METHOD FOR TESTING THE ONBOARD EQUIPMENT OF SPACE VEHICLES FOR VIBRATION IMPACTS Russian patent published in 2021 - IPC G01M7/02 

FIELD: testing.

SUBSTANCE: invention relates to the field of testing the equipment for mechanical impacts and can be used in development and acceptance testing of the equipment for aviation, rocket and space technology. The method consists in preliminary determination of the natural frequencies of the equipment and loading with a predetermined normalised impact, followed by correction of the setting impact from the condition of the equipment not exceeding the acceptable loading modes. The points with the maximum responses of the onboard equipment are therein obtained by calculation using the finite element method, followed by determining the places for installation of control sensors during vibration testing based on the results of the finite element modeling and the physical possibility of installation of control sensors. The transfer functions are then calculated from the points with the maximum responses to the control points in each of the frequency sub-ranges, the amount and installation sites of control sensors are selected in each of the three mutually perpendicular directions. The control sensors are then installed, then the onboard equipment is loaded at the minimum level ensuring recording of the responses in the installation sites of the control sensors, the load on the onboard equipment is estimated at points with maximum responses, compared with the acceptable values, and if the acceptable levels are expected to be exceeded, the input impact is sequentially corrected in each of the three mutually perpendicular directions, accounting for the obtained transfer functions by the formula. The vibration testing of the onboard equipment is then performed sequentially in each of the three mutually perpendicular directions on the formed modes.

EFFECT: technical result consists in the possibility of more accurate reproduction of the acceptable vibration load during vibration testing, elimination of unacceptable loads (overloads) on the electronic components and the design of the onboard equipment during testing.

1 cl, 9 dwg