Research Article
Two-Stage Degradation Assessment and Prediction Method for Aircraft Engine Based on Data Fusion
Table 3
Parameter types and description in datasets.
| | Symbol | Description | Units |
| | Id | Engine number | — | | Cycle | Current engine cycle | — | | Setting1 | Operation parameter setting 1 | — | | Setting2 | Operation parameter setting 2 | — | | Setting3 | Operation parameter setting 3 | — | | Sensor parameters available for analysis | | S1 | T2 | Total temperature at fan inlet | °R | | S2 | T24 | Total temperature at LPC outlet | °R | | S3 | T30 | Total temperature at HPC outlet | °R | | S4 | T50 | Total temperature at LPT outlet | °R | | S5 | P2 | Pressure at fan inlet | Psia | | S6 | P15 | Total pressure in bypass-duct | Psia | | S7 | P30 | Total pressure at HPC outlet | Psia | | S8 | Nf | Physical fan speed rpm | Rpm | | S9 | Nc | Physical core speed rpm | Rpm | | S10 | Epr | Engine pressure ratio (P50/P2) | — | | S11 | Ps30 | Static pressure at HPC outlet | Psia | | S12 | Phi | Ratio of fuel flow to Ps30 | Pps/psi | | S13 | NRf | Corrected fan speed | Rpm | | S14 | NRc | Corrected core speed | Rpm | | S15 | BPR | Bypass ratio | — | | S16 | farB | Burner fuel-air ratio | — | | S17 | htBleed | Bleed enthalpy | — | | S18 | Nf_dmd | Demanded fan speed | Rpm | | S19 | PCNfR_dmd | Demanded corrected fan speed | Rpm | | S20 | W31 | HPT coolant bleed | Lbm/s | | S21 | W32 | LPT coolant bleed | Lbm/s |
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