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Development of control quality factor for HVAC control loop performance assessment IMethodology (ASHRAE RP-1587)

机译：HVAC控制回路性能评估的控制质量因素的发展indeTogology（Ashrae RP-1587）

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This article is the second paper from the ASHRAE research project RP-1587, focusing on the methodology of obtaining a control quality factor (CQF). This article presents a development of two CQFs for assessing the heating, ventilation, and air-conditioning (HVAC) control loop performance. Both CQFs are able to detect whether the control loop is able to maintain the setpoint and identify the loop's ability to handle disturbances. In addition, the reversal behaviors are assessed as well. The first CQF (CQF-Harris) is proposed based on the normalized Harris index using the recursive least squares method. This recursive least squares method is selected because of its computational efficiency compared with the maximum likelihood estimation method. The second CQF (CQF-EWMA) is based on the exponentially weighted moving average of the error ratio. The assessment scale of excellent, good, fair, bad, and failed, which indicates the quality of the HVAC control loops, is established as well. The sensitivity analysis for both CQFs is also conducted, and it provides insights on choosing the appropriate parameters to compute such CQFs. Such parameters include the sampling frequency, the length of the moving window, and the variance of the unmeasured disturbance. The field evaluations and tests of the proposed CQFs for simulated control loops and real control loops can be found in the companion paper with the title Development of Control Quality Factor for HVAC Control Loop Performance AssessmentIII: Field Testing and Results (ASHRAE RP-1587).
机译：本文是Ashrae研究项目RP-1587的第二篇论文，重点是获得控制质量因子（CQF）的方法。本文提出了两个CQFS的开发，用于评估加热，通风和空调（HVAC）控制回路性能。两个CQFS都能够检测控制回路是否能够维护设定值并识别循环处理干扰的能力。此外，还评估了逆转行为。基于使用递归最小二乘法的标准化Harris指数提出了第一种CQF（CQF-Harris）。由于其与最大似然估计方法相比，该递归最小二乘法是选择的。第二CQF（CQF-EWMA）基于误差比的指数加权移动平均值。表明HVAC控制循环质量的优异，良好，公平，坏，失败的评估规模也是如此。还进行了两种CQFS的灵敏度分析，并为选择适当参数来计算此类CQFS提供见解。这些参数包括采样频率，移动窗口的长度以及未测量干扰的方差。拟议的模拟控制循环和实际控制环路的现场评估和测试可以在Companion纸上找到，具有HVAC控制回路性能评估的控制质量因子的标题开发：现场测试和结果（Ashrae RP-1587）。

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