Three-degree-of-freedom electric vibration test system with isotropic layout

Abstract

The invention is suitable for the related field of mechanical environment test equipment, and provides a three-degree-of-freedom electric vibration test system with an isotropic layout, which comprises a base and a working table, the electric vibration table is arranged on the machine base; the decoupling device is arranged on the electric vibration table, and the decoupling device is connected with the working table top; the reaction device support is arranged on the machine base, and a reaction device acting on the working table top is arranged on the reaction device support; wherein the reaction devices comprise the X-direction reaction device and the Y-direction reaction device, air springs are arranged in the X-direction reaction device and the Y-direction reaction device, and through cooperative arrangement of the electric vibration table, the decoupling device and the reaction devices, the three-axis linear vibration precision is effectively improved.

Description

technical field [0001] The invention relates to the related field of mechanical environment test equipment, in particular to a three-degree-of-freedom electrodynamic vibration test system with isotropic layout. Background technique [0002] Vibration is one of the main factors causing failure of aerospace and transportation equipment. 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 test cannot be reproduced Its multidimensional vibratory response malfunctions. Certain military products such as inertial measurement components, aerospace engines, warhead fuzes, communication equipment, and vehicle power supplies have extremely high demands for multi-degree-of-freedom vibration tests. There i...

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Problems solved by technology

3.2. In the hydraulic ball hinge layout scheme, the additional stiffness and additional mass introduced by the three axial decoupling devices are not equal, and the three axial boundaries of the worktable are anisotropic; the decoupling device plus rubber restraint device scheme Due to the elasticity of the rubber, the constraint effect on the three rotational degrees of freedom is poor, and unnecessary rotational motion will be mixed into the three-axis linear motion of the worktable, so it has the disadvantages of low vibration response accuracy and large waveform distortion. May cause test failure or damage to the test piece

[0004] In addition, limited by the characteristics that the automatic centering device of the vibrating table can only provide thrust but not pull, the automatic centering device of the vibrating table cannot function when there is no reaction force on the opposite side of the vibrating table. The existing three-degree-of-freedom electrodynamic vibration test system There is a problem that the static and static state in the horizontal direction cannot be automatically centered

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