Research Article
A Fault Prognosis Strategy Based on Time-Delayed Digraph Model and Principal Component Analysis
Table 1
Description of process variables.
| Number | Variables | Descriptions | Units |
| 1 | PDI_1 | Resistance of the lower tower | KPA | 2 | LIAS_2 | Liquid oxygen level of condenser evaporator | MM | 3 | AI_701 | Argon content of the argon fraction | % | 4 | TI_16 | Temperature of the argon fraction | DEGC | 5 | PDI_701 | Resistance of CAC I | MPA | 6 | PIS_701 | Outlet pressure of CAC II | MPA | 7 | PDI_702 | Resistance of CAC II | KPA | 8 | FI_702 | Flow rate of the argon fraction | M3/HR | 9 | LIC_701 | Liquid air level of condenser | MM | 10 | AI_705 | Argon content of the crude argon gas | % |
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