Vibration table control method and device

Abstract

The invention discloses a vibration table control method and device. The control method comprises the following steps that a plurality of pieces of position information, sent by a position sensor, ofa moving coil are continuously obtained; the center position of the moving coil is acquired based on the plurality of pieces of position information; when it is determined that the center position islocated above a preset center position, an air pump is controlled to pump air from an inner cavity, and the larger the absolute value of the difference between the center position and the preset center position is, the higher the air pumping speed is; and when it is determined that the center position is located below the preset center position, the air pump is controlled to inflate air from the inner cavity, and the larger the absolute value of the difference between the center position and the preset center position is, the higher the inflation speed is. Therefore, the change of the air pressure of the surrounding environment can be adapted, and the vibration of the moving coil can be accurately controlled.

Description

technical field [0001] The invention relates to the technical field of mechanical environment test equipment, in particular to a control method and device for a vibrating table. Background technique [0002] The vibration table can simulate various environmental vibrations encountered by products in manufacturing, assembly, transportation and use, and is used to evaluate whether the product can withstand environmental vibrations. Its structure is usually as follows: figure 1 As shown, it includes: a pressure-bearing table body 1 with an inner cavity 11 , a moving coil 2 arranged in the inner cavity 11 and a driving device, which can drive and adjust the vibration of the moving coil 2 . In addition, air is usually used to flow through the inner cavity 11. It can be understood that the upper end surface of the inner ring 2 is subjected to the downward pressure of the air in the surrounding environment (as shown by the solid arrow in the figure), and the lower end surface is su...

AI Technical Summary

Problems solved by technology

In addition, it may cause the moving parts in the driving device to be impacted. When this impact cannot be balanced in time, the moving coil will deviate from the center position until the equipment protection is triggered. Experimental vibration test

[0003] When an aircraft is flying at high altitude, it is usually in a relatively low-pressure environment. When the aircraft is parked at an airport on the ground, it is usually in a relatively high-pressure environment. When taking off or landing, the air pressure of the environment where the aircraft is located usually changes greatly. And fast, therefore, when performing vibration tests on aircraft and its related components, it is necessary to put the aircraft, related components and vibration table into a confined space, and quickly adjust the air pressure in the confined space, it is understandable that , which causes a sudden change in the thrust force on the moving coil 2, resulting in the inability to precisely control the vibration of the moving coil 2

Images