A single-acting magneto-rheological shock absorber for aircraft landing gear

Abstract

The invention relates to a single-action magneto-rheological shock absorber for aircraft landing gear, comprising an outer cylinder, an inner cylinder, a piston rod, a piston assembly and a wheel shaft base, and the top of the outer cylinder is coaxially sealed and installed End cover, the lower end of the outer cylinder is coaxially slid to install the inner cylinder, the lower end of the inner cylinder is threaded to install the wheel shaft base, the inner and outer cylinders are coaxially installed with the piston rod, and the upper end of the piston rod is fixed to the end cover Together, the lower end of the piston rod mounts a piston assembly whose outer edge is in frictional contact with the inner wall of the inner cylinder. On the basis of the existing aircraft landing gear buffer structure, the present invention adds a piston assembly that can apply magneto-rheological fluid technology, so that the shock absorber has simple structure, low energy consumption, small volume, fast response, and its output damping force can be continuously changed. Adjustable and reversible, the closed-loop semi-active control is realized by combining with computer, optimized control algorithm, sensor, controller and power supply, which improves the buffering efficiency and shock absorption effect of the shock absorber.

Description

technical field [0001] The invention belongs to the field of aircraft accessories, and relates to a single-acting magneto-rheological shock absorber for aircraft landing gear that can realize semi-active control. Background technique [0002] As an important part of the aircraft structure, the landing gear of the aircraft bears the static and dynamic loads generated when the aircraft is in contact with the ground, and absorbs and consumes the energy generated by the aircraft during landing, runway taxiing and other ground movements. Aircraft landing gear plays an important role in slowing down the vibration of the aircraft, reducing the load transmitted by the ground on the aircraft structure, improving the comfort of the passengers, and ensuring the flight safety of the aircraft. [0003] Currently, most modern aircraft landing gear use oil-pneumatic shock absorbers. The oil-gas shock absorber achieves shock absorption through the energy consumption of the oil flowing thro...

AI Technical Summary

Problems solved by technology

When dealing with large impact loads, it must be achieved by increasing the throttle and increasing the stroke of the piston, which will increase the mass of the landing gear

In addition, the vibration control response of the oil-pneumatic shock absorber to the external load and the output damping force is passive, which reduces the cushioning performance and shock absorption effect of the shock absorber.

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