Orthogonality of the signals of vibration acceleration, vibration velocity and vibration displacement in vibration analysis problems

In the practice of vibration analysis and control the signals of vibration acceleration and vibration displacement are often not taken into account. They are considered to be interconnected with vibration velocity signal because these parameters are interrelated by differential-integral ratios. At the same time the search for orthogonal diagnostic characteristics and their use for evaluation of equipment condition is an actual problem because it significantly increases reliability of the diagnostics.

The results of fundamental investigations of vibration processes in machines and attached structures, which have been accomplished under the direction and with the participation of the authors, show that the development of various malfunctions of rotary machines causes diverse reaction of vibration acceleration, vibration velocity and vibration displacement parameters to these malfunctions. These cases indicate significant constriction of the range of diagnosing malfunctions when used only one of these parameters.

Thus, the problem of estimation of independence degree of the signals of vibration acceleration, vibration velocity and vibration displacement emerges.

Kostyukov V.N., Kostyukov Al.V. Orthogonality of the signals of vibration acceleration, vibration velocity and vibration displacement in vibration analysis problems // Engine-2007. - 2007. - p. 500-506

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