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Parameter Optimization Method of Powertrain Mounting System

A powertrain and suspension system technology, applied in the direction of electrical digital data processing, special data processing applications, instruments, etc., can solve problems such as low efficiency, achieve quality assurance, reduce manual debugging time, and improve computing efficiency.

Active Publication Date: 2019-06-04
上海嘉朗实业有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] The existing powertrain calculation requires manual adjustment during the decoupling calculation process, which is not efficient

Method used

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  • Parameter Optimization Method of Powertrain Mounting System
  • Parameter Optimization Method of Powertrain Mounting System
  • Parameter Optimization Method of Powertrain Mounting System

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0067] see figure 1 , the present invention discloses a parameter optimization method for a powertrain mount system, the parameter optimization method comprising:

[0068] [Step 1] The formation steps of the optimization function;

[0069] Construct an initial composite shape with n vertices in the feasible region; compare the objective function values ​​of each vertex of the composite shape, find out the point with the largest objective function value, that is, the worst point, and remove it; then follow the set rule Construct a new composite shape until the calculation converges;

[0070] The set law adopts the contraction method. No matter how it changes, the new vertex is still in the design space. It is only necessary to judge whether the new vertex is better than the worst point; the calculation method is as follows:

[0071] Xk=Xb+β*(Xh-Xb)

[0072] Among them, Xk is the contraction point, that is, the new point, β is the contraction coefficient; Xb is the lowest poi...

Embodiment 2

[0093] The experimental data of this embodiment are as follows:

[0094] Powertrain Quality Parameters

[0095] m

[0096] Original Design Mounting Rigidity

[0097] direction

[0098] suspension position

[0099] direction

[0100] Mode and energy distribution calculated from initial stiffness

[0101]

[0102]

[0103] It can be seen from the results that its decoupling is very good, but the highest frequency has significantly exceeded the effective vibration isolation range of 18.14Hz, so it needs to be optimized. Compile the program, limit the Kx range of left and right mounts to 100-150, limit the range of Ky to 30-60, and the range of Kz to 100-150; Optimal calculation, the result is as follows:

[0104]

[0105] The modal frequencies and energy distributions are as follows:

[0106] 9.9506Hz

[0107] Except that the energy in the 9.9506Hz direction has increased, the decoupling in other directions has decrea...

Embodiment 3

[0109] A method for optimizing parameters of a powertrain mount system, the parameter optimization method comprising:

[0110] Step 1, the formation step of the optimization function;

[0111] Construct an initial composite shape with n vertices in the feasible region; compare the objective function values ​​of each vertex of the composite shape, find out the point with the largest objective function value, that is, the worst point, and remove it; then follow the set rule Construct a new composite shape until the calculation converges;

[0112] Step 2. Calculation steps of the natural frequency and decoupling rate of the powertrain mount system;

[0113] The powertrain is regarded as a rigid body with 6 degrees of freedom, its characteristics include the position of the powertrain, the quality parameters of the powertrain, and a coordinate system is established at its center of mass, the x-axis points to the rear of the car, and the y-direction points to the front of the engi...

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Abstract

The invention discloses a parameter optimization method for a suspension system of a power assembly. The parameter optimization method comprises the step of formation of an optimization function, the step of calculation of inherent frequency and decoupling rate of the suspension system of the power assembly, the step of selection of an objective function and design variable, and the step of rearrangement output of an analysis result; the power assembly is regarded as a rigid body with six degrees of freedom and is characterized by comprising a power assembly position and a power assembly mass parameter, a coordinate system is established in a center of mass, an x axis points to the rear portion of an automobile, the y direction points to the front end of an engine through the center of mass, the z direction is determined through the x direction and the y direction according to the right hand rule, and the suspension system is simplified as a spring at a certain position in the coordinate system of the power assembly, wherein the spring has three-dimensional translational motion rigidity and damping. By means of the parameter optimization method for the suspension system of the power assembly, the manual debugging time can be saved, the decoupling calculation result of the system can be automatically, intelligently and efficiently calculated, the suspension rigidity can be optimized, the calculation efficiency can be improved, and the suspension decoupling result quality of the power assembly is guaranteed.

Description

technical field [0001] The invention belongs to the technical field of powertrain mount systems, and relates to a powertrain mount system, in particular to a parameter optimization method for the powertrain mount system. Background technique [0002] The existing powertrain calculation requires manual adjustment during the decoupling calculation process, which is not efficient. In view of this, there is an urgent need to design a new decoupling algorithm in order to overcome the above-mentioned defects in the existing technology. Contents of the invention [0003] The technical problem to be solved by the present invention is to provide a method for optimizing parameters of a powertrain mount system, which can reduce manual debugging time, ensure the quality of powertrain mount decoupling results, and improve calculation efficiency. [0004] In order to solve the problems of the technologies described above, the present invention adopts the following technical solutions: ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F17/50
CPCG06F30/15G06F2119/06
Inventor 孙金远
Owner 上海嘉朗实业有限公司
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