Vibration-Based Diagnostics and Structural Analysis of Research on Nonlinear Dynamic Processes in Maglev-Suspension Rotor Turbomachines

Resumo

The mathematical apparatus used in the wavelet and Fourier analyses has been applied to studying the spectral composition of a frequency-domain interaction between nonlinear dynamic processes of the gas-dynamic, mechanical, and electromagnetic nature in maglev-suspension (MLS) rotor turbomachines in different operating modes. A mathematical model for the optimum operation of an automated maglev-suspension–control system (AMSCS) has been developed. Reasons have been revealed for the emergence of a low-frequency carrier subharmonic frequency component of the mechanical nature (an astable mode), which led to the emergency stops of MLS turbosets and to the emergence of flaws in the rotor part of the radial electromagnet and in the stator part of the magnetic suspension. The developed set of scientific and engineering solutions has allowed a 76% reduction in the amplitude of MLS-rotor precession.