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Aircraft dynamics monitoring method based on frequency response analysis

A frequency response analysis and dynamics technology, applied in the direction of aircraft component testing, etc., can solve the problem of inaccurate dynamic characteristics, and achieve the effect of reducing flight preparation time, reducing use cost, and reliable theoretical basis.

Active Publication Date: 2018-02-13
SHENYANG AIRCRAFT DESIGN INST AVIATION IND CORP OF CHINA
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Problems solved by technology

[0005] The purpose of the present invention is to provide a method for monitoring aircraft dynamics based on frequency response analysis, which is used to solve the problem in the prior art that the measured dynamic characteristics cannot be measured in an external field environment.

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  • Aircraft dynamics monitoring method based on frequency response analysis
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  • Aircraft dynamics monitoring method based on frequency response analysis

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Embodiment Construction

[0024] In order to make the objectives, technical solutions and advantages of the present invention clearer, the technical solutions in the embodiments of the present invention will be described in more detail below in conjunction with the drawings in the embodiments of the present invention.

[0025] For the dynamic characteristics of the whole aircraft, it is usually obtained through the ground vibration test of the whole aircraft. The test results include the natural vibration frequency, mode, damping coefficient and generalized mass of each order. The test system should include the tested aircraft, support system, excitation system, measurement system, data acquisition and processing system. The test results can be applied to the whole Analyze the flutter of the aircraft to obtain the flutter characteristics of the aircraft, and finally determine the flutter boundary of the aircraft to ensure the safe flight of the aircraft within the operating envelope.

[0026] Usually, ...

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Abstract

The invention relates to an aircraft dynamics monitoring method based on frequency response analysis, and belongs to the technical field of aeroelastic test. The aircraft dynamics monitoring method based on frequency response analysis comprises the following steps: step one, acquiring the reference frequency fri and the inspection frequency fti of an aircraft structure in an ith-order mode; and step two, acquiring frequency weigh errors of an aircraft flutter characteristic according to a weight error formula. According to the external field dynamics monitoring method based on frequency response analysis, dynamics monitoring can be carried out on an external field by simple frequency examination through application frequency response function analysis and mode weight error analysis, thus,the dynamic characteristic of an aircraft in a using process is obtained and is applied to assessment of the flutter characteristic of the aircraft, and finally, the use envelope of the aircraft is given to guarantee flight safety of the aircraft.

Description

technical field [0001] The invention belongs to the technical field of aeroelasticity test, in particular to an aircraft dynamics monitoring method based on frequency response analysis. Background technique [0002] With the rapid development of customer needs, higher requirements are put forward for the use and maintenance costs of aircraft platforms, and the use of aircraft platforms is required to reduce the cost of use while meeting the flight requirements. Therefore, it is one of the development directions of aircraft design to quickly monitor the dynamic characteristics of the aircraft in the field, ensure the efficiency of the aircraft and reduce the cost of use. [0003] At the same time, for the UAV platform system, these UAVs mostly adopt the mode of dismantling and storing the body in normal times, transporting it to the theater for assembly and performing flight missions in wartime. This combat use method reduces the storage and maintenance costs in peacetime an...

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Application Information

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IPC IPC(8): B64F5/60
CPCB64F5/60
Inventor 赵铁铭脱朝智吴江鹏王标
Owner SHENYANG AIRCRAFT DESIGN INST AVIATION IND CORP OF CHINA
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