科氏质量流量计驱动系统模糊PI控制方法

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。

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

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.