Technical Briefs

Force Tracking of Pneumatic Servo Systems Using On/Off Solenoid Valves Based on a Greedy Control Scheme

[+] Author and Article Information
Minh Quyen Le1

Minh Tu Pham, Richard Moreau, Jean Pierre Simon, Tanneguy Redarce

 Laboratoire Ampère, UMR CNRS 5005, Université de Lyon, INSA-Lyon, F-69621 Villeurbanne Cedex, France


Corresponding author.

J. Dyn. Sys., Meas., Control 133(5), 054505 (Aug 05, 2011) (6 pages) doi:10.1115/1.4004055 History: Received May 10, 2010; Accepted February 10, 2011; Published August 05, 2011; Online August 05, 2011

This paper presents a new predictive greedy control law for the control of electropneumatic systems using solenoid valves. The method is based on a predictive model of the mass flow rate of the valves. For this strategy, a control vector, depending on the number of possible configurations for the solenoid valves, is defined. In order to evaluate the new approach, a comparison has been performed with a classical PWM control for a force tracking problem. The experimental results show that not only the accuracy in steady state but also the dynamic behavior of the pressures is better in the case of greedy control than PWM control.

Copyright © 2011 by American Society of Mechanical Engineers
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Figure 1

Electropneumatic force control system with four on/off valves

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Figure 2

Principle of greedy control

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Figure 3

Block diagram of the greedy control

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Figure 4

Square wave tracking for force control

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Figure 5

Behavior of the state variables in plan (Pp , Pn )

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Figure 6

Evolution of the control value in greedy algorithm

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Figure 7

Pressures in chamber p as a function of time



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