DIAGNOSTICS OF UUV ENGINE OPERATING CONDITIONS USING ENTROPY OF VIBRATION NOISE
Using zero-crossing of vibration noise in logical space, noise entropy is determined as a probability matrix which takes the diagonal form for equally probable distribution. The transfer matrix displays the engine operational state and could be found using fast discrete Laplace transformation on the Galois field GF(2n). The last forms the Reed-Mueller higher-order code that enables troubleshooting and provides assessment of the engine state.