Intelligent Control for Pneumatic Servo System

A special issue of Actuators (ISSN 2076-0825). This special issue belongs to the section "Control Systems".

Deadline for manuscript submissions: closed (30 April 2025) | Viewed by 828

Special Issue Editors


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Guest Editor
Graduate School of Science and Engineering, Ehime University, Matsuyama, Japan
Interests: intelligent control; welfare engineering; man-machine interface

E-Mail Website
Guest Editor
Graduate School of Science and Engineering, Ehime University, Matsuyama, Japan
Interests: control engineering; evolutionary optimization theory; soft computing

Special Issue Information

Dear Colleagues,

Pneumatic actuators are widely used in practical applications because they are small, have a relatively large output which can be easily obtained, and they are inexpensive and easy to use. Its applications are expanding from conventional simple work to fields requiring more advanced control. Along with this, several control methods have been applied to improve the control performance of pneumatic servo systems. However, the pneumatic servo system inherently includes parameter fluctuation characteristics and nonlinearity, such as low stiffness characteristics due to air compressibility, pressure response delay due to control valves, and friction of cylinder sliding parts. Therefore, it is difficult to achieve high-precision positioning control and speed control with conventional linear control methods. In order to obtain the desired control performance for such a control system, it is necessary to add parameter optimization functions to the conventional linear control method, integrate methods to compensate for nonlinearity, or use several AI techniques with nonlinear compensation capabilities. The present Special Issue features papers which provide research approaches on intelligent pneumatic servo control methods with adaptive, optimal, learning, and nonlinearity compensating functions that can mitigate the adverse effects of parameter fluctuation characteristics and nonlinearity on control.

Prof. Dr. Satoru Shibata
Dr. Shenglin Mu
Guest Editors

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Keywords

  • pneumatic servo system
  • intelligent control
  • adaptation to parameter fluctuation
  • compensation of nonlinearity
  • high-precision positioning control

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Published Papers (1 paper)

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Research

20 pages, 2524 KiB  
Article
Adaptive Nonlinear Friction Compensation for Pneumatically Driven Follower in Force-Projecting Bilateral Control
by Daisuke Haraguchi and Yuki Monden
Actuators 2025, 14(3), 151; https://doi.org/10.3390/act14030151 - 18 Mar 2025
Viewed by 196
Abstract
Force-projecting bilateral control is an effective method for enhancing the positioning rigidity and stability of teleoperation systems equipped with compliant pneumatically driven followers. However, friction in the pneumatic actuation mechanism has caused a deterioration in force reproducibility between the leader and follower. To [...] Read more.
Force-projecting bilateral control is an effective method for enhancing the positioning rigidity and stability of teleoperation systems equipped with compliant pneumatically driven followers. However, friction in the pneumatic actuation mechanism has caused a deterioration in force reproducibility between the leader and follower. To solve this problem, this study proposes a practical method of nonlinear friction compensation in force-projecting bilateral control to improve the force reproducibility. The proposed method generates two friction compensation forces: one based on the target admittance velocity from the leader and the other based on the actual velocity of the follower. These forces are seamlessly switched according to the dynamic state of the system to compensate for the follower’s driving force. This enables improved force reproducibility in any motion states of the system while maintaining the advantage of force-projecting bilateral control, which eliminates the need for external force measurement on the follower side. Experiments were conducted using a 1-DOF bilateral control device consisting of an electric linear motor and a pneumatic cylinder, including free motion and contact operations with two types of environments, demonstrating the effectiveness of the proposed method. Full article
(This article belongs to the Special Issue Intelligent Control for Pneumatic Servo System)
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