JPS554516A - Start control unit in vibration testing machine - Google Patents

Start control unit in vibration testing machine

Info

Publication number
JPS554516A
JPS554516A JP7652178A JP7652178A JPS554516A JP S554516 A JPS554516 A JP S554516A JP 7652178 A JP7652178 A JP 7652178A JP 7652178 A JP7652178 A JP 7652178A JP S554516 A JPS554516 A JP S554516A
Authority
JP
Japan
Prior art keywords
adder
output
tested
exciting
signal generator
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
JP7652178A
Other languages
Japanese (ja)
Inventor
Akihisa Kaihara
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 Ltd
Original Assignee
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 Ltd filed Critical Hitachi Ltd
Priority to JP7652178A priority Critical patent/JPS554516A/en
Publication of JPS554516A publication Critical patent/JPS554516A/en
Pending legal-status Critical Current

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  • Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)

Abstract

PURPOSE: To prevent shock upon the object to be tested by so biasing a command signal generator output that the output of an adder to which the displacement signal of an exciting machine is fed back becomes zero.
CONSTITUTION: A bias circuit 17 is connected between an adder 4 which is connected to acceleration detectors 12, 14, integrating circuits 13, 14 and displacement detector 6 and to which the displacement signal of an exciting machine 5 is fed back and a command signal generator 3 as well as between the adder 4 and a servo amplifier 7. In order to excite an exciting table 1 which has lowered down to the lowermost position owing to the weight of the object 2 to be tested and its own weight, a hydraulic cylinder 10 is connected to a hydraulic source 8 and before pressing with this, the command signal generator 3 output is so biased by the bias circuit 17 that the output of the adder 4 becomes zero. Then, when the hydraulic cylinder 10 is pressurized, no acceleration is generated in the exciting table 1 and no unnecessary shock is given to the object 2 to be tested.
COPYRIGHT: (C)1980,JPO&Japio
JP7652178A 1978-06-26 1978-06-26 Start control unit in vibration testing machine Pending JPS554516A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP7652178A JPS554516A (en) 1978-06-26 1978-06-26 Start control unit in vibration testing machine

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP7652178A JPS554516A (en) 1978-06-26 1978-06-26 Start control unit in vibration testing machine

Publications (1)

Publication Number Publication Date
JPS554516A true JPS554516A (en) 1980-01-14

Family

ID=13607577

Family Applications (1)

Application Number Title Priority Date Filing Date
JP7652178A Pending JPS554516A (en) 1978-06-26 1978-06-26 Start control unit in vibration testing machine

Country Status (1)

Country Link
JP (1) JPS554516A (en)

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4934878A (en) * 1972-07-31 1974-03-30
JPS5129419A (en) * 1974-04-03 1976-03-12 Montedison Spa

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4934878A (en) * 1972-07-31 1974-03-30
JPS5129419A (en) * 1974-04-03 1976-03-12 Montedison Spa

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