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Method for tuning and optimizing parameters of dynamic absorber based on machining process

A technology of dynamic vibration absorber and optimization method, applied in the field of machining

Inactive Publication Date: 2013-12-18
TIANJIN UNIV
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  • Description
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Problems solved by technology

Due to the existence of various interferences in the processing process, a parameter tuning method has not been found to ensure that this type of vibration absorber can quickly and effectively absorb external interference signals

Method used

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  • Method for tuning and optimizing parameters of dynamic absorber based on machining process
  • Method for tuning and optimizing parameters of dynamic absorber based on machining process
  • Method for tuning and optimizing parameters of dynamic absorber based on machining process

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Embodiment Construction

[0085] The specific implementation manners of the present invention will be further described in detail below in conjunction with the accompanying drawings.

[0086] It can be seen from the formula (7) that the energy consumption ΔW is a function of the excitation frequency ratio g when the structural parameters are determined. When f=1, , when ζ=0.1, ΔW vs. The relationship curve is as figure 2 shown. In order to illustrate the reason for the peak of the curve, draw X 1 , X 2 and ΔX pair curves such as image 3 shown.

[0087] by right figure 2 with image 3 It can be seen from the observation that the energy consumption near the excitation frequency ratio g=0.9 is mainly due to the increase of the main structure, the dynamic vibration absorber and their relative amplitude, which is contradictory to the limited design space of the dynamic vibration absorber. In order to find satisfactory parameters of the shock absorber, their influence on the energy absorbed in...

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Abstract

The invention discloses a method for tuning and optimizing parameters of a dynamic absorber based on a machining process, which comprises the following steps: firstly, establishing a mathematical model of two degrees of freedom of a vibration system, and then solving the amplitude of the steady-state solution of a dynamics differential equation; taking the relative displacements of a main structure and the dynamic absorber in the viscous damping energy consumption formula; drawing an energy curve, and then making a statistics of the relation between a single factor vibration and the energy peak value; according to the statistics data, fitting the optimal frequency ratio and the optimal damping ratio corresponding to each mass ratio; according to the frequency range of an external disturbance signal, performing integration on the energy that the dynamic absorber can absorb; then, drawing an energy histogram and finding the maximum value so as to obtain the optimal mass ratio; finally, obtaining all optimal parameters of the dynamic absorber. With adoption of the method disclosed by the invention, the vibration caused by external disturbance can be restrained, so that the response speed can be improved by about 50%.

Description

technical field [0001] The invention belongs to the technical field of mechanical processing, and in particular relates to a method for tuning and optimizing parameters of a dynamic vibration absorber. Background technique [0002] In mechanical processing engineering, the vibration problem is an important factor affecting the processing quality and processing efficiency of the workpiece. Especially with the development of industrial production and the continuous improvement of people's requirements for the processing quality of parts, the vibration problem has become a bottleneck restricting the development of the mechanical manufacturing industry. . Therefore, in order to suppress the vibration in the machining process as much as possible, scholars and engineers from all over the world have proposed various control strategies. Among the many control methods, the method of installing the vibration absorber on the main structure has achieved satisfactory results and has bee...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F19/00
Inventor 陈东林滨张彦斌李新月
Owner TIANJIN UNIV
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