A new multi-axis force-controlled vibration test fixture

Abstract

The invention provides a novel multi-axis force controlling vibration test fixture which has a separated structure and comprises an upper fixture which is connected to a whole through screws, a tri-direction force sensor and a lower fixture, wherein the upper fixture and the tri-direction force sensor are arranged on the lower fixture, the upper fixture is connected with the tri-direction force sensor, the lower fixture comprises a lower fixture bottom interface; the tri-direction force sensor is used to measure the interfacial forces in three directions between a satellite and the fixture in the process of a satellite multi-axis vibration test, and feedbacks to a measuring system to achieve a force limiting control under the multi-axis vibration test. The novel multi-axis force controlling vibration test fixture solves technical problems of satellite multi-axis and force controlling vibration test fixture designing, and utilizes the separated fixture structure form to enable the first order resonance frequency of the fixture to be 3 to 5 times higher than that of the satellite, and the high strength and stiffness provides guarantees for the safe implementation of the satellite multi-axis and force controlling vibration test.

Description

technical field [0001] The invention relates to a satellite multi-axis force-controlled vibration test fixture, especially belongs to the design field of multi-axis vibration, force-controlled vibration test and fixture, and specifically relates to a novel multi-axis force-controlled vibration test fixture. Background technique [0002] At present, the ground mechanical vibration test in the aerospace field is mainly a unidirectional acceleration response control method. This method is relatively easy to implement and low in cost, so it is widely used in spacecraft mechanical vibration tests, but it is difficult to avoid under-testing and over-testing during the test process. . In order to overcome under-testing and over-testing and ensure product reliability, multi-axis and force-controlled vibration test technologies are gradually being applied. The multi-axis vibration test technology is based on the premise that the uniaxial vibration test cannot completely simulate the...

AI Technical Summary

Problems solved by technology

[0003] Aiming at the defects in the prior art, in order to solve the problem that the interface between the satellite and the vibrating table does not match, and it is required to measure the interface force between the satellite and the fixture during the test, and to realize force limit control, the present invention provides a new type of multi-axis force limiter. Vibration test fixture

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