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| Fault Diagnosis for Refrigeration Systems Based on Principal Component Analysis and Support Vector Machine |
| HAN Hua-1, GU Bo-1, REN Neng-2 |
| (1.Institute of Refrigeration and Cryogenics Engineering, Shanghai Jiaotong University, Shanghai 200240, China； 2.Asia Engineering Center of Building Efficiency Business, Johnson Controls, Wuxi 214028, Jiangsu, China) |
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Abstract Principal component analysis (PCA) was employed to make feature extraction from the vast data pool, and the PCA+SVM (support vector machine) model was established for the fault detection and diagnosis (FDD) of refrigeration systems. Considering that SVM can not be used to solve multiclass classification problems directly, several classical multiSVMs algorithms were analyzed and compared, and the “One vs others” algorithm was adopted. The hybrid PCASVM FDD model was presented and validated by the historical data from specially designed experiments. The results show that it can isolate normal from faulty modes (detection) and has a diagnostic rate of no less than 98.57%, which is better than the SVM model without PCA; model training is about 130—350 times faster than the latter; it also has better performance on dealing with small sample problem than BP neural network with higher diagnostic rate and much less training time (about 1/240).
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Received: 12 April 2010
Published: 30 September 2011
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| [1] |
KANG Jia, HAN Hua, GU Bo, QIU Feng. Air-Side Heat Transfer Modeling Suitable for Fault Detection and Diagnosis of Refrigeration and Air-Conditioning Systems[J]. J. Shanghai Jiaotong Univ.(Sci.) , 2011, 45(09): 1368-1373. |
| [2] |
HONG Ying-Chun, GU Bo, HAN Hua. Fast Calculation Model of Thermodynamic and Transport Properties of R410a Refrigerant: Ⅰ. Equation for Saturation Curve[J]. J. Shanghai Jiaotong Univ.(Sci.) , 2011, 45(09): 1374-1378. |
| [3] |
HONG Ying-Chun, GU Bo, HAN Hua. Fast Calculation Model of Thermodynamic and Transport Properties of R410a Refrigerant：Ⅱ. Equation for Superheat Region[J]. J. Shanghai Jiaotong Univ.(Sci.) , 2011, 45(09): 1379-1383. |
| [4] |
HONG Ying-Chun, GU Bo, HAN Hua. Fast Calculation Model of Thermodynamic and Transport Properties of R410a Refrigerant：Ⅱ. Equation for Superheat Region[J]. J. Shanghai Jiaotong Univ.(Sci.) , 2011, 45(09): 1379-1383. |
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