An electrodynamically excited six-degree-of-freedom vibration test device

Abstract

The invention discloses an electrodynamically excited six-degree-of-freedom vibration test device, which includes a working platform, a vibrating table, a motion decoupling device, a frame, etc.; the working platform is placed horizontally, and six sets of electric Vibration excitation device, each set of electric vibration excitation device is respectively connected to the frame; each set of electric vibration excitation device includes an electric vibration table, a transfer device, and a double ball joint decoupling device; the first, second, and third vibration tables are Horizontal vibrating tables, the fourth, fifth, and sixth electric vibrating tables are vertical vibrating tables; the present invention uses the least 6 vibrating tables, and realizes three-axis linear vibration in space, The three-axis angular vibration in space and the six-degree-of-freedom vibration in space have realized the six-degree-of-freedom function in a true and complete sense, and have the characteristics of a large vibration frequency range and small waveform distortion.

Description

technical field [0001] The invention belongs to the technical field of vibration test equipment in mechanical environment tests, and in particular relates to a six-degree-of-freedom vibration test device composed of six electrodynamic vibration tables. Background technique [0002] Vibration is one of the main factors causing failure of aerospace and transportation equipment. According to the failure statistics of the US aerospace department, more than 50% of the failures of aerospace vehicles are related to vibration; in the failure statistics of the Chinese aviation industry department, vibration-induced equipment failures account for 40%. The product is actually in a multi-dimensional vibration environment, but limited by the ability of the test equipment, the traditional test method is to conduct a single-direction vibration test separately, but the failure mechanism of some military equipment is unique to the multi-axis environment, and the single-direction vibration te...

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Problems solved by technology

[0004] At present, domestic and foreign three-axis six-degree-of-freedom vibration test devices are mostly realized by 8 hydraulic vibration tables. Due to the use of hydraulic vibration tables as excitation sources, this kind of equipment has the disadvantages of low vibration frequency and large waveform distortion, and the required vibration source is relatively large. Many, high cost, and relatively complicated control; in the prior art, five vibration generators are used as excitation sources. Although the number of vibration tables is small in this way, the X, Y, and Z three In the direction, it can only realize the rotation around one of the directions, and cannot realize the real rotation strictly around the other two directions at the same time, so the so-called six degrees of freedom function realized by it is lacking and imperfect.

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