科氏质量流量计驱动系统模糊PI控制方法  

A fuzzy-PI control method for driving system of Coriolis mass flowmeter

作　　者：黄世震[1] 欧阳峰[1] 

机构地区：[1]福州大学福建省微电子集成电路重点实验室,福建福州350002

出　　处：《太赫兹科学与电子信息学报》2014年第1期127-131,共5页Journal of Terahertz Science and Electronic Information Technology

摘　　要：科氏质量流量计的工作原理建立在振动的基础上,良好的流量管振动控制是产生精确测量数据的前提。传统的模拟控制方法增益有限,动态响应慢,导致流量管振动不稳定甚至停振。为改善对测量管振幅的控制,本文采用模糊比例积分(PI)控制方法,并根据牛津大学对两相流进行试验得到的数据,模拟在两相流发生过程中阻尼比的变化规律,在Simulink中建立驱动系统仿真模型,并与传统的PI控制方法进行比较。结果显示,采用模糊PI控制方法能使流量管响应速度更快,且振动幅值更稳定。Coriolis mass flowmeter is built on the basis of vibration, so that better flow-tube vibration control is the premise of accurate measurement data. The limited gain and slow dynamic response of the traditional methods lead to unstable vibration or even stopped. In order to improve the amplitude control, a fuzzy-Proportional Integral（PI） control method is presented, and according to two-phase flow experimental data from Oxford University, the damping change pattern is simulated to reflect the process of two-phase flow. The driving system simulation model is established in Simulink and is compared with the traditional PI control methods, which demonstrates that the proposed method can obtain faster response speed, and more stable vibration amplitude.

关 键 词：科氏质量流量计 模糊比例积分控制 幅值控制 批料流 两相流 

分 类 号：TP273[自动化与计算机技术—检测技术与自动化装置] TH814[自动化与计算机技术—控制科学与工程]