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A Method of Inertial Parameter Identification Based on Modal Testing Technology

A technology of inertial parameters and identification methods, applied in the field of inertial parameter identification based on modal testing technology

Active Publication Date: 2020-07-07
NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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  • Description
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Problems solved by technology

[0003] In order to overcome the problems existing in the prior art, the embodiment of the present invention provides a new test method, which can meet the requirements of obtaining all 10 inertial parameter results in one test under the condition of high spring support stiffness and containing elastic mode and noise interference. , and maintain a higher precision method

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  • A Method of Inertial Parameter Identification Based on Modal Testing Technology
  • A Method of Inertial Parameter Identification Based on Modal Testing Technology
  • A Method of Inertial Parameter Identification Based on Modal Testing Technology

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Embodiment Construction

[0017] The embodiment of the present invention provides a structural inertial parameter identification test technology suitable for high stiffness spring support and environment with large noise interference, which can maintain high identification accuracy under the conditions of elastic mode and noise influence, In addition, the number of measuring points is reduced, and the intensity of testing work is greatly reduced, which has certain engineering practical significance.

[0018] The method of the present invention is used for the identification of structural inertia parameters in the actual factory environment. The identification of the structural inertia parameters in the actual factory environment is affected by the spring support system with relatively large stiffness, resulting in insufficient rigid body mode and large noise influence in the test environment. , in order to achieve the above object, the implementation of the present invention adopts the following steps: ...

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Abstract

The embodiment of the invention discloses a structural inertia parameter identification method based on a vibration mode test technology. A vibration test and analysis technology is designed. Structural inertia parameters can be fast and accurately identified under a boundary condition with high support stiffness and an environment condition with large noise. The method is suitable for testing with large noise in a factory environment. The method provided by the invention comprises the combination of a direct parameter identification method based on a structural frequency response characteristic and a residual inertia method.

Description

technical field [0001] The invention relates to the technical field of vibration testing, in particular to an inertial parameter identification method based on modal testing technology. Background technique [0002] Inertial parameters such as mass, center of mass position, moment of inertia and product of inertia are important parameters required in the process of structural dynamic simulation, performance optimization, finite element analysis, mounting installation position and angle selection. The structural inertia parameter identification method based on vibration testing technology has gradually become a new research hotspot. At present, it is mainly divided into three methods, including direct parameter identification method, residual inertia method and modal model method. The residual inertia method is widely used; the direct parameter identification method is based on the real part data of the acceleration frequency response function spectrum between the structure's...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01H17/00G01M1/00G01M1/12G01M1/10
CPCG01H17/00G01M1/00G01M1/10G01M1/122
Inventor 王彤何宇翔
Owner NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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