Research on Gas Flux Control of Micro/Miniature Fuel Cells Testing System

Cheng-Bai WU

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Research on Gas Flux Control of Micro/Miniature Fuel Cells Testing System

Article | 更新时间：2020-08-12

- Research on Gas Flux Control of Micro/Miniature Fuel Cells Testing System
- Optics and Precision Engineering Vol. 16, Issue 3, Pages: 459-466(2008)
- 作者机构：
  
  辽宁省大连理工大学机械学院微系统中心
- 作者简介：
- 基金信息：
- DOI：
  CLC：
- Received：29 September 2007，
  
  Revised：05 November 2007，
  
  Published Online：22 March 2008，
  
  Published：22 March 2008
- 稿件说明：
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吴成百. 微小型燃料电池测试系统气体流量控制研究[J]. 光学精密工程, 2008,16(3):459-466

Cheng-Bai WU. Research on Gas Flux Control of Micro/Miniature Fuel Cells Testing System[J]. Optics and precision engineering, 2008, 16(3): 459-466.
吴成百. 微小型燃料电池测试系统气体流量控制研究[J]. 光学精密工程, 2008,16(3):459-466 DOI：

Cheng-Bai WU. Research on Gas Flux Control of Micro/Miniature Fuel Cells Testing System[J]. Optics and precision engineering, 2008, 16(3): 459-466. DOI：

摘要

根据微小型直接甲醇燃料电池(DMFC)的测试需求，使用工控机、多功能数据采集卡、比例流量阀、数字流量计等组件，搭建了燃料电池气体流量控制子系统。使用LabVIEW软件编写了上位机控制程序，应用改进的自适应PID控制算法，实现气体流量的精确、稳定控制和对实验数据的实时处理。研究了流体伺服系统的组成和设计方法，构建了气体流量伺服控制系统。根据压控恒流源的工作原理，设计并制作了比例流量阀驱动器。针对驱动器的硬件特性，改进了自适应PID控制算法，并在LabVIEW环境下实现了该算法。使用改进后的PID控制算法并结合PID参数的调节，使气体流量伺服控制系统的稳态精度达到了±0.1L/min。系统流量阶跃输入分别为0-5L/min、0-10L/min、0-20L/min、0-50L/min时，上升时间分别为0.9S、4.9S、5.2S、6.6S，超调量均≤0.23L/min，满足了设计要求。

Abstract

Based on the requirement of Direct Methanol Fuel Cell testing

the subsystem of gas flux control was established with the subassemblies composed of multiplied function data collection board

industry control computer

proportional flux solenoid valve，and digital display flowmeter. The control programme was made with LabVIEW

including the improved autotuning PID algorithm. The accuracy of gas flux control for Micro/Miniature Fuel Cells Testing System was improved

and data record and display were realized during the experimental process. The structure and design method of gas flux servo control system were investigated. The driver of proportional flux solenoid valve was designed and fabricated according to the principle of the voltage controlled constant-current source. Based on the character of the driver

the autotuning PID algorithm was improved and realized under the environment of LabVIEW. With the adjustable PID parameters

the steady state accuracy of gas flux control was improved

which is up to ±0.1L/min. The rise time of step response for 0-5L/min

0-10L/min

0-20L/min

and 0-50L/min is 0.9S

4.9S

5.2S

and 6.6S

respectively

and the overshoot is less than 0.23L/min

which is acceptable.

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