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Multi-target design method o steering system structure

A technology for steering systems and design methods, applied in multi-objective optimization, computing, special data processing applications, etc., can solve problems such as low optimization efficiency, difficulty in finding the global optimum, and inability to provide multi-objective solution sets

Inactive Publication Date: 2017-01-11
NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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  • Application Information

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Problems solved by technology

[0004] Purpose of the invention: In order to overcome the low optimization efficiency of the steering system structure optimization design in the prior art, it is difficult to find the global optimal point and cannot provide accurate multi-objective solution sets, etc., a multi-objective design method for the steering system structure is proposed , can be widely used in the design of conventional and electric vehicle steering systems

Method used

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  • Multi-target design method o steering system structure
  • Multi-target design method o steering system structure
  • Multi-target design method o steering system structure

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Embodiment

[0049] Such as figure 1 As shown, the present invention has developed a multi-objective design method for the structure of the steering system. During the design, the upper column shell, the lower column shell, the upper bracket of the steering column, the lower bracket of the steering column, and the steering column are selected first. The thickness and material type of the column mounting bracket and steering column mounting bracket reinforcement plate are used as design variables and optimized design variables. The optimal Latin square experiment method is used to generate 91 initial sample points, and then the finite element model of the steering system structure is established and the response of the initial sample points is calculated to obtain 91 initial sample point groups.

[0050] Using all obtained finite element models to calculate the sample point groups, the Kriging proxy model f(x), the radial basis function proxy model g(x) and the second-order polynomial respo...

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Abstract

The invention discloses a multi-target design method of a steering system structure. The multi-target design method comprises the following steps: while multi-target design is performed on the steering system structure, generating initial points through an optimal Latin-square experimental method by utilizing the thickness and material types of reinforcing plates of each partial structure in a steering system as design variables, and respectively establishing a Kriging agent model, a radial primary function agent model and a second-order polynomial response surface agent model of the steering system; by utilizing a local important region updating method and a stage sampling strategy, selecting sample points and updating an iterative approximation model; by aiming at different design targets, sequencing the sample points; and coupling the sample points so as to generate different design solution sets, performing selection, and performing design solution set selection and verification by applying a satisfaction degree function. By virtue of reasonable design on the approximation model and a sample point group, the structural design efficiency and structural design precision of the steering system structural design can be obviously improved, so that the performance of the steering system structure is effectively improved and the production cost is lowered.

Description

technical field [0001] The invention belongs to the technical field of automobile steering systems, and in particular relates to a multi-objective design method for steering system structures. Background technique [0002] Steering system is an important part of the car. Due to the direct contact with the driver, the performance of the steering system will directly affect the safety and subjective feeling of the driver. During a car frontal collision, the steering column and steering wheel in the steering system move backwards, and the driver moves forward due to inertia. Therefore, the energy absorption of the steering system structure is very important to the passive safety of the car. influences. During the idling process of the car, the first-order natural mode of the steering system is easy to coincide with the second-order excitation frequency of the engine, which will cause the resonance of the steering wheel. Therefore, the first-order mode of the steering system sh...

Claims

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Application Information

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IPC IPC(8): G06F17/50
CPCG06F30/15G06F2111/06
Inventor 周冠赵万忠王春燕
Owner NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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