FIELD: testing equipment.
SUBSTANCE: stand comprises a base whereon additional plates with vibration-insulated devices and recording equipment are located, aircraft equipment, for example, two identical on-board compressors for obtaining compressed air on board the aircraft, are mounted on the base. One compressor is mounted on standard rubber vibration insulators and another compressor is mounted on the examined dual-mass vibration insulation system. The latter comprises rubber vibration insulators and an elastically damping intermediate plate with vibration insulators, for example, in the form of plates made of polyurethane, which are placed on the rigid bulkhead mounted on the base through the vibration cushioning gasket, as well as the standard rubber vibration insulators. A vibratory sensor is mounted on the rigid bulkhead, between the compressors, a signal from the vibratory sensor is sent to the amplifier and recording equipment, such as octave spectrometer, operating in the frequency band (Hz): 2; 4; 8; 16; 31.5; 63; 125; 250; 500; 1000; 2000; 4000; 8000 Hz, and then the obtained amplitude-frequency operation characteristics of each compressor are compared, and the conclusions about the effectiveness of vibration insulation of each system on which they are mounted are drawn.
EFFECT: expanded technological capabilities of testing the objects having several elastic couplings with the body parts of the flying object.
2 cl, 5 dwg
