0
TECHNICAL BRIEFS

Control Design for Relative Stability in a PWM-Controlled Pneumatic System

[+] Author and Article Information
Eric J. Barth, Jianlong Zhang, Michael Goldfarb

Department of Mechanical Engineering, Vanderbilt University, Nashville, TN 37235

J. Dyn. Sys., Meas., Control 125(3), 504-508 (Sep 18, 2003) (5 pages) doi:10.1115/1.1591810 History: Received June 17, 2002; Revised December 27, 2002; Online September 18, 2003
Copyright © 2003 by ASME
Your Session has timed out. Please sign back in to continue.

References

Figures

Grahic Jump Location
Schematic diagram of a pneumatic inertial positioning system actuated with a double-acting pneumatic cylinder and controlled with two binary (2-position) 3-way pilot-assisted solenoid valves.
Grahic Jump Location
Open-loop frequency response plots of the equivalent model G(s). Parameters used are those for the particular application of interest with M=10 kg,τ=9 ms,TD=19 ms,P=586 kPa gage (85 psig) and T=38.5 ms (26 Hz PWM switching frequency).
Grahic Jump Location
Frequency response plots of the compensator K(s) obeying the saturation gain limit of −52 dB imposed by PWM control near the targeted cross-over frequency of 2 Hz.
Grahic Jump Location
Frequency response plots of the uncompensated open-loop system, the compensator, and the compensated open-loop system. The compensated open-loop response shows a phase margin of 33° and a gain margin of 6.7 dB at a cross-over frequency of 2.0 Hz.
Grahic Jump Location
Step response. The filtered commanded step is shown as dashed and the measured system response is shown as solid.
Grahic Jump Location
Sinusoidal response at 0.5 Hz. .
Grahic Jump Location
Sinusoidal response at 1.0 Hz. .
Grahic Jump Location
Frequency response plots of the closed-loop system. The figure shows both the control design model prediction as well as experimentally measured points overlayed.

Tables

Errata

Discussions

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