Compression methods for mechanical vibration signals: Application to the plane engines

Marius Oltean 1, 2 José Picheral 1 Elisabeth Lahalle 1 Hani Hamdan 1 Julien Griffaton 3
1 E3S - Supélec Sciences des Systèmes [Gif-sur-Yvette]
2 UPT - Politehnica University of Timisoara
3 SNECMA Villaroche [Moissy-Cramayel]
Abstract : A novel approach for the compression of mechanical vibration signals is presented in this paper. The method relies on a simple and flexible decomposition into a large number of subbands, implemented by an orthogonal transform. Compression is achieved by a uniform adaptive quantization of each subband. The method is tested on a large number of real vibration signals issued by plane engines. High compression ratios can be achieved, while keeping a good quality of the reconstructed signal. It is also shown that compression has little impact on the detection of some commonly encountered defects of the plane engine.
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Marius Oltean, José Picheral, Elisabeth Lahalle, Hani Hamdan, Julien Griffaton. Compression methods for mechanical vibration signals: Application to the plane engines. Mechanical Systems and Signal Processing, Elsevier, 2013, 41 (1-2), pp.313-327. ⟨10.1016/j.ymssp.2013.07.005⟩. ⟨hal-00871742⟩

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