NDLI: Variable speed control of hydraulically driven weight stacks in a 540 kN force standard machine

Content Provider	IEEE Xplore Digital Library
Author	Hayashi, T. Katase, Y. Maejima, H. Yamaguchi, Y. Ueda, K.
Copyright Year	2010
Description	Author affiliation: Mass and Force Standards Section, Mechanical Metrology Division, National Metrology Institute of Japan (ΝΜΠ), AIST, Tsukuba, Japan (Hayashi, T.; Katase, Y.; Maejima, H.; Yamaguchi, Y.; Ueda, K.)
Abstract	In order to expedite calibrations of force measuring instruments, variable speed control of linkage-weight stacks has been newly introduced to the 540 kN dead-weight type force standard machine (DWM) of the National Metrology Institute of Japan. In contrast with actuators driven by AC servo motors which are adopted in DWMs of relatively small capacities, the hydraulic actuator required more gradual control of the weight moving speed to prevent weight oscillation that will deteriorate calibration quality. Use of a non-contact gap sensor also solved the problems of detecting contact and release between the loading frame, the first weight, and the supporting frame and providing a reference for changing the weight speed. The benefits of introducing variable speed control have been verified by experiment.
Starting Page	3165
Ending Page	3168
File Size	152961
Page Count	4
File Format	PDF
ISBN	9781424476428
e-ISBN	9784907764364
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2010-08-18
Publisher Place	Taiwan
Access Restriction	Subscribed
Rights Holder	SICE
Subject Keyword	Calibration Force Velocity control Loading Transducers Valves Instruments DWM Weight oscillation speed controller hydraulic piston-cylinder linkage-weight
Content Type	Text
Resource Type	Article

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