Control method for magneto-rheological shimmy damper of aircraft landing gear

A technology of aircraft landing gear and control method, which is applied in the direction of landing gear, aircraft parts, transportation and packaging, etc. It can solve the problems of poor control reliability, achieve simple control process, improve control reliability, and avoid the effect of sudden increase in current

Active Publication Date: 2020-05-26
北京保力马测控技术有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

This technology helps improve controller performance during takeoffs or landings at different height levels without affecting other parts like wheels or tires. By determining the appropriate amount of magnetic fluid needed for optimal operation based upon these factors, the system ensures stable ride quality while reducing vibrations over time.

Problems solved by technology

This patented technical problem addressed in this patents relates to improving the performance of an airborne vehicle's rear axle system (RAS) under various conditions like turbulence caused by runway crossing or ground roller contact. To address these issues, there are methods proposed where a reduction machine called Shimony Reductor(SHM), installed at each end between the main body of the RAS and the wheel hub, helps reduce unwanted movement while maintaining stable flight operations. Additionally, it allows for continuous adjustments based upon the position of the SOM being driven along without adding extra weight compared to previous designs.

Method used

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  • Control method for magneto-rheological shimmy damper of aircraft landing gear

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Embodiment Construction

[0039] In the following description, specific details such as specific system structures and technologies are presented for the purpose of illustration rather than limitation, so as to thoroughly understand the embodiments of the present application. It will be apparent, however, to one skilled in the art that the present application may be practiced in other embodiments without these specific details. In other instances, detailed descriptions of well-known systems, devices, circuits, and methods are omitted so as not to obscure the description of the present application with unnecessary detail.

[0040]It should be understood that when used in this specification and the appended claims, the term "comprising" indicates the presence of described features, integers, steps, operations, elements and / or components, but does not exclude one or more other Presence or addition of features, wholes, steps, operations, elements, components and / or collections thereof.

[0041] As used i

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Abstract

The invention relates to a control method for a magneto-rheological shimmy damper of an aircraft landing gear. The control method comprises the steps that the aircraft height, the aircraft flight speed, the aircraft flight deceleration and the aircraft descent speed are obtained; when the aircraft height is lower than a first height threshold value and higher than a second height threshold value,the initial working current of a coil of the magneto-rheological shimmy damper is obtained according to the aircraft flight speed, the aircraft flight deceleration and the aircraft descent speed; whenthe height of the aircraft is lower than a second height threshold value, acquiring an aircraft taxiing speed, an aircraft wheel swing angle, an aircraft wheel swing angle speed and an aircraft wheelswing angle acceleration; and the initial working current is adjusted according to the airplane taxiing speed, the airplane wheel swing angle, the airplane wheel swing angle speed and the airplane wheel swing angle acceleration, and a final working current value is obtained. Firstly, the control process of the control method is simple and free of cumbersome, the control reliability is further improved, the working current of the magneto-rheological shimmy damper coil can be accurately controlled, and the damping of the magneto-rheological shimmy damper can meet the requirement.

Description

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Claims

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Application Information

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Owner 北京保力马测控技术有限公司
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