MULTI-SEGMENT NON-RIGID STRUCTURES MODAL TESTS PERFORMANCE METHOD

FIELD: astronautics.SUBSTANCE: invention relates to the modal tests performance methods of the multi-segment, non-rigid, unfolding space structures designed to operate in zero gravity (for example, large reflectors and solar panels). Essence: exciting the stationary oscillations in the structure and using the sensors, measuring the structural elements response kinematic parameters at the certain plurality of selected points. With the structure weightlessness, minimizing the displacements degrees of freedom limitation by the weightlessness constant forces and variable oscillations excitation forces application at the same points. Simultaneously, at the said points, performing the displacement measurements using the bench consisting of the same type mobile floor devices, using which during the segment movement, tracking the force application point coordinates and ensuring the force action accurate standardization by the three orthogonal directions, regardless of the force application point position. During the bench preparation for operation, each floor device is calibrated by the procedure, in which the parameters of the generated force dependence on the electrodynamic exciters armatures and stators mutual position at given currents in the coils, storing this data in the floor devices memory and using it for the forces accurate formation during the test.EFFECT: minimization of operations during the bench preparation for testing, absence of restrictions on the weightlessness points choice on the structure segments, absence of necessity for additional force sensors and kinematic parameters application, automation of the structure weight balancing procedure during placement on the test bench into the test position, normalized compensation of the weightless structure spatial drift, minimization of the tested structure degrees of freedom limitations during the weightlessness state simulation, and removal of restrictions on the weightlessness points free displacements amplitude, caused by the linear force exciters rods small strokes.5 cl, 2 dwg Изобретение относится к способам проведения модальных испытаний многосегментных нежестких раскрываемых конструкций космического назначения, рассчитанных на работу в невесомости (например, крупногабаритных рефлекторов и панелей солнечных батарей). Сущность: возбуждают в конструкции стационарные колебания и с помощью датчиков проводят измерения кинематических параметров отклика элементов конструкции на некотором множестве вы