Spike Documentation: Definitions of variables - MattLempa/Predictive-Maintenance-System GitHub Wiki

1 Lever position (lp) [ ] - How the lever is positioned

2 Ship speed (v) [knots] – How fast the ship is going at present in knots

3 Gas Turbine (Gas Turbine) shaft torque (GTT) [kN m] – Rotational power output by

4 Gas Turbine rate of revolutions (Gn) [rpm] – How many rotations per minute the gas turbine’s shaft is spinning

5 Gas Generator rate of revolutions (GGn) [rpm] – How many rotations per minute the generator’s shaft is spinning

6 Starboard Propeller Torque (Ts) [kN] - Torque in kilo-newtons of right-hand propeller

7 Port Propeller Torque (Tp) [kN] - Torque in kilo-newtons of left-hand propeller

8 High Pressure Turbine exit temperature (T48) [C]-Temperature in Celcius of exhaust from High-Pressure Turbine

9 Gas Turbine Compressor inlet air temperature (T1) [C] – Temperature in Celsius of the air flowing into the gas turbine compressor

10 Gas Turbine Compressor outlet air temperature (T2) [C] -Temperature in Celsius of the air flowing out of the gas turbine compressor

11 High-Pressure Turbine exit pressure (P48) [bar] – Barometric pressure from air exiting a high- pressure turbine

12 Gas Turbine Compressor inlet air pressure (P1) [bar] – Barometric pressure of the air entering the Gas Turbine Compressor in bars (1 bar = 14.504 Pounds per square inch)

13 Gas Turbine Compressor outlet air pressure (P2) [bar] – Pressure of the air exiting the Gas Turbine Compressor in bars

14 Gas Turbine exhaust gas pressure (Pexh) [bar] – Barometric pressure of the exhaust from the Gas Turbine in bars

15 Turbine Injecton Control (TIC) [%] -

16 Fuel flow (mf) [kg/s] – How many kilograms of fuel are flowing per second

17 Gas Turbine Compressor decay state coefficient – The coefficient for the expoential decay of performance experienced by the Gas Turbine Compressor over time

18 Gas Turbine Turbine decay state coefficient – The coefficient for the exponential decay of performance experienced by the Gas Turbine