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Research on a hierarchical air balancing control method of variable air volume ventilation system

机译:可变风量通风系统的分层空气平衡控制方法研究

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摘要

This paper proposes a hierarchical air balancing control method for the ventilation system, which implements a dual loop PID control loop on a layered system structure. A set of fan-duct PID design methods are proposed, which can be programmed to realize automatic design in microcomputer, including determining the transfer function as a first-order plus time delay model, open-loop characteristic test with two points method and self estimation of PI parameter. The negative open proportional characteristic of the damper is discovered. Based on this fact, the first-order plus time delay mode is used to build the damper transfer function too, and the same estimation method of fan-duct is adopted to estimate the PI parameter. A two-step action way of angle adjustment is presented to avoid the mechanical error and achieve better response characteristics while implementing the damper PID control. The experiments demonstrate that the proposed air balancing method is correct and effective and has the ability to achieve control objectives. Moreover, this method has good adaptability and can be applied to different VAV ventilation system to realize variable air volume control.
机译:本文提出了一种用于通风系统的分层空气平衡控制方法,它在层状系统结构上实现了双循环PID控制环路。一组风扇管道PID设计方法提出,其可以被编程以实现在微型计算机自动设计,包括确定的传递函数为具有两个点的方法和自我估计的一阶加纯滞后模型,开环特性试验PI参数。发现了阻尼器的负开放比例特性。基于这一事实,使用一阶加上时间延迟模式来构建阻尼器传递函数,采用相同的风扇管道估计方法来估计PI参数。提出了一种角度调整的两步动作方式,以避免机械误差并在实现阻尼器PID控制的同时实现更好的响应特性。实验表明,所提出的空气平衡方法是正确的,有效的并且具有实现控制目标的能力。此外,该方法具有良好的适应性,并且可以应用于不同的VAV通风系统以实现可变风量控制。

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