Magnetorheological buffering unit structure based on impact load and control method thereof

Abstract

The invention discloses a magnetorheological buffering unit structure based on impact load and a control method thereof, aiming to mainly solve the technical problems that parameters of an oil-gas type buffer cannot be adjusted in working process, and accordingly a landing gear buffer cannot be balanced with a large power energy source required from outside for realizing ground sliding, landing off and actively controlling the landing gear. The magnetorheological buffering unit structure comprises a magnetorheological damper and a magnetorheological liquid chamber, and the magnetorheological liquid chamber can move in the magnetorheological damper through a sealing device. During testing, the unit structure main body is mounted on an impact test platform. Variable-structure oil holes of a conventional oil-gas type buffer are replaced by oil-needle-free constant-interface oil holes, passed oil damping force is controlled by applied magnetic field, and magnetic field is supplied by applied current. The magnetorheological buffering unit structure is reasonable in structure and capable of buffering impact energy produced by impact force effectively, and meanwhile, oil return holes can prevent wheels from jumping off the ground while landing. The magnetorheological buffering unit structure has functions of an oil-gas type passive-control buffer, realizes half-active buffer control effect, and is mainly applied to the technical field of aviation.

Description

technical field [0001] The invention relates to a magneto-rheological buffer unit structure facing impact loads, in particular to an impact load buffering device used in conjunction with aircraft landing gear. At the same time, aiming at the buffer control problem of the above-mentioned unit structure, a control strategy that effectively avoids the complex influence of the control method caused by the nonlinearity of the magnetorheological fluid is proposed, and the design and programming implementation of the control based on model prediction are completed. Mainly used in the field of aviation technology. Background technique [0002] Taking aircraft landing gear as an example, most aircraft landing gears at home and abroad currently use oil-pneumatic passive control buffers. The oil-pneumatic buffer has the advantages of simple structure, easy realization and high reliability. But once it is manufactured, its parameters cannot be adjusted during the working process, and ...

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Problems solved by technology

[0005] The purpose of the present invention is to solve the above-mentioned problems, and mainly solve the problem that the parameters of the oil-gas type buffer are not adjustable during the working process, and the resulting landing gear buffer is difficult to take into account both taxiing and landing, and the active control of the landing gear requires a larger Power source technical issues

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