Research Papers

Performance of Proportional Flow Valve With Pilot Pressure Drop—Spool Opening Compensation

[+] Author and Article Information
Jiahai Huang, Jiangjiao Dai, Yuan Lan

Key Laboratory of Advance Transducers
and Intelligent Control System,
Ministry of Education,
Taiyuan University of Technology,
Taiyuan 030024, China

Long Quan

Key Laboratory of Advance Transducers
and Intelligent Control System,
Ministry of Education,
Taiyuan University of Technology,
Taiyuan 030024, China
e-mail: quanlong@tyut.edu.cn

1Corresponding author.

Contributed by the Dynamic Systems Division of ASME for publication in the JOURNAL OF DYNAMIC SYSTEMS, MEASUREMENT, AND CONTROL. Manuscript received November 9, 2015; final manuscript received August 12, 2016; published online October 17, 2016. Assoc. Editor: Heikki Handroos.

J. Dyn. Sys., Meas., Control 139(1), 011009 (Oct 17, 2016) (8 pages) Paper No: DS-15-1564; doi: 10.1115/1.4034504 History: Received November 09, 2015; Revised August 12, 2016

Flow control valves are extensively used to control the motion of hydraulic actuators in industry. In this paper, a two-stage proportional flow control valve with pilot digital pressure compensator is presented. The proposed valve is composed of two pressure sensors, a proportional pilot valve, a Valvistor poppet valve (main stage), and an electronic controller. The pressure drop across the pilot valve metering orifice is detected by two pressure sensors and fed into the controller which changes the pilot valve input voltage to compensate pressure influence on the outlet flow. The presented valve is investigated theoretically by simplified analytical models as well as numerical methods and also evaluated experimentally. The results show that the proposed scheme is feasible. It has a reasonable static performance and an acceptable dynamic characteristic for low bandwidth disturbances. The flow force on the Valvistor poppet should be estimated and considered in the controller design.

Copyright © 2017 by ASME
Your Session has timed out. Please sign back in to continue.



Grahic Jump Location
Fig. 1

Configuration of the proposed flow control valve

Grahic Jump Location
Fig. 2

Validation of the pilot valve simulation model: (a) dynamic performance and (b) static performance

Grahic Jump Location
Fig. 3

Photo of the proportional flow valve test rig: (1) pilot valve, (2) gear flow meter (0–15 L/min), (3) displacement sensor 4, pressure sensor, (5), and Valvistor valve

Grahic Jump Location
Fig. 4

Calibration of LVDT

Grahic Jump Location
Fig. 5

Relationship among the pi, po, and pc

Grahic Jump Location
Fig. 6

Step response of the main stage displacement

Grahic Jump Location
Fig. 7

Steady performance of main stage displacement

Grahic Jump Location
Fig. 8

Dynamic response of proposed valve with compensation

Grahic Jump Location
Fig. 9

Comparison of the numerical results and tested results under steady condition: (a) Qt versus Δpm and (b) xm versus Δpm

Grahic Jump Location
Fig. 10

Steady control performance (simulation model): (a) xm versus Ui and (b) Qt versus Ui

Grahic Jump Location
Fig. 11

Steady load characteristics (simulation model): (a) performance with pilot compensation scheme and (b) performance without pilot compensation scheme

Grahic Jump Location
Fig. 12

Dynamic response of the step input signal at constant pi and △pm

Grahic Jump Location
Fig. 13

Simulation result of dynamic performance

Grahic Jump Location
Fig. 14

Simulation result of frequency response




Some tools below are only available to our subscribers or users with an online account.

Related Content

Customize your page view by dragging and repositioning the boxes below.

Related Journal Articles
Related eBook Content
Topic Collections

Sorry! You do not have access to this content. For assistance or to subscribe, please contact us:

  • TELEPHONE: 1-800-843-2763 (Toll-free in the USA)
  • EMAIL: asmedigitalcollection@asme.org
Sign In