JPS5789108A - Method and device for fault detection of servo system - Google Patents

Method and device for fault detection of servo system

Info

Publication number
JPS5789108A
JPS5789108A JP16534780A JP16534780A JPS5789108A JP S5789108 A JPS5789108 A JP S5789108A JP 16534780 A JP16534780 A JP 16534780A JP 16534780 A JP16534780 A JP 16534780A JP S5789108 A JPS5789108 A JP S5789108A
Authority
JP
Japan
Prior art keywords
value
signal
servo system
fault
controls
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
JP16534780A
Other languages
Japanese (ja)
Inventor
Takeshi Hanada
Shigenori Takeyoshi
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 Sanki Engineering Co Ltd
Hitachi Ltd
Hitachi Plant Technologies Ltd
Original Assignee
Hitachi Sanki Engineering Co Ltd
Hitachi Techno Engineering Co Ltd
Hitachi 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 Sanki Engineering Co Ltd, Hitachi Techno Engineering Co Ltd, Hitachi Ltd filed Critical Hitachi Sanki Engineering Co Ltd
Priority to JP16534780A priority Critical patent/JPS5789108A/en
Publication of JPS5789108A publication Critical patent/JPS5789108A/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
    • G05B9/00—Safety arrangements
    • G05B9/02—Safety arrangements electric
    • 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
    • G05B2219/00—Program-control systems
    • G05B2219/30—Nc systems
    • G05B2219/42—Servomotor, servo controller kind till VSS
    • G05B2219/42306—Excess in error, compare reference with feedback

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Automation & Control Theory (AREA)
  • Numerical Control (AREA)

Abstract

PURPOSE:To detect a fault with probability even in case when a command value is consecutively given, by calculating the absolute value of the deviation between the command value and the feedback value and deciding the fault of a servo system from the result of the above-mentioned calculation. CONSTITUTION:The command value (a) is applied from a command means 1 in the form of the level of the DC voltage. While the position displacement of a control subject 2 is detected by a detecting means 3 to obtain a DC signal (b) in accordance with the position displacement. The deviation value (c) between the value (a) and the signal (b) is obtained through an arithmetic part 4. Then a servo amplifier 5 controls a hydraulic servo valve 6 with the signal (b). The valve 6 controls the oil flow rate (e) to be supplied to a hydraulic cylinder 8 and then controls the position displacement (c) of the control subject. The absolute value of the deviation signal (c) is monitored by a servo system fault detection element 9. When a fault is detected for the servo system, a signal (f) is transmitted to immediately stop the operation of a hydraulic source 7.
JP16534780A 1980-11-26 1980-11-26 Method and device for fault detection of servo system Pending JPS5789108A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP16534780A JPS5789108A (en) 1980-11-26 1980-11-26 Method and device for fault detection of servo system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP16534780A JPS5789108A (en) 1980-11-26 1980-11-26 Method and device for fault detection of servo system

Publications (1)

Publication Number Publication Date
JPS5789108A true JPS5789108A (en) 1982-06-03

Family

ID=15810616

Family Applications (1)

Application Number Title Priority Date Filing Date
JP16534780A Pending JPS5789108A (en) 1980-11-26 1980-11-26 Method and device for fault detection of servo system

Country Status (1)

Country Link
JP (1) JPS5789108A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0455201A2 (en) * 1990-05-02 1991-11-06 Idemitsu Kosan Company Limited Apparatus for and method of detecting a malfunction of a controller

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0455201A2 (en) * 1990-05-02 1991-11-06 Idemitsu Kosan Company Limited Apparatus for and method of detecting a malfunction of a controller

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