Chinese Journal of Mechanical Engineering >

2017 , Vol. 30 >Issue 6: 1438 - 1446

DOI: https://doi.org/10.1007/s10033-017-0194-1

ORIGINAL ARTICLE

Asymmetric Fuzzy Control of a Positive and Negative Pneumatic Pressure Servo System

  • Gang Yang ,
  • Jing-Min Du ,
  • Xiao-Yun Fu ,
  • Bao-Ren Li
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  • School of Mechanical Science and Engineering, Huazhong University of Science and Technology, Wuhan 430074, China

收稿日期: 2016-05-11

  修回日期: 2017-10-11

  网络出版日期: 2019-07-16

基金资助

Supported by National Natural Science Foundation of China (Grant No. 51575199).

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Asymmetric Fuzzy Control of a Positive and Negative Pneumatic Pressure Servo System

  • Gang Yang ,
  • Jing-Min Du ,
  • Xiao-Yun Fu ,
  • Bao-Ren Li
Expand
  • School of Mechanical Science and Engineering, Huazhong University of Science and Technology, Wuhan 430074, China

Received date: 2016-05-11

  Revised date: 2017-10-11

  Online published: 2019-07-16

Supported by

Supported by National Natural Science Foundation of China (Grant No. 51575199).

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摘要

The pneumatic pressure control systems have been used in some fields. However, the researches on pneumatic pressure control mainly focus on constant pressure regulation. Poor dynamic characteristics and strong nonlinearity of such systems limit its application in the field of pressure tracking control. In order to meet the demand of generating dynamic pressure signal in the application of the hardware-in-the-loop simulation of aerospace engineering, a positive and negative pneumatic pressure servo system is provided to implement dynamic adjustment of sealed chamber pressure. A mathematical model is established with simulation and experiment being implemented afterwards to discuss the characteristics of the system, which shows serious asymmetry in the process of charging and discharging. Based on the analysis of the system dynamics, a fuzzy proportional integral derivative (PID) controller with asymmetric fuzzy compensator is proposed. Different from conventional adjusting mechanisms employing the error and change in error of the controlled variable as input parameters, the current chamber pressure and charging or discharging state are chosen as inputs of the compensator, which improves adaptability. To verify the effectiveness and performance of the proposed controller, the comparison experiments tracking sinusoidal and square wave commands are conducted. Experimental results show that the proposed controller can obtain better dynamic performance and relatively consistent control performance across the scope of work (2-140 kPa). The research proposes a fuzzy control method to overcome asymmetry and enhance adaptability for the positive and negative pneumatic pressure servo system.

关键词： Pneumatic pressure control system; Positive and negative pressure; Asymmetric control; Fuzzy control

本文引用格式

Gang Yang , Jing-Min Du , Xiao-Yun Fu , Bao-Ren Li . Asymmetric Fuzzy Control of a Positive and Negative Pneumatic Pressure Servo System[J]. Chinese Journal of Mechanical Engineering, 2017 , 30(6) : 1438 -1446 . DOI: 10.1007/s10033-017-0194-1

Abstract

The pneumatic pressure control systems have been used in some fields. However, the researches on pneumatic pressure control mainly focus on constant pressure regulation. Poor dynamic characteristics and strong nonlinearity of such systems limit its application in the field of pressure tracking control. In order to meet the demand of generating dynamic pressure signal in the application of the hardware-in-the-loop simulation of aerospace engineering, a positive and negative pneumatic pressure servo system is provided to implement dynamic adjustment of sealed chamber pressure. A mathematical model is established with simulation and experiment being implemented afterwards to discuss the characteristics of the system, which shows serious asymmetry in the process of charging and discharging. Based on the analysis of the system dynamics, a fuzzy proportional integral derivative (PID) controller with asymmetric fuzzy compensator is proposed. Different from conventional adjusting mechanisms employing the error and change in error of the controlled variable as input parameters, the current chamber pressure and charging or discharging state are chosen as inputs of the compensator, which improves adaptability. To verify the effectiveness and performance of the proposed controller, the comparison experiments tracking sinusoidal and square wave commands are conducted. Experimental results show that the proposed controller can obtain better dynamic performance and relatively consistent control performance across the scope of work (2-140 kPa). The research proposes a fuzzy control method to overcome asymmetry and enhance adaptability for the positive and negative pneumatic pressure servo system.

Key words： Pneumatic pressure control system; Positive and negative pressure; Asymmetric control; Fuzzy control

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