PROCESS OF FORMATION OF SPECTRA OF RANDOM VIBRATION Russian patent published in 2001 - IPC

FIELD: mechanical engineering, testing equipment. SUBSTANCE: random narrow-band signals are formed in each frequency band of working range. Values of inherent spectral densities of accelerations in control points of article are specified. Vibration of article in frequency band of working range is created. Values of inherent spectral densities of acceleration in control points are measured in each narrow frequency band. Values of squares of moduli of complex transfer functions of vibration paths in control points are found. Values of mutual spectral densities of accelerations are set in each frequency band of working range in various control points of article. Values of mutual spectral densities of accelerations are measured in each narrow frequency band in various control points. Values of all products of complex transfer functions of vibration paths in various control points of article computed by pairs by functions complexly dependent on them are determined by measured values of mutual spectral densities of accelerations in each narrow frequency band. Gain factors of amplifiers of former of random narrow-band signals are determined by preset values of inherent and mutual spectral densities of accelerations, by obtained values of squares of moduli of complex transfer functions of vibration paths in control points of article and by values of all products of complex transfer functions of vibration paths in various control points of article computed by pairs into functions which are complexly dependent on them. EFFECT: increased quality of formation of spectra. 1 dwg