An Assessment of Impulsive Noise via a Double-Ringing Model

The generation and propagation of impulsive noise detected using multiple level detectors on ships's data bus lines is examined in terms of a simple model. This model consists of random switching of an inductive load, followed by near-field coupling, and a double-ringing process. A method of analysis is introduced based on the concept of "probability of peak." This considers a generated impulse in terms of its amplitude only, which is assumed to be a random variable. The analysis is applied to a set of data obtained from on-ship measurement, and a match to the model obtained via curve fitting. Independent assessment supports the model, which yields the decrement of both ringing processes, and the likely maximum impulse amplitude.