Research Article

Improved Dynamic Optimized Kernel Partial Least Squares for Nonlinear Process Fault Detection

Table 2

List of monitoring variables in TEP [7].

Fault numberProcess variableType

IDV (1)A/C feed ratio, B composition constantStep
IDV (2)B composition, A/C ratio constantStep
IDV (3)D feed temperatureStep
IDV (4)Reactor cooling water inlet temperatureStep
IDV (5)Condenser cooling water inlet temperatureStep
IDV (6)A feed lossStep
IDV (7)C header pressure loss-reduced availabilityStep
IDV (8)A, B, and C feed compositionRandom variation
IDV (9)D feed temperatureRandom variation
IDV (10)C Feed temperatureRandom variation
IDV (11)Reactor cooling water inlet temperatureRandom variation
IDV (12)Condenser cooling water inlet temperatureRandom variation
IDV (13)Reaction kineticsSlow drift
IDV (14)Reactor cooling water valveSticking
IDV (15)Condenser cooling water valveSticking
IDV (16)UnknownUnknown
IDV (17)UnknownUnknown
IDV (18)UnknownUnknown
IDV (19)UnknownUnknown
IDV (20)Valve fixed at steady-state positionConstant position
IDV (21)A/C feed ratio, B composition constantStep