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Magneto-rheological suspension time-frequency characteristic multi-objective optimization method for vibration suppression of whole vehicle

A technology of multi-objective optimization and time-frequency characteristics, applied in design optimization/simulation, combustion engine, internal combustion piston engine, etc., can solve problems such as difficult to achieve NVH quality matching relationship of mounting subsystem, split coupling vibration relationship, etc. Achieve the effects of reducing conflicts, improving performance, and optimizing structural parameters

Active Publication Date: 2021-10-29
CHONGQING JIAOTONG UNIVERSITY
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  • Application Information

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Problems solved by technology

However, as an important subsystem of the whole vehicle, the powertrain mount system separates the coupled vibration relationship between the powertrain mount system, the body and the powertrain, and studies the body optimization of the magneto-rheological mount in isolation. Excellent matching relationship between system and vehicle NVH quality

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  • Magneto-rheological suspension time-frequency characteristic multi-objective optimization method for vibration suppression of whole vehicle
  • Magneto-rheological suspension time-frequency characteristic multi-objective optimization method for vibration suppression of whole vehicle
  • Magneto-rheological suspension time-frequency characteristic multi-objective optimization method for vibration suppression of whole vehicle

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Embodiment Construction

[0052] Below in conjunction with accompanying drawing, the present invention is further described:

[0053] The present invention provides a multi-objective optimization method for the time-frequency characteristics of magneto-rheological mounts for vehicle vibration suppression, which is characterized in that: the optimization method includes the following steps: figure 1 as shown,

[0054] S1: Use the existing dynamics simulation software to build a 10-degree-of-freedom vehicle dynamics model, the 10-degree-of-freedom includes 3-degree-of-freedom powertrain, 3-degree-of-freedom body and 4 single-degree-of-freedom unsprung masses;

[0055] S2: Construct the finite element model of the magnetic circuit: determine the magnetorheological mount, carry out structural parameter modeling in the finite element software according to the magnetorheological mount, and use the finite element software to analyze the electromagnetic field of the magnetorheological damper, and obtain Magne...

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Abstract

The invention discloses a magneto-rheological suspension time-frequency characteristic multi-objective optimization method for vehicle vibration suppression. The method is based on a multidisciplinary optimization platform, studies contribution capability of suspension structure parameters to vehicle NVH quality and an effective time-frequency domain action range, extracts time-frequency characteristics of typical working condition vibration response by adopting a time-frequency analysis method, and carries out multi-objective optimization on the magneto-rheological suspension by taking effective improvement of the NVH quality of the vehicle as an optimization objective. The method has important guiding significance for improving the original design optimization concept based on the suspension subsystem and the matching design of the power assembly suspension system and the whole vehicle NVH.

Description

technical field [0001] The invention relates to the field of auto parts design, in particular to a multi-objective optimization method for time-frequency characteristics of a magneto-rheological mount oriented to vehicle vibration suppression. Background technique [0002] Automobile lightweight is an important measure to achieve the goal of automobile energy saving and emission reduction. However, the lightweight of automobiles will bring more severe vibration and noise problems. A powertrain suspension system with good performance can effectively reduce vibration and noise inside the vehicle, improve ride comfort, and better protect the powertrain. Therefore, in order to adapt to the development of automobile lightweight technology, the development of high-performance powertrain mounting system has become an urgent need to improve the quality of vehicle NVH noise, vibration and harshness (Noise, Vibration, Harshness). The existing optimization design methods for magnetor...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F30/15G06F30/23G06F119/14
CPCG06F30/15G06F30/23G06F2119/14Y02T10/40Y02T90/00
Inventor 邓召学蔡强韦鑫鑫
Owner CHONGQING JIAOTONG UNIVERSITY