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Modal analysis method based on folding control surface rudder system

A modal analysis and rudder system technology, applied in the testing of machines/structural components, measuring devices, vibration testing, etc., can solve the problems of easy loss and misjudgment of the main mode, and achieve the effect of improving reliability and accuracy

Active Publication Date: 2016-05-04
BEIJING MECHANICAL EQUIP INST
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Problems solved by technology

[0003] The purpose of the present invention is to provide a modal analysis method based on the folded rudder surface rudder system, which solves the problem that the main mode is easily lost and misjudged in the modal analysis of the rudder system

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  • Modal analysis method based on folding control surface rudder system
  • Modal analysis method based on folding control surface rudder system

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Embodiment Construction

[0023] A modal analysis method based on a folded rudder surface rudder system, the specific steps are:

[0024] The first step is to build a modal test analysis system

[0025] The modal test analysis system includes: exciter bracket 1, exciter 2, ground rail 3, rudder plate 4, force sensor 5, rudder cabin 6, accelerometer 7, portable computer 8, data acquisition device 10, steering gear 11 , power amplifier 12 and blower fan 13. The modal analysis module 9 runs on the portable computer 8 , and the modal analysis module 9 is used for pre-analyzing the modal of the rudder system and processing and verifying the data collected by the data acquisition device 10 .

[0026] The exciter bracket 1 and the rudder compartment 6 are respectively fixed on the ground rail 3, the rudder plate 4 is fixed on the output shaft of the steering gear 11, the force sensor 5 and the accelerometer 7 are adhered to the rudder plate 4, and the vibrator 2 is fixed On the vibrator support 1 , the vibr...

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Abstract

The invention discloses a modal analysis method based on a folding control surface rudder system. The method comprises following steps: a modal test and analysis system comprising a vibration exciter support (1), a vibration exciter (2), a ground rack (3), a rudder piece (4), a force sensor (5), a rudder room (6), an accelerometer (7), a portable computer (8), a data acquisition device (10), a steering engine (11), a power amplifier (12), and a blower fan (13) is constructed; modal parameters of the rudder system are pre-estimated by a modal analysis module (9); the rubber system is stimulated by the vibration exciter (2), test data is collected by the data acquisition device (10), test results are interpreted by the modal analysis module (9), and the modal purity is verified by the modal analysis module (9). By use of the modal analysis method, the main modal of the rudder system can be accurately recognized and bending modals can be distinguished, modal parameters such as natural frequency, damping ratio, and vibration mode which describe dynamic characteristics of a structural system are determined, and modal recognition reliability and accuracy are increased.

Description

technical field [0001] The invention relates to a modal analysis method of a missile rudder system, in particular to a modal analysis method based on a folding rudder surface rudder system. Background technique [0002] At present, the modal analysis of the rudder system mainly adopts theoretical analysis methods and experimental testing methods. Theoretical analysis methods generally carry out finite element modeling, grid division and numerical solution, so as to obtain the natural frequency and main vibration mode of the structure. The experimental test method uses dynamic test to establish the physical parameter model of the structure, and obtains the inherent characteristics of the system based on the measured data. The theoretical analysis method has fast modeling speed and simple calculation, but the results may deviate from reality due to the difficulty in simulation of transmission chain clearance and boundary conditions. The modal test analysis method conducts on...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01M7/02
CPCG01M7/02
Inventor 郭威董洪川唐旭东杨中巍
Owner BEIJING MECHANICAL EQUIP INST
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