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A Vibration Reduction Method Oriented to Vehicle Engine Vertical Vibration

A vertical direction, engine technology, used in vehicle components, power units, instruments, etc., can solve problems such as errors and error characterization

Inactive Publication Date: 2019-05-07
BEIHANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, with the continuous development of science and technology, people are increasingly aware that although linear vibration theory can be used to obtain satisfactory results in solving many practical engineering problems, in many occasions, such as large-amplitude vibrations, linear vibration theory Analysis will bring big errors and even qualitative errors

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  • A Vibration Reduction Method Oriented to Vehicle Engine Vertical Vibration
  • A Vibration Reduction Method Oriented to Vehicle Engine Vertical Vibration
  • A Vibration Reduction Method Oriented to Vehicle Engine Vertical Vibration

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Embodiment Construction

[0113] The present invention will be described in detail below in conjunction with the accompanying drawings and numerical calculation examples.

[0114] The invention proposes a semi-active damping method based on internal resonance for the vertical vibration of a vehicle engine, including engine modeling with a direct-acting vibration absorber and internal resonance analysis. In order to clearly and concisely illustrate the vibration reduction method proposed in the present invention, a simplified model is used here instead of a specific engine model. The specific steps of the method are as follows:

[0115] Step 1: Establish a coordinate system for the engine included in the direct-acting vibration absorber, and specify the coordinate direction on which the direct-acting vibration absorber acts.

[0116] like figure 1 As shown, establish the coordinate system of the engine dynamics model.

[0117] Define the Go-xyz coordinate system at the center of mass of the engine. ...

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Abstract

The invention relates to a vibration reduction method for vertical vibration of a vehicle engine comprising eight steps. The vibration reduction method for the vertical vibration of the vehicle engine is based on vibration reduction of semi-active control; by using a Lagrangian dynamics method, the vibration reduction method starts from a modeling of an engine powertrain, then takes into account a direct-actuated vibration absorber, and carries out an overall dynamic modeling according to a control scheme. A nonlinear dynamic model is analyzed to solve an energy relationship between a controlling mode and a controlled mode. An internal resonance switching effect is adjusted by adjusting nonlinear terms of a structure, and a damping effect is added to reduce vibration energy of the vehicle engine. By using an internal resonance phenomenon to reduce vibration, the vibration reduction method for the vertical vibration of the vehicle engine has the advantages of obvious vibration reduction effect, strong robustness, low energy consumption and good practical value in the vibration reduction of the vehicle engine.

Description

technical field [0001] The invention relates to a method based on semi-active vibration reduction, which constructs a semi-active vibration absorber based on internal resonance from a nonlinear point of view, and can form an energy exchange channel between the vehicle engine and the vibration absorber, so that the vertical direction of the vehicle engine The vibrational energy is transferred into the absorber and dissipated by the damping of the absorber. The invention belongs to the technical field of vibration control of vehicle engines. Background technique [0002] Due to the complexity of the structure of the car and the uncertainty of the road conditions, sometimes there will be high noise and vibration in the cabin when the vehicle is running. Dizziness and vomiting; as far as the current stage is concerned, the noise pollution inside the vehicles independently produced and equipped in our country is relatively serious. The quality of the noise environment in the ca...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B60K5/12G06F17/50
CPCB60K5/1266G06F30/15G06F30/20Y02T90/00
Inventor 边宇枢王硕高志慧
Owner BEIHANG UNIV
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