Load identification method and load identification device of nonlinear mechanical structure

A technology for mechanical structure and load identification, applied in complex mathematical operations and other directions, can solve problems such as loss of practical significance and large deviation of load identification results, and achieve good applicability.

Active Publication Date: 2017-12-15
XI AN JIAOTONG UNIV
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Problems solved by technology

If the load identification method in the linear structure is directly used for the load identification of the nonlinear structure, the interferenc

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  • Load identification method and load identification device of nonlinear mechanical structure
  • Load identification method and load identification device of nonlinear mechanical structure
  • Load identification method and load identification device of nonlinear mechanical structure

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[0049] Hereinafter, specific embodiments of the present invention will be described in more detail with reference to the accompanying drawings. Although specific embodiments of the present invention are shown in the drawings, it should be understood that the present invention can be implemented in various forms and should not be limited by the embodiments set forth herein. On the contrary, these embodiments are provided to enable a more thorough understanding of the present invention and to fully convey the scope of the present invention to those skilled in the art.

[0050] It should be noted that certain words are used in the description and claims to refer to specific components. Those skilled in the art should understand that they may use different terms to refer to the same component. This specification and claims do not use differences in terms as a way to distinguish components, but use differences in functions of components as a criterion for distinguishing. If "include...

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Abstract

The invention discloses a load identification method and a load identification device of a nonlinear mechanical structure based on state space model. The method comprises the steps that a measurable exciting force is utilized to conduct vibration testing on the nonlinear mechanical structure, and a first vibration response signal at a nonlinear position of the nonlinear mechanical structure is measured; according to the nonlinear category of the nonlinear mechanical structure, a corresponding nonlinear description function is calculated by combining the first vibration response signal; based on the state space model of the nonlinear mechanical structure, a load identification control equation of the nonlinear mechanical structure is obtained, and a subspace method is utilized to calculate a transfer matrix for load identification of the nonlinear mechanical structure; a second vibration response signal of the nonlinear mechanical structure under the dynamic load effect is measured, and a Tikhonov regularization method is utilized to solve a load identification control equation, and load identification of the nonlinear mechanical structure is achieved.

Description

technical field [0001] The invention belongs to the field of nonlinear structure load identification and vibration analysis, in particular to a load identification method and load identification equipment of a nonlinear mechanical structure based on a state space model. Background technique [0002] With the development of modern industry and the change of social needs, people pay more and more attention to various vibration problems in engineering practice. Studying vibration problems and mastering vibration generation and transmission mechanisms will help reduce or even eliminate the adverse effects of vibration on mechanical equipment. Load identification is the core content of vibration problems, and it plays a key role in mechanical structure optimization design, reliability analysis, vibration control and other fields. For most practical engineering structures, due to the limitations of the installation space of the force sensor and the type of dynamic load, it is oft...

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Application Information

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IPC IPC(8): G06F17/11G06F17/16
CPCG06F17/11G06F17/16
Inventor 刘杰李兵张翔李蒙
Owner XI AN JIAOTONG UNIV
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