Damping-adjustable magneto-rheological lag damper

Abstract

The invention relates to a damping-adjustable magneto-rheological lag damper. The damping-adjustable magneto-rheological lag damper comprises a cylinder barrel, a piston rod, a piston component and a damping adjusting mechanism. Stub shafts are integrally produced at the outer edge of the left end of the cylinder barrel symmetrically and radially, and an end cover is mounted at the right end of the cylinder barrel hermetically and coaxially. The piston rod is penetratingly mounted in the cylinder barrel coaxially, and two ends of the piston rod are positioned outside the cylinder barrel. The piston component is mounted at the position, on the inner left side of the cylinder barrel, of the piston rod coaxially. The damping adjusting mechanism is slidably mounted at the position, corresponding to the piston component and positioned on the inner right side of the cylinder barrel, of the piston rod coaxially and rotates around an axial center by a certain angle prior to being fittingly mounted together with the piston component, and the left end, positioned outside the cylinder barrel, of the piston rod is in coaxial threaded connection with a rod-end joint bearing. The damping-adjustable magneto-rheological lag damper has the advantages of simple structure, low energy consumption, small size, rapidity in response, continuous forward and reverse adjustability in damping force within a wide range, good temperature stability, easiness in combination with a computer to achieve intelligent control and the like, thereby being quite promising in application prospect.

Description

technical field [0001] The invention belongs to the technical field of mechanical vibration control, and relates to a magneto-rheological damper with adjustable damping. Background technique [0002] When the aircraft is taking off or landing, the front wheel of the landing gear will produce a severe shimmy in the lateral and torsional directions that deviates from the neutral position of the wheel and couples with each other. Any wheel that can be steered may have shimmy phenomenon, such as the front wheel of a car and a trolley with steering wheels often appear shimmy phenomenon when moving. [0003] The cause of aircraft front wheel shimmy is: a very complex self-excited vibration caused by the mutual coupling between the lateral vibration of the pillar and the front wheel and the torsional vibration of the front wheel around the axis of the pillar. The energy to maintain this self-excited vibration It is provided by the force and moment that the ground acts on the tire ...

AI Technical Summary

Problems solved by technology

For larger shimmy vibrations, the shimmy vibration control must be realized by reducing the orifice and increasing the piston, which increases the volume of the shimmy absorber and increases the mass of the aircraft. At the same time, the passively controlled shimmy disturbance insensitivity, which is very unfavorable for reducing aircraft shimmy

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