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Generalized dissipated energy based calculation method for optimal damping ratio of vehicle passive suspension

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

Inactive Publication Date: 2016-02-03
SHANDONG UNIV OF TECH
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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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  • Generalized dissipated energy based calculation method for optimal damping ratio of vehicle passive suspension
  • Generalized dissipated energy based calculation method for optimal damping ratio of vehicle passive suspension
  • Generalized dissipated energy based calculation method for optimal damping ratio of vehicle passive suspension

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Embodiment Construction

[0037] specific implementation plan

[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 ...

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Abstract

The invention relates to a generalized dissipated energy based calculation method for an optimal damping ratio of a vehicle passive suspension, and belongs to the technical field of vehicle passive suspensions. According to the invention, an optimized target function of the damping ratio of the passive suspension is established by determining an upper bound function and a lower bound function of the damping ratio of the passive suspension according to a 1 / 4 vehicle driving vibration model; and generalized dissipated energy of the passive suspension is obtained through an integral operation by utilizing a damping ratio analytic expression minimizing the optimized target function, so that the generalized dissipated energy based analytic calculation method for the optimal damping ratio of the vehicle passive suspension is established. Through comparison of instances and manufacturer experience design values, it is known that the method can obtain an accurate and reliable design value of the optimal damping ratio of the vehicle passive suspension. With the method, the best compromise can be realized in vehicle riding comfort and safety, and the design level of the vehicle passive suspension can be improved; and meanwhile, the design cycle also can be shortened, and the design and test expenses of the suspension can be reduced.

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 can be known that the weighting factor for the compromise between ride comfort and driving safety is difficult to deter...

Claims

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Application Information

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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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