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Vibration fatigue theory based method for analyzing failure mode of inertia measurement system

A theoretical analysis and inertial measurement technology, applied in the field of inertial devices, can solve the problems of difficult evaluation of failure modes and failure mode of work performance

Active Publication Date: 2014-11-19
BEIJING INST OF AEROSPACE CONTROL DEVICES
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Problems solved by technology

The disadvantage is that it does not consider the work performance failure mode caused by the structural modal parameter coupling formed by each structural component in the system
Now there is an urgent need for a method to solve the long-standing problem of difficult evaluation of the failure mode caused by the vibration coupling relationship of the structure in the complex electromechanical system, and to realize the full coverage of the failure mode of the inertial measurement system

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  • Vibration fatigue theory based method for analyzing failure mode of inertia measurement system
  • Vibration fatigue theory based method for analyzing failure mode of inertia measurement system
  • Vibration fatigue theory based method for analyzing failure mode of inertia measurement system

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Embodiment Construction

[0033] The working principle and working process of the present invention will be further explained below in conjunction with the accompanying drawings.

[0034] The principle realized by the present invention is: use a vibration tester to form a frequency response function curve fault diagnosis and identification system, calibrate the modal parameters of the internal structure of the inertial device, and use the physical model of each component of the inertial device to draw the eigenmode and boundary stress correction S-N curve, establish spectrum characteristics and inertial device performance failure mode library, and complete inertial device microscopic failure mode judgment.

[0035] like figure 1 As shown, a method for analyzing the failure mode of inertial measurement system based on vibration fatigue theory, the steps are as follows:

[0036] (1) The modal parameter f of the structural composition of the inertial device is measured and calibrated to obtain the struct...

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Abstract

The invention discloses a vibration fatigue theory based method for analyzing failure mode of an inertia measurement system. The method is as below: first, the vibration spectrum of a vibration source in an inertia device during working is detected, so as to obtain full spectrum information of vibration energy transmission; combined with the structural mode of internal composition, micro working state of each composition within the inertia device can observed, and fault points of each composition of the inertia device can be diagnosed accurately. The invention has the advanategs of intuitive characterization, simple operation and high detecting precision, and can effectively realize fault prediction and positioning of inertia device at the whole machine level. The invention is applicable to the evaluation of failure mode of any system containing vibrational excitation.

Description

technical field [0001] The invention relates to a method for analyzing the failure mode of an inertial measurement system based on the theory of vibration fatigue, in particular to a method for visually evaluating the microscopic state of the internal composition and working performance of the system through structural vibration response spectrum analysis, which can be used for the working accuracy of inertial devices Failure mode analysis and fault diagnosis. The invention is applicable to the work failure evaluation of any system containing vibration excitation, and belongs to the technical field of inertial devices. Background technique [0002] Inertial devices are complex electromechanical systems. To determine their failure modes, most existing models use independent FMEA and FMCA analysis for each structural component, mainly starting with factors related to work performance and factors related to functional failure, and then summarizing them in series The advantage ...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01C25/00G01P21/00
CPCG01C25/005G01P21/00
Inventor 杨明朱佩霞姚少非牛冰郭刚邓雅麒孟红关宇美张宏彬刘生炳
Owner BEIJING INST OF AEROSPACE CONTROL DEVICES
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