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A method for obtaining dynamic parameters of thin-walled parts by integrating the influence of actuator mass

A technology of dynamic parameters and acquisition methods, applied in the fields of instruments, electrical digital data processing, geometric CAD, etc., it can solve the problems of difficult to use centralized mass modeling method modeling, weak stiffness and other problems, and achieve perfect dynamic quality parameters, Effect of improving vibration control accuracy

Active Publication Date: 2022-07-26
NORTHWESTERN POLYTECHNICAL UNIV
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Problems solved by technology

In the vibration control of large structures, the mass of the actuator follower is relatively small compared to the mass of the controlled structure and has little effect, but it is more serious in the field of vibration control of thin-walled parts
[0004] 2. In the field of vibration control of thin-walled parts, since thin-walled parts are often continuous bodies with weak stiffness characteristics, it is difficult to use the lumped mass modeling method for modeling
[0005] Therefore, aiming at the problem that the dynamic parameters M, C, and K are uncertain during the vibration control of the existing thin-walled parts, and the influence of the actuator on the structural vibration control of the thin-walled parts is ignored, a comprehensive actuator quality control method is proposed. Obtaining Method of Dynamic Parameters for Vibration Control of Affected Thin-walled Parts

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  • A method for obtaining dynamic parameters of thin-walled parts by integrating the influence of actuator mass
  • A method for obtaining dynamic parameters of thin-walled parts by integrating the influence of actuator mass
  • A method for obtaining dynamic parameters of thin-walled parts by integrating the influence of actuator mass

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Embodiment Construction

[0039] The embodiments described below with reference to the accompanying drawings are exemplary, and are intended to explain the present invention and should not be construed as limiting the present invention.

[0040] Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. In the following description, the terms "upper" and "lower" correspond to the upper and lower directions in the drawings. The specific technical route of the present invention is further described through the analysis of the first-order mode. The thin-walled parts in this embodiment are made of uniform material, that is, the areal density ρ(x, y) is constant. In this embodiment, based on the finite element method, the estimated mass value of the maximum deformation point of the thin-walled part is obtained by discrete integration.

[0041] First, the finite element method analyzes the damped parts (also known as thin-walled part...

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Abstract

The invention relates to a method for obtaining dynamic parameters of thin-walled parts that is influenced by the mass of an actuator, and belongs to the field of structural vibration control; the method first performs finite element analysis on thin-walled parts to obtain its total mass matrix M T , the total stiffness matrix K T , the total damping matrix C T . Then, the position of each maximum deformation is obtained through finite element modal analysis, the mass, stiffness and damping parameters of the maximum deformation point are determined according to the method proposed in the present invention, and the mass of the follower of the actuator and the thin-walled parts are accumulated. The mass of the extreme deformation point obtains a new mass parameter, which provides control parameters for structural vibration control. The problem that the action position of the actuator and the dynamic quality parameters of vibration control are ambiguous in the vibration control of thin-walled parts is solved. It makes the vibration control object more reasonable and has strong engineering application significance for specific applications.

Description

technical field [0001] The invention belongs to the field of structural vibration control, and in particular relates to a method for obtaining dynamic parameters of a thin-walled part that integrates the influence of the mass of an actuator, which is suitable for the structural vibration control of a thin-walled part serving as a shell, and the action position of the actuator is uncertain , The dynamic parameters of thin-walled parts at the action point are uncertain and the mass of the actuator follower has a great influence on the structural vibration. Background technique [0002] Active control of structural vibration is to control the structural response by changing the dynamic characteristics such as structural mass, damping and stiffness. Actuators, as active control output devices, are widely used in the field of vibration control and have achieved good vibration control effects. The existing vibration control technology only models the actuator and the controlled p...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F30/23G06F30/17G06F119/14
Inventor 杨宝通陈冰肖敏齐俊德牛智炀赵爽爽高历
Owner NORTHWESTERN POLYTECHNICAL UNIV
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