智能VAV通风柜PID控制系统的设计

Design of PID Control System for Intelligent VAV Fume Hood

针对传统的通风柜不能对面风速进行精准控制、无法保证实验的安全性等问题,提出了一种智能通风柜控制系统的设计方案,采用变风量控制(VAV)的方法保持通风管道静压恒定,通过PID控制算法自动调节风阀角度,实现通风柜的面风速保持恒定的要求。讨论了通风控制系统的滤波算法,并对PID控制算法进行了数值仿真,最后将仿真数据应用于通风系统的调试中,取得平稳的运行效果。

Aiming at the problems that the traditional fume hood can not accurately control the wind speed and can not ensure the safety of the experiment,a design scheme of intelligent fume hood control system is proposed in this paper.The variable air volume control(VAV)method is used to keep the static pressure of the ventilation duct constant,and the Angle of the air valve is automatically adjusted by PID control algorithm to achieve the requirement of keeping the surface wind speed constant.The filtering algorithm of the ventilation system is discussed,and the PID control algorithm is simulated NUMERICALLY.Finally,the simulation data are applied to the debugging of ventilation system.