A DOUBLE-TANK METHOD FOR THE IDENTIFICATION OF PNEUMATIC VALVES’ FLOW-RATE CHARACTERISTICS
Keywords:
flow rate characteristics, identification precision, identification algorithm, double-tank test circuitAbstract
In this paper, a new isothermal tank test circuit composed of two tanks and a new data-processing algorithm called Cbm method are proposed to measure the flow-rate characteristics of some pneumatic valves. The double-tank circuit is used to test some solenoid valves such as inner pilot solenoid, which the traditional isothermal discharge method can not apply to. And Cbm method changes the identification procedure of multivariable unconstrained optimal algorithm, which evidently improves the identification precision of critical pressure ratio and subsonic index.
Downloads
References
Andersen B. 1967. The Analysis and Design of Pneumatic
Systems. John Wiley and Sons, Inc.
Bates, D. M. and Watts, D. G. 1988. Nonlinear Regression
Analysis and Its Applications. John
Wiley& Sons, Inc.
de las Heras, S. 2001. A new experimental algorithm
for the evaluation of the true sonic conductance of
pneumatic components using the characteristic
unloading time. International Journal of Fluid
Power. Vol 2, No 1, pp. 17 - 24.
International Organization for Standardization.
Pneumatic fluid power-components using
compressible fluids-determination of flow-rate
characteristics (ISO6358). S Switzerland.
International Organization for Standardization.
Pneumatic fluid power - Determination of
flow-rate characteristics of components using compressible
fluids - Part 3: Discharge test as alternate
test methods. (ISO/DIS 6358-3).
Kawashima, K., Ishii, Y., Funaki, T. and Kagawa.
Determination of flow rate characteristics of
pneumatic solenoid valves using an isothermal
chamber. Transactions ASME, Fluids Eng. Vol.
, pp. 273 - 279.
Kuroshita, K., Sekiguchi, Y., Osiki, K. and Oneyama,
N. 2004. Development of new test method
for flow rate characteristics of pneumatic components.
Bath Workshop on power transmission and
Motion Control.
Lihong, Y., Chengliang, L. and Xuanfang, Z. 2008.
Effects of polytrophic exponent on data processing
methods used in constant volume discharge. Chinese
journal of mechanical engineering, Vol.21,
No.1, pp: 53 - 56
Montague, R. and Watton, J. 2005. Analysis and
automated testing of a miniature pneumatic valve
for hospital patient support equipment. International
Journal of Fluid Power, Vol 6, No 2, pp. 57 -
Qian, Y. and Xiang, M. G. 2008. Identification of the
flow-rate characteristic of a pneumatic valve by the
instantaneous polytrophic exponent. Measurement
Science and Technology, Vol.19.057002.
Sanville, F. E. 1971. A new method of specifying the
flow capacity of pneumatic fluid power valves. Hydraulic
Pneumatic Power, Vol. 3, pp.120 - 126.
