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A fast decay method for single pendulum swing

A single pendulum, fast technology, applied in the direction of shock absorber, engine, shock absorber, etc., can solve the problem of low attenuation efficiency of single pendulum, and achieve the effect of improving attenuation efficiency

Active Publication Date: 2020-02-04
NORTHEASTERN UNIV LIAONING
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Aiming at the technical problem of low attenuation efficiency of single pendulum existing in the prior art, the present invention provides a fast attenuation method for single pendulum swing

Method used

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  • A fast decay method for single pendulum swing
  • A fast decay method for single pendulum swing
  • A fast decay method for single pendulum swing

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Embodiment Construction

[0041] In order to better explain the present invention and facilitate understanding, the present invention will be described in detail below through specific embodiments in conjunction with the accompanying drawings.

[0042] A novel fast decay method for single pendulum swing, comprising the following steps:

[0043] Step 1: Create as figure 1 The model of the simple pendulum with a moving slider is shown, and the quality, geometric dimensions and operating conditions of the slider and the pendulum are determined, including the mass m of the slider, the quality M of the swing bar, the distance between the slider and the swing bar The distance l of the turning point O, the length L of the swing rod, and the angle θ between the swing rod and the vertical direction. Assume that the rotation of the pendulum and the sliding of the slider are not affected by friction;

[0044] figure 1 in, l max and l min are the maximum and minimum distances the slider can move on the swing ...

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Abstract

The invention belongs to the technical field of mechanical dynamics, and in particular relates to a method for rapidly attenuating the swing of a single pendulum. The rapid decay formula of a pendulum swing includes the following steps: establishing a pendulum model; establishing the dynamic equation of a pendulum with a moving slider based on Lagrangian theory; and establishing the direction of the Coriolis force when the slider moves. and size, obtain the motion path of the slider that can attenuate the swing of the pendulum; according to the functional conversion relationship during the movement of the slider within a certain range, obtain the acceleration and deceleration motion time or distance of the slider motion as a share of the total motion time or distance ratio; by quantitatively analyzing the equivalent damping ratio generated by the movement of the slider, the movement range and movement time of the slider can be obtained. By analyzing the actual process of the slider movement, the present invention designs the slider movement that has the best effect on suppressing the pendulum swing under actual circumstances. The proposed method is helpful for application in anti-swing active control of pendulum-type structures. This further improves the attenuation efficiency of the pendulum.

Description

technical field [0001] The invention belongs to the technical field of mechanical dynamics, and in particular relates to a fast attenuation method of a single pendulum swing. Background technique [0002] At present, the research on the swing attenuation method of the single pendulum mainly includes changing the pendulum length and moving the swing point of the single pendulum. By using the periodical continuous change of the pendulum length, the swing of the simple pendulum can be gradually reduced, but the method of continuously changing the pendulum length is not efficient. Moving the turning point of the single pendulum to reduce the swing is mostly used in the field of automatic control. Although the automatic attenuation of the swing can be realized through closed-loop control, it cannot achieve high efficiency. Contents of the invention [0003] (1) Technical problems to be solved [0004] Aiming at the technical problem of low attenuation efficiency of a single p...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F16F7/10F03G3/06G06F30/20
CPCF03G3/06F16F7/1005G06F30/20G06F2111/10
Inventor 李朝峰张子健乔瑞环申增闯杨青玉仲秉夫
Owner NORTHEASTERN UNIV LIAONING
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