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Method for recognizing dynamic load time domain based on second-order system decoupling

A time-domain identification and second-order system technology, applied in special data processing applications, instruments, electrical digital data processing, etc., can solve problems such as limiting the scope of application and affecting the accuracy of load identification

Active Publication Date: 2014-03-05
HARBIN ENG UNIV
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Problems solved by technology

This limits the applicability of such methods and affects the accuracy of load identification

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  • Method for recognizing dynamic load time domain based on second-order system decoupling
  • Method for recognizing dynamic load time domain based on second-order system decoupling
  • Method for recognizing dynamic load time domain based on second-order system decoupling

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Embodiment Construction

[0043] The present invention will be further described below in conjunction with the accompanying drawings.

[0044] Aiming at the deficiency of the system decoupling problem in the existing dynamic load time domain identification method, the invention discloses a dynamic load time domain identification method based on second-order system decoupling.

[0045] The significant difference between the method proposed by the present invention and the prior art is that the decoupling method based on the Lancaster structure is introduced into the load identification problem, and the uncoupled form of the original mechanical system is obtained through the block matrix diagonalization of the equivalent linear system, and the derived The corresponding step-by-step integral iterative formula is derived to realize load time-domain identification. The method proposed by the invention is not only effective for the proportional damping system and the classical damping system, but also effect...

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Abstract

The invention belongs to the field of dynamic load time domain recognition, and particularly relates to a method for recognizing a dynamic load time domain based on second-order system decoupling. The method comprises the steps that a mechanical system parameter matrix is calculated; an original mechanical system is linearized, and the block array of the original mechanical system is diagonalized; the decoupling mode of a mechanical system is calculated; the relation of the real-time response and the load of the system is detected; according to the actual measurement response signal of the mechanical system, the actual load is output, and the load is acquired through the actual measurement response signal. Compared with an existing time domain recognition method, the method for recognizing the dynamic load time domain based on the second-order system decoupling breaks the limit that the time domain recognition method is only suitable for proportional damping in theory, and is wider in application range.

Description

technical field [0001] The invention belongs to the field of dynamic load identification, in particular to a dynamic load time domain identification method based on second-order system decoupling Background technique [0002] The dynamic load identification is based on the dynamic characteristics of the known system and the measured dynamic response to inversely calculate the excitation of the structure. The determination of dynamic load is a difficult problem, but it is also one of the keys to the dynamic design of structures. The identification of dynamic load is very important in structural dynamic response calculation, structural dynamic design and fault analysis, and provides a reliable basis for dynamic calculation, design and analysis of structures. [0003] Load identification methods are mainly divided into two categories: time domain and frequency domain. The frequency domain method is the process of establishing the input-output relationship of the system in the...

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Application Information

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IPC IPC(8): G06F19/00
Inventor 王淑娟沈继红谢晓蓓王国巧周莹张磊
Owner HARBIN ENG UNIV
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