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Calculation Method of Optimum Damping Ratio of Vehicle Passive Suspension Based on Generalized Dissipative Energy

An optimal damping ratio, passive suspension technology, applied in computing, special data processing applications, instruments, etc., can solve the problems of long cycle and high design cost, improve design level, shorten design cycle, and reduce design and test costs Effect

Inactive Publication Date: 2018-02-13
SHANDONG UNIV OF TECH
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  • Description
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AI Technical Summary

Problems solved by technology

Although this method is feasible, it cannot meet the requirements of the rapid development of the modern automobile industry due to its high design cost and long cycle

Method used

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  • Calculation Method of Optimum Damping Ratio of Vehicle Passive Suspension Based on Generalized Dissipative Energy
  • Calculation Method of Optimum Damping Ratio of Vehicle Passive Suspension Based on Generalized Dissipative Energy
  • Calculation Method of Optimum Damping Ratio of Vehicle Passive Suspension Based on Generalized Dissipative Energy

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Embodiment Construction

[0038] The present invention will be further described in detail through an embodiment below.

[0039] The sprung mass of a single wheel of an off-road vehicle m 2 =350kg, unsprung mass m 1 = 35kg, the stiffness of the passive suspension K = 19897Nm -1 , tire stiffness K t =179073Nm -1 , mass ratio r k =K t / K=9, stiffness ratio r m =m 2 / m 1 =10, natural circular frequency In order to achieve the best vibration damping effect, it is necessary to calculate the optimal damping ratio of this passive suspension.

[0040] The calculation method of the optimal damping ratio of the vehicle passive suspension based on the generalized dissipation energy provided by the example of the present invention, its calculation flow chart is as follows figure 1 As shown, the 1 / 4 vehicle driving vibration model is as follows figure 2 As shown, the specific steps are as follows:

[0041] (1) Determine the vibration acceleration of the vehicle body Wheel dynamic load F d Enter the...

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Abstract

The invention relates to a calculation method for the optimal damping ratio of a vehicle passive suspension based on generalized dissipation energy, and belongs to the technical field of vehicle passive suspension. The present invention establishes the optimization objective function of the passive suspension damping ratio by determining the analytical expressions of the upper bound function and the lower bound function of the passive suspension damping ratio respectively according to the 1 / 4 vehicle driving vibration model; utilizes the damping ratio that minimizes the optimization objective function The generalized dissipation energy of the passive suspension is obtained through the integral operation, and an analytical calculation method for the optimal damping ratio of the vehicle passive suspension based on the generalized dissipation energy is established. Through the comparison of examples and manufacturer's empirical design values, it can be seen that the method can obtain accurate and reliable optimal damping ratio design values ​​of vehicle passive suspension. Using this method can achieve the best compromise between the ride comfort and safety of the vehicle, and improve the design level of the passive suspension of the vehicle; at the same time, it can also shorten the design cycle and reduce the suspension design and test costs.

Description

technical field [0001] The invention relates to a vehicle passive suspension, in particular to a calculation method for the optimal damping ratio of the vehicle passive suspension based on generalized dissipation energy. Background technique [0002] Suspension is an important part of the vehicle, its performance affects and determines the ride comfort and driving safety of the vehicle. At present, the most common suspension type used in automobiles is passive suspension, and its damping ratio has important guiding significance for the damping matching of the suspension system. However, due to the constraints of the optimal damping matching theory of the suspension system, the current There is still no reliable method for the damping ratio design of passive suspensions. According to "Automotive Dynamics" written by Professor Manfred Mitschke of Germany, it is known that the weighting factor for the compromise between ride comfort and driving safety is difficult to determine...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F17/50
Inventor 周长城赵雷雷于曰伟王凤娟邵明磊潘礼军
Owner SHANDONG UNIV OF TECH
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