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Collaborative optimization method and system for damping nonlinear commercial vehicle suspension dynamics

A collaborative optimization and commercial vehicle technology, applied in design optimization/simulation, instrumentation, electrical digital data processing, etc., can solve problems such as reducing the accuracy of simulation calculation results, improve development and optimization efficiency, improve comprehensive dynamic performance, The effect of shortening the development cost and development cycle

Pending Publication Date: 2020-07-24
GUILIN UNIV OF ELECTRONIC TECH +1
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

[0003] For the convenience of modeling, the vehicle vibration differential is established based on Lagrangian theory or Newton's second law, and the vibration model is established in MATLAB / Simulink to carry out simulation calculation methods. The nonlinear dynamics of the suspension are usually ignored in the modeling process It is easy to know from the analysis of the influence of factors such as relationship and damping installation attitude on it: simple linear equivalent processing of suspension parameters will reduce the accuracy of simulation calculation results

Method used

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  • Collaborative optimization method and system for damping nonlinear commercial vehicle suspension dynamics
  • Collaborative optimization method and system for damping nonlinear commercial vehicle suspension dynamics
  • Collaborative optimization method and system for damping nonlinear commercial vehicle suspension dynamics

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Embodiment 1

[0055] The method of the present invention establishes an improved commercial vehicle vibration calculation model based on the introduction of shock absorber dynamic nonlinear factors, so as to improve the reliability of its vibration-related analysis calculation and optimization design, and solve the existing heavy commercial vehicle ride comfort Or the problem of the roughness of the comfort calculation model; this embodiment also proposes a ride comfort, chassis front and rear suspension dynamic travel as the optimization target, suspension stiffness, nonlinear damping coefficient and cab rear suspension installation angle as design variables, The collaborative optimization method of suspension dynamics with the constraint conditions of wheel dynamic load, suspension static stroke and suspension bias frequency uses a multi-objective optimization strategy to solve the problem that the ride comfort and suspension dynamic stroke are contradictory and unable to coordinate and wor...

Embodiment 2

[0160] refer to Figure 7(a) ~ Figure 7(f) , is the second embodiment of the present invention. This embodiment is different from the first embodiment in that it describes a collaborative optimization method for damping nonlinear commercial vehicle suspension dynamics, which can solve the optimization objectives in existing optimization methods The problem of low optimization efficiency and narrow practicability of the optimization method is caused by a single definition and insufficient coordination of the comprehensive performance of the suspension.

[0161] In order to verify that the method of the present invention can solve the problem of narrow practicability of the optimization method caused by the rough calculation model, the single definition of the optimization target and the insufficient coordination of the comprehensive performance of the suspension in the existing commercial vehicle ride comfort and comfort optimization methods, this embodiment respectively The de...

Embodiment 3

[0172] refer to Figure 8 and Figure 9 , is the third embodiment of the present invention, which is different from the first two embodiments in that it provides a collaborative optimization system for damping nonlinear commercial vehicle suspension dynamics, including:

[0173] The display module 100 is used for displaying simulation motion and analysis, comparison, and verification calculation results, which includes a main window unit 101 and an auxiliary window unit 102, and the target commercial vehicle vibration model simulation result animation and parameters are displayed on the main window unit 101 interface.

[0174] The master control module 200 is connected with the display module 100, and is used to adjust parameters, set collaborative optimization objectives, collaborative design variables and collaborative optimization constraint conditions, control the operation of the simulation program, and transmit the operation results to the display through the input and out...

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Abstract

The invention discloses a damping nonlinear commercial vehicle suspension dynamics collaborative optimization method and system. The method comprises the steps: respectively building a target commercial vehicle vibration model and a suspension assembly nonlinear model; sequentially setting a collaborative optimization target, a collaborative design variable and a collaborative optimization constraint condition; writing and calling a multi-objective algorithm program and associating an optimization objective, a design variable and a constraint condition; driving the target commercial vehicle vibration model to perform simulation calculation to obtain numerical indexes of smoothness and suspension dynamic stroke, and obtaining and comparing multiple groups of feasible solutions meeting constraint conditions; selecting an optimal solution simultaneously meeting smoothness and suspension dynamic travel performance indexes as an optimization result; and completing collaborative optimizationby utilizing an optimization result. According to the method, a more accurate vibration calculation model is established on the basis of the nonlinear relationship of the suspension damping dynamics,the smoothness of the seat guide rail is improved by utilizing a multi-objective optimization strategy, the dynamic stroke of the cab suspension and the chassis suspension is reduced, and the purposeof optimizing the suspension dynamics is achieved.

Description

technical field [0001] The invention relates to the technical field of automobile engineering, in particular to a collaborative optimization method and system for damping nonlinear commercial vehicle suspension dynamics. Background technique [0002] In recent years, the road freight transportation industry and the number of commercial vehicles used have developed with the development of the domestic economy, and commercial vehicles have played an increasingly important role in the road freight transportation industry; high-quality development has become a major trend, and high comfort Ride comfort is required to be one of the main vehicle performance indicators that manufacturers are concerned about. Suspension is a key component that affects vehicle ride comfort. When its related parameters affect ride comfort, they also contradict other performances related to suspension. Based on this, it is of great significance to enhance the ride comfort of the vehicle and the compreh...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F30/20G06F30/15G06F30/17G06F119/14
Inventor 何水龙陈科任许恩永邓聚才向家伟
Owner GUILIN UNIV OF ELECTRONIC TECH
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