JPS5576933A - Vibration tester - Google Patents

Vibration tester

Info

Publication number
JPS5576933A
JPS5576933A JP15008478A JP15008478A JPS5576933A JP S5576933 A JPS5576933 A JP S5576933A JP 15008478 A JP15008478 A JP 15008478A JP 15008478 A JP15008478 A JP 15008478A JP S5576933 A JPS5576933 A JP S5576933A
Authority
JP
Japan
Prior art keywords
servo
spool
control system
currents
frequency
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
JP15008478A
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 JP15008478A priority Critical patent/JPS5576933A/en
Publication of JPS5576933A publication Critical patent/JPS5576933A/en
Pending legal-status Critical Current

Links

Landscapes

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

Abstract

PURPOSE: To eliminate adverse effects to a servo-control system due to the resonance of a spool, by controlling servo-valve field currents as well as servo-valve spool drive currents.
CONSTITUTION: Spool displacement signals are amplified by means of a spool displacement amplifier 24 because currents flowing through a spool drive coil 22 are proportional to the displacement of a spool 20, the signals are substracted from field current set value, voltage signals given to a field power source 26 are decreased, and currents afforded to a field coil 23 are lessened. Here, the spool displacement amplifier 24 is furnished with a discriminating function for detecting only frequency not less than upper limit frequency in a frequency region necessary for a servo- control system. Thus, the response sensitivity of a servo-valve in a frequency region except a frequency range required for the servo-control system can be lowered without damaging the phase characteristics of the control system.
COPYRIGHT: (C)1980,JPO&Japio
JP15008478A 1978-12-06 1978-12-06 Vibration tester Pending JPS5576933A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP15008478A JPS5576933A (en) 1978-12-06 1978-12-06 Vibration tester

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP15008478A JPS5576933A (en) 1978-12-06 1978-12-06 Vibration tester

Publications (1)

Publication Number Publication Date
JPS5576933A true JPS5576933A (en) 1980-06-10

Family

ID=15489155

Family Applications (1)

Application Number Title Priority Date Filing Date
JP15008478A Pending JPS5576933A (en) 1978-12-06 1978-12-06 Vibration tester

Country Status (1)

Country Link
JP (1) JPS5576933A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2020187755A1 (en) * 2019-03-18 2020-09-24 Université de Mons Resonant frequency vibrational test

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2020187755A1 (en) * 2019-03-18 2020-09-24 Université de Mons Resonant frequency vibrational test
CN113785180A (en) * 2019-03-18 2021-12-10 蒙斯大学 Resonance frequency vibration test

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