Broadband double-table parallel pushing test system based on sliding table

Abstract

The invention discloses a broadband double-table parallel pushing test system based on a sliding table. Two sets of vibration power amplifiers are electrically connected to a first vibrating table anda second vibrating table respectively; a sliding table is arranged between the first vibrating table and the second vibrating table and is fixedly connected to the first vibrating table and the second vibrating table; the sliding table is rotationally connected to a sliding plate; a moving coil of the first vibrating table and the sliding plate are fixedly supported; a moving coil of the second vibrating table is hinged to the sliding plate; a test piece in the test system is fixed on the sliding plate; an acceleration sensor is arranged on the test piece; the acceleration sensor is in signalconnection with a controller; the controller is in signal connection with the two sets of vibration power amplifier signals; and after the controller receives a detection signal of the acceleration sensor, the controller sends a driving signal to the vibration power amplifiers. According to the system, the exciting force of the two vibrating tables is applied to the same test piece, and loading of sinusoidal and random vibrations with the broadband of 10 Hz to 2000 Hz is achieved; and through the system, the authenticity of the vibration environment test simulation of the big-quality test piece can be improved, and the working efficiency is improved.

Description

technical field [0001] The invention relates to the technical field of vibration environment engineering, in particular to a sliding platform-based broadband double-platform push test system. Background technique [0002] When carrying out the vibration test of a large mass specimen, the thrust of a single shaking table is insufficient to carry out the test. In the prior art, a dual-vibration table or multi-vibration table parallel pushing method is adopted to solve this problem. The existing dual-stage parallel push test system mostly adopts the vertical direction excitation working mode. In this working mode, the displacement of the moving coils of the two shaking tables is not synchronized in the double-table parallel push test, which will cause the moving coils to bear a large bending moment and even cause damage. In order to avoid damage to the moving coil due to asynchronous displacement of the two vibrating tables, guide devices or ball-twist connections are usually...

AI Technical Summary

Problems solved by technology

It is usually solved by decomposing a large-mass test piece into components and carrying out component-level vibration tests separately, but there are shortcomings such as long test period, high cost, and reduced the authenticity of test simulation.

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