Method for constructing undercarriage model and device thereof

A landing gear and model technology, applied in special data processing applications, geometric CAD, sustainable transportation, etc., can solve the problems of not considering the deformation of the landing gear, lack of deformation information of the landing gear, etc., and achieve the effect of improving the accuracy of the model
CN112989486AActive Publication Date: 2021-06-18BEIHANG UNIV +1
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
BEIHANG UNIV
Publication Date
2021-06-18

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Abstract

The invention discloses a method for constructing an undercarriage model and a device thereof, and the method comprises the steps: building a first undercarriage beam equation based on a partial differential equation according to a geometric nonlinear composite beam which is a strut part of an undercarriage; projecting the first undercarriage beam equation onto a modal basis to convert the first undercarriage beam equation based on the partial differential equation into a second undercarriage beam equation based on an ordinary differential equation; and performing linear order reduction on the second undercarriage beam equation to obtain a low-order undercarriage model. According to the method, deformation load information of each point of the undercarriage can be directly obtained in the model, the vibration condition of the undercarriage can be analyzed conveniently, the equation is projected to a modal basis, a nonlinear partial differential equation is converted into an ordinary differential equation which is easy to solve in time, the model order reduction process is simplified to a great extent, and the model accuracy is greatly improved, so that the method has guiding significance on design model predictive control.
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Description

technical field

[0001] The invention relates to the field of aircraft structure simulation modeling, in particular to a method and device for constructing a landing gear model. Background technique

[0002] As the take-off and landing device of the aircraft, the landing gear has a harsh working environment and complex force conditions during the take-off and landing process of the aircraft. In the process of aircraft braking control law design and ground dynamics analysis, it is necessary to establish a complete and accurate landing gear model.

[0003] The existing modeling and analysis methods of landing gear usually simplify the structure of the landing gear and perform rigid body force analysis. This processing method does not take into account the deformation of the landing gear, and the deformation information of the landing gear is lacking in the vibration analysis. Contents of the invention

[0004] In order to solve at least one of the above technical problems, th...

Claims

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