介绍了ARX模型在暖通空调系统中基于模型的实时诊断中的应用。基于模型的诊断是一种能够根据整个暖通空调系统中包含的单独部件的行为描述和相互连接来发现可能的诊断的技术。最好将其理解为观察和预测的相互作用。一边是实际设备，另一边是模型，可以预测设备的行为。实际观测值与模型预测值之间的显著差异表明受监控设备存在故障。系统的行为是使用ARX模型定义的。整个系统的ARX模型用于检测系统性能下降。在系统模型指示可能的故障后，基于模型的诊断过程将尝试使用系统中存在的单独部件的ARX模型来确定诊断。 故障检测过程和基于模型的诊断过程在可编程实时环境中捕获，该环境控制模型的选择和基于模型的诊断算法的使用。该诊断环境已在可变风量（VAV）系统模拟上进行了测试，数据集包含已知和未知故障。关键词:1997年，计算，供暖，通风，空调，空气处理机组，变风量空调，监测，故障，检测引用:研讨会，ASHRAE Trans。1997年，第103卷，第一部分

Describes the application of ARX models for real-time model-based diagnosis in heating, ventilating, and air conditioning (HVAC) systems. Model-based diagnosis is a technique capable of finding possible diagnoses based on behaviour description and interconnections of the separate components contained in the whole HVAC system. It can best be understood as the interaction of observation and prediction. On one side there is the actual device, on the other side the model, which can make predictions about the behaviour of the device. A significant difference between the actual observations and the model predictions indicates the monitored device has a malfunction. The behaviour of the system is defined using ARX models. An ARX model of the complete system is used to detect a degrading performance of the system. After the system model has indicated a possible malfunction, the model-based diagnostic process will try to determine a diagnosis using the ARX models of the separate components present in the system. The fault detection process and the model-based diagnosis process are captured in a programmable real-time environment that controls the selection of the models and the use of the model-based diagnostic algorithm. This diagnostic environment has been tested on a variable-air-volume (VAV) system simulation with data sets with known and unknown faults.KEYWORDS: year 1997, Calculating, heating, ventilation, air conditioning, air handling units, variable volume air conditioning, monitoring, failure, detecting