JPS55119709A - Servo mechanism - Google Patents

Servo mechanism

Info

Publication number
JPS55119709A
JPS55119709A JP2666179A JP2666179A JPS55119709A JP S55119709 A JPS55119709 A JP S55119709A JP 2666179 A JP2666179 A JP 2666179A JP 2666179 A JP2666179 A JP 2666179A JP S55119709 A JPS55119709 A JP S55119709A
Authority
JP
Japan
Prior art keywords
solenoids
piston
excited
excitation
constitution
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
JP2666179A
Other languages
Japanese (ja)
Inventor
Kazuo Honma
Yoshio Nakajima
Atsushi Koseki
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.)
Hitachi Construction Machinery Co Ltd
Original Assignee
Hitachi Construction Machinery Co 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 Hitachi Construction Machinery Co Ltd filed Critical Hitachi Construction Machinery Co Ltd
Priority to JP2666179A priority Critical patent/JPS55119709A/en
Publication of JPS55119709A publication Critical patent/JPS55119709A/en
Pending legal-status Critical Current

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B11/00—Servomotor systems without provision for follow-up action; Circuits therefor
    • F15B11/006—Hydraulic "Wheatstone bridge" circuits, i.e. with four nodes, P-A-T-B, and on-off or proportional valves in each link

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Servomotors (AREA)
  • Feedback Control In General (AREA)
  • Control Of Position Or Direction (AREA)

Abstract

PURPOSE: To enable to obtain the control accuracy similar to the quinary ON-OFF set, without changing the constitution of hydraulic circuit of ternary ON-OFF mechanism, by forming the control unit with the comparator, logic element and pulse generation unit.
CONSTITUTION: The control unit is formed with the comparators 12,, 13, 18, 19, AND elements 23W28, OR elements 29, 30 and pulse generator 22. When the control deviation E is greater than Δ, since the solenoids 4a, 5a are excited, the piston is moved right in high speed, and the piston is moved right in low speed since the excitation of the solenoids 4a, 5a and the solenoids 5a, 7a are alternately made at δ<E<Δ. Since the solenoids 5a, 7a are excited at δ>E>-δ, the piston is standstill. Further, at k-δ>E>-Δ, since the excitation of the solenoids 6a, 7a and that of 5a, 7a are alternately made, the piston is moved left in low speed and at E<-Δ, since the solenoids 6a, 7a are excited, the piston is moved left in high speed. Where Δ, δ are set values.
COPYRIGHT: (C)1980,JPO&Japio
JP2666179A 1979-03-09 1979-03-09 Servo mechanism Pending JPS55119709A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2666179A JPS55119709A (en) 1979-03-09 1979-03-09 Servo mechanism

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2666179A JPS55119709A (en) 1979-03-09 1979-03-09 Servo mechanism

Publications (1)

Publication Number Publication Date
JPS55119709A true JPS55119709A (en) 1980-09-13

Family

ID=12199594

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2666179A Pending JPS55119709A (en) 1979-03-09 1979-03-09 Servo mechanism

Country Status (1)

Country Link
JP (1) JPS55119709A (en)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS576103A (en) * 1980-05-12 1982-01-13 Ford Motor Co Electrohydrolic proportional actuator
JPS57129903A (en) * 1981-02-06 1982-08-12 Henriku Gesuta Niisutorem Peru Sebo mechanism
JPS58160601A (en) * 1982-03-18 1983-09-24 Hitachi Constr Mach Co Ltd Electrohydraulic servo mechanism
JPS58180803A (en) * 1982-04-01 1983-10-22 デイ−ア・アンド・カンパニ− Controller for reciprocating hydraulic cylinder device
JPS58193904A (en) * 1982-04-20 1983-11-11 Hitachi Constr Mach Co Ltd Electric-hydraulic servo mechanism
USRE33846E (en) * 1982-04-01 1992-03-17 Deere & Company Electrohydraulic valve system

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS576103A (en) * 1980-05-12 1982-01-13 Ford Motor Co Electrohydrolic proportional actuator
JPS57129903A (en) * 1981-02-06 1982-08-12 Henriku Gesuta Niisutorem Peru Sebo mechanism
JPS58160601A (en) * 1982-03-18 1983-09-24 Hitachi Constr Mach Co Ltd Electrohydraulic servo mechanism
JPS58180803A (en) * 1982-04-01 1983-10-22 デイ−ア・アンド・カンパニ− Controller for reciprocating hydraulic cylinder device
USRE33846E (en) * 1982-04-01 1992-03-17 Deere & Company Electrohydraulic valve system
JPS58193904A (en) * 1982-04-20 1983-11-11 Hitachi Constr Mach Co Ltd Electric-hydraulic servo mechanism
JPS6327562B2 (en) * 1982-04-20 1988-06-03 Hitachi Construction Machinery

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