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Research Papers

Determination of Flow Rate Characteristics for Pneumatic Components During Isothermal Discharge by Integral Algorithm

[+] Author and Article Information
Tao Wang1

 School of Automation,  Beijing Institute of Technology, Beijing 100081, Chinawangtaobit@bit.edu.cn

Ling Zhao

Hebei Province Key Laboratory of Heavy Machinery Fluid Power Transmission and Control,  College of Mechanical Engineering, Yanshan University, Qinhuangdao 066004, Chinazhaoling84@gmail.com

Tong Zhao

School of Automation,  Beijing Institute of Technology, Beijing 100081, Chinazhaotong@smc.com.cn

Wei Fan

School of Automation,  Beijing Institute of Technology, Beijing 100081, Chinafanwei@bit.edu.cn

Toshiharu Kagawa

Precision and Intelligence Laboratory,  Tokyo Institute of Technology, Yokohama 226-8503, Japankagawa.t.aa@m.titech.ac.jp

1

Corresponding author.

J. Dyn. Sys., Meas., Control 134(6), 061005 (Sep 13, 2012) (8 pages) doi:10.1115/1.4006623 History: Received June 16, 2010; Accepted April 04, 2012; Published September 13, 2012; Online September 13, 2012

In this paper, we proposed a method to determine the flow rate characteristic parameters directly by using an integral algorithm which is not needed to calculate the flow rate. In the isothermal discharge method discussed by ISO, the flow rate characteristics of pneumatic components can be obtained by pressure response and flow rate. The pressure response is measured in an isothermal tank and the flow rate can be given by differentiating the measured pressure response. Because of using the differential algorithm, calculation precision for measurement error and distribution is much poorer. By integrating pressure experimental result with least error method, characteristics can be obtained easily with Excel tool. Some experimental results are given to show that the proposed calculation method in this paper is more effective than the conversational method by using pressure sensors with different precision.

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Copyright © 2012 by American Society of Mechanical Engineers
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Figures

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Figure 1

(a) Experimental apparatus of isothermal discharge method. (b) Measurement system using isothermal tank.

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Figure 2

Data selection schematic diagram for flow rate characteristics calculation

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Figure 3

Programming solution of C by using solver tool in Microsoft Excel

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Figure 4

Schematic diagram for p(z)

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Figure 5

Isothermal tank stuffed with copper wire

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Figure 6

Pressure and temperature response when stopping discharge

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Figure 7

Pressure and temperature in the isothermal tank 1 during discharge

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Figure 8

Pressure and temperature in the isothermal tank 2 during discharge

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Figure 9

Experimental apparatus of ISO Exhaust-to-atmosphere method

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Figure 10

Pressure response with tank 1

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Figure 11

Pressure response with tank 2

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Figure 12

Flow rate characteristics of solenoid valve using isothermal tank 1

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Figure 13

Flow rate characteristics of solenoid valve using isothermal tank 2

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