JPS57129975A - Electric hydraulic control unit - Google Patents

Electric hydraulic control unit

Info

Publication number
JPS57129975A
JPS57129975A JP1298081A JP1298081A JPS57129975A JP S57129975 A JPS57129975 A JP S57129975A JP 1298081 A JP1298081 A JP 1298081A JP 1298081 A JP1298081 A JP 1298081A JP S57129975 A JPS57129975 A JP S57129975A
Authority
JP
Japan
Prior art keywords
signal
electric
output signal
deltaz
input signal
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
JP1298081A
Other languages
Japanese (ja)
Inventor
Kozo Ono
Yasuo Tanaka
Kunio Kashiwagi
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 JP1298081A priority Critical patent/JPS57129975A/en
Publication of JPS57129975A publication Critical patent/JPS57129975A/en
Pending legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G05—CONTROLLING; REGULATING
    • G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
    • G05B5/00—Anti-hunting arrangements
    • G05B5/01—Anti-hunting arrangements electric

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Automation & Control Theory (AREA)
  • Magnetically Actuated Valves (AREA)

Abstract

PURPOSE:To ensure that whenever the input is O, the blind sector compensation circuit issues the electric output signal O, by having the output O issued whenever the absolute value of the input signal is small enough not to affect the control system characteristics. CONSTITUTION:A specific level DELTAZ is set small enough so that any imput signal within this level does not affect the control system characteristics, and when absolute value of an electric imput signal Z does not exceed the specific level DELTAZ, resultant output signal X becomes O. When absolute value of an electric input signal Z is larger than the specific level DELTAZ and the value is positive, the output signal X becomes the sum of the positive upper limit value of a blind zone + Xo; or, if the input signal Z is negative, the sum of the megative lower limit level>=Xo. For more frequent cases where the electric input signal is O, resultant output signal is always O, and on electric current is supplied to the solenoid of the flow control valve, saving that much electricity.
JP1298081A 1981-02-02 1981-02-02 Electric hydraulic control unit Pending JPS57129975A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP1298081A JPS57129975A (en) 1981-02-02 1981-02-02 Electric hydraulic control unit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP1298081A JPS57129975A (en) 1981-02-02 1981-02-02 Electric hydraulic control unit

Publications (1)

Publication Number Publication Date
JPS57129975A true JPS57129975A (en) 1982-08-12

Family

ID=11820356

Family Applications (1)

Application Number Title Priority Date Filing Date
JP1298081A Pending JPS57129975A (en) 1981-02-02 1981-02-02 Electric hydraulic control unit

Country Status (1)

Country Link
JP (1) JPS57129975A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59185473U (en) * 1983-05-25 1984-12-10 株式会社島津製作所 servo valve
CN102720876A (en) * 2012-05-17 2012-10-10 浙江工业大学 Soft match grinding method for eliminating flow characteristic dead zone of electro-hydraulic servo valve

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59185473U (en) * 1983-05-25 1984-12-10 株式会社島津製作所 servo valve
CN102720876A (en) * 2012-05-17 2012-10-10 浙江工业大学 Soft match grinding method for eliminating flow characteristic dead zone of electro-hydraulic servo valve

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