DEVICE AND METHOD FOR TESTING ARTICLES FOR RANDOM VIBRATION Russian patent published in 2016 - IPC G01M7/02 

FIELD: test equipment.

SUBSTANCE: invention relates to testing articles on random vibration and can be used when determining vibration durability of machines, instruments and equipment. Device includes forming, each including first noise generator (NG) connected to the output of first low-pass filter (LPF), output of which is connected to controlled frequency-modulated generator (FMG), which output is connected to signal input of corresponding adjustable amplifier (AA). Also comprises adder inputs are connected to outputs of AA, vibration exciter, to input is connected to output of adder, vibration sensor, as well as circuit analysis, each of which includes analysing band-pass filter (APF), which is made in form of modulated filter, modulating input is connected to output of corresponding first LPF. Amplitude detector (AD) and comparator unit (CU), which are connected to APF. Display device, to inputs of which outputs of AD are connected. At that, every circuit generating has series-connected NG, second LPF, multiplier, and each circuit analysis additionally contains analysed signal amplifier, which is connected to vibration sensor and is connected to corresponding second LPF and appropriate APF. At that, in every circuit analysis CU is connected with appropriate multiplier of every chain formation, which is connected with appropriate AA.

EFFECT: technical result consists in providing possibility of playing back random non-stationary vibration.

2 cl, 1 dwg