus for controlling hydraulic system | |
JPS6460464A (en) | Hydraulic pressure control device for braking device | |
EP0276056A3 (en) | Valve arrangement for a fluid flow control system | |
JPS5652542A (en) | Constant speed travelling device for vehicle | |
JPS571879A (en) | Solenoid valve | |
JPS6412108A (en) | Electronic control device for flow control valve | |
JPH0447164B2 (en) | ||
JPS57144377A (en) | Control valve | |
JPS5981711A (en) | Electric-hydraulic servo device | |
JPS6416412A (en) | Attitude orientation control device for vehicle | |
JPS56138502A (en) | Oil pressure servo driving device |