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为了能有效诊断暖通空调系统（ＨＶＡＣ）中可能出现的故障，保证暖通空调系统安全、节能地运行，提出了一种应用于暖通空调系统故障诊断的新方法——故障向量空间法（ＦＤＳＭ）。ＦＤＳＭ 的基本思想是通过观察一组反映系统或设备结构特性的特征值的变化来进行故障诊断。该方法于１９９５ 年１０ 月在英国牛津接受了国际能源局第２５ 子课题（ｆａｕｌｔｄｅｔｅｃｔｉｏｎ ａｎｄ ｄｉａｇｎｏｓｉｓ ｉｎ ＨＶＡＣｓｙｓｔｅｍ ）主持的竞赛性检验，证明了这种方法的有效性和可靠性。这种方法的提出对ＨＶＡＣ系统的正常运行和节约系统能耗有较大的意义。
In order to effectively diagnose the possible faults in the HVAC system and to ensure the safe and energy-saving operation of the HVAC system, a new method for fault diagnosis of the HVAC system is proposed. The fault vector space method FDSM). The basic idea of FDSM is to diagnose faults by observing a set of eigenvalues that reflect the structural characteristics of the system or equipment. The method was tested in Oxford, England, in October 1995 under the auspices of the Department of Energy’s 25th issue (Fault Diagnosis and Diagnosis in HVAC Systems), demonstrating the effectiveness and reliability of this approach. The proposed method is of great significance to the normal operation of HVAC system and saving system energy consumption.