Three-way vibration control method of subway floating slab based on magnetorheological grease isolator

Abstract

The invention provides a control method for three-way vibration of an underground floating slab based on magneto-rheological fat vibration isolators. Four semi-active magneto-rheological fat vibration isolators are arranged under the underground floating slab so that vibration energy of the underground floating slab on the vertical direction, rolling and pitching can be restrained. The advantage of being capable of controlling damping of the magneto-rheological fat vibration isolators is fully utilized, and a vertical-rolling-pitching vague vibration isolation control not relaying on a mathematical model and a self-adaptation strategy are adopted. The transmission of the vibration energy of the floating slab to a foundation is reduced respectively on the vertical direction, the horizontal direction and the longitudinal direction within a broadband range. The series defects that a traditional passive vibration isolator can not self-adaptively adjust a damping value along with changes of exciting vibration, and is poor in low frequent vibration isolation effect, and the like are overcome, and the problem of broadband vibration isolation of multi-directional vibration coupling of a rail of the underground floating slab can be solved.

Description

technical field [0001] The invention relates to the field of automatic control, in particular to a method for controlling the three-way vibration of a subway floating plate based on a magneto-rheological grease vibration isolator. Background technique [0002] The subway floating slab track is not only the vibration source of the subway traffic but also the intermediate way to transmit the wheel-rail vibration to the foundation. Its vibration has the characteristics of broadband and multi-directional coupling. The transmission of vibration energy reduces the adverse effects and hazards on the structure of buildings along the subway, residents' lives, and precision instruments. [0003] At present, the floating plate generally adopts rubber and steel spring passive vibration isolation system, which can effectively isolate the wheel-rail vibration in a wide frequency range, but the parameters of the passive vibration isolator cannot be adjusted and controllable in real time ac...

AI Technical Summary

Problems solved by technology

However, the wheel-rail excitation generated by subway operation is a broadband vertical, pitch-roll coupling vibration, which is uncertain, and it is difficult to establish an accurate mathematical model. It is necessary to adopt a semi-active control method that takes into account multi-directional vibration.

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