Dynamic centering method of vibration system under vibration condition

Abstract

The invention relates to a dynamic centering method of a vibration system under a vibration condition. The method comprises the following steps: S1, enabling a distance measuring module to measure the distance between a moving coil and the distance measuring module for multiple times and transmit the distance to a control module; S2, solving an average value of a plurality of distances; S3, judging whether the average value is greater than the centering value or not, if so, entering step S4, and if not, entering step S5; S4, judging whether the first difference value is greater than a first error value, if so, deflating the air bag, and if not, keeping the current state; S5, judging whether the second difference value is larger than the first error value or not, if yes, inflating the air bag, and if not, keeping the current state. Through the method, the operation on the air bag is determined according to the judgment on the difference value, the position of the centering state is adjusted by inflating or deflating the air bag, the inaccurate centering state caused by the influence of external factors is corrected, the overall structure is simple, the control is convenient, the centering effect cannot be influenced even if the air bag inclines, meanwhile, the precision is high, and automatic dynamic control is realized.

Description

technical field [0001] The invention relates to the technical field of vibration tests, in particular to a dynamic centering method of a vibration system under vibration conditions. Background technique [0002] The electric vibration table can simulate various vibration dynamic environments, and is widely used in simulation tests of various typical vibrations such as auto parts, electronic components, and stress screening of aerospace products. [0003] The electric vibration table is mainly composed of a table body, a moving coil and an air bag at the bottom of the moving coil. The moving coil reciprocates relative to the table body, and the air bag has a supporting effect; when performing a vibration test, the force of the table body is easily affected by external factors. Influence, such as the quality of the test body, the external air pressure and other factors, and the air pressure in the airbag has not changed at this time, which will cause the moving coil to float o...

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Problems solved by technology

[0003] The electric vibration table is mainly composed of a table body, a moving coil and an air bag at the bottom of the moving coil. The moving coil reciprocates relative to the table body, and the air bag has a supporting effect; when performing a vibration test, the force of the table body is easily affected by external factors. Influence, such as the quality of the test body, the external air pressure and other factors, and the air pressure in the airbag has not changed at this time, which will cause the moving coil to float or sink, so that the center position of the moving coil will change during the test, ranging from It cannot simulate the real stress environment of the test body, which will affect the quality of the test. If it is heavy, it will cause damage to the test body and malfunction

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