Vibrodiagnostics of compressor valves via empirical mode decomposition method

The paper presents a mathematical model of a piston compressor which is a part of an oxygen gas generator. Taking into account the structural parameters of the compressor, as well as the suction and pressurization valves, such model allows one to obtain the dynamics of the pressure amplitude under the compressor's piston with the vibration velocity and vibration acceleration that are transmitted in the form of mechanical affections to the equipment (such mechanical affections can be observed at the corresponding sensors use). We also investigate the use of the Empirical Mode Decomposition algorithm for determination of the compressor's model parameters that determine the defect evolution.