Separation of combustion noise and piston-slap in diesel engine-Part I: Separation of combustion noise and piston-slap in diesel engine by cyclic Wiener filtering

The second part of the paper is devoted to blind source separation (BSS) methods applied on signals issued from accelerometers placed on one of the cylinders. It develops a BSS method based on a convolutive model of non-stationary mixtures and introduces a new method based on the joint diagonalization of time varying spectral matrices of the observations. Both methods are then applied to real data and the estimated sources are finally validated by several physical arguments.