Results of space-flight tests of the vibration-protective platform VZP-1K

The data of microacceleration measurements performed onboard the Mir statio n are analyzed. The data were taken while testing the passive vibration-pro tective platform VZP-1K developed by the NPO "Kompozit." We have processed the results of simultaneous microacceleration measurements on the vibration -protective platform and on the station body close to the platform. Two set s of the French equipment "Microaccelerometer" were used for these measurem ents. It was found that the platform reduces the vibrational component of m icroaccelerations in the band of frequencies above 3 Hz by more than a fact or of 10. In this case, all harmonics with large amplitudes are damped by a factor of 50 and more, and some harmonics with small amplitude are damped only by a factor of 10. In the band 0.3-0.6 Hz (close to natural frequencie s of the platform), the several-fold increase in amplitude of the vibration al component of microaccelerations is observed, but since the initial value s of this amplitude in all performed experiments were small, the above indi cated increase practically has not decreased the vibration-protective prope rties of the platform. The estimations of natural frequencies and damping c oefficients of the platform found as a result of data processing of microac celeration measurements made during its free oscillations are obtained. The dependence of frequencies on the amplitude of oscillations is revealed for one mode, which testifies to appreciable nonlinear effects.