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This paper deals with the estimation of cylinder pressure of a four-stroke diesel engine which drives a synchronous generator, by applying two methods. The first method is based on the utilization of the current and speed developed by the synchronous generator of the power production system along with the utilization of a mathematical model which considers the dynamic model of the crankshaft. The second method is based on system identification techniques and the development of ARMAX models based on available pressure and acceleration raw data, of an identical diesel engine. This model is applied to acceleration data obtained during the operation of the investigated diesel engine, in order to estimate in-cylinder pressure. Finally, the relevant results of the two methods are compared demonstrating the similarities and differences due to the different approach. [ABSTRACT FROM AUTHOR]

The article presents abstracts of current literature relating to shock and vibration. They include "Active control of noise from a vacuum cleaner," "Hermetically sealed oil-free turbocompressor technology," and "Near field acoustic holography (NAH) theory for cyclostationary sound field and its application."