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
CN107009866BInactive Publication Date: 2019-05-07BEIHANG UNIV
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
BEIHANG UNIV
Publication Date
2019-05-07
Estimated Expiration
Not applicable · inactive patent

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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.
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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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