METHODS AND SYSTEMS TO DERIVE HEALTH OF MATING CYLINDER USING KNOCK SENSORS

A method of deriving the health of a first cylinder (26) in a reciprocating device (12) includes receiving a first signal from a first knock sensor (32) in proximity to the first cylinder, receiving a second signal from a second knock sensor (32) in proximity to a second cylinder (80), processing the first signal and the second signal, and deriving the health of the first cylinder (26) by determining whether the first signal is coherent with the second signal.