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Optimization method of vehicle handling stability transient performance parameters based on sensitivity analysis

A sensitivity analysis and transient performance technology, applied in the automotive field, can solve problems such as limited space for engineers to optimize, differences in test data, and the impact of test data on vehicle performance evaluation, and achieve the effects of improving safety and reducing costs

Active Publication Date: 2022-07-15
FUJIAN UNIV OF TECH
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Problems solved by technology

[0004] At present, the vehicle handling stability mainly depends on the real vehicle experiment on the field. This method has the following problems: 1. At this time, the performance of the vehicle is basically determined, leaving limited space for engineers to optimize, and a lot of manpower, material resources, financial resources
2. The real vehicle test requires the driver to control the car, which will bring about the difference of test data, which will affect the performance evaluation of the car
3. Due to safety issues, some extreme tests of vehicle handling stability cannot be carried out in practice

Method used

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  • Optimization method of vehicle handling stability transient performance parameters based on sensitivity analysis
  • Optimization method of vehicle handling stability transient performance parameters based on sensitivity analysis
  • Optimization method of vehicle handling stability transient performance parameters based on sensitivity analysis

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Embodiment Construction

[0035] Please refer to Figure 1 to Figure 3 As shown, the preferred embodiment of the vehicle handling stability transient performance parameter optimization method based on sensitivity analysis of the present invention includes the following steps:

[0036] Step S10, establishing a vehicle dynamics simulation model by using the virtual prototype technology, and modifying the parameters of the vehicle dynamics simulation model according to the actual parameters of the vehicle, so that the simulation and optimization of the parameters of the vehicle product can be realized in the early stage of development;

[0037] Step S20: Score the initial transient performance of the vehicle dynamics simulation model according to the vehicle handling stability evaluation index, which is used to evaluate the degree of improvement in the transient performance of the vehicle before and after optimization; the vehicle transient performance score refers to QC / T480- 1999 Vehicle handling stabil...

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Abstract

The present invention provides a method for optimizing transient performance parameters of vehicle handling stability based on sensitivity analysis, which includes the following steps: Step S10, establishing a vehicle dynamics simulation model by using virtual prototype technology, and simulating vehicle dynamics according to the actual parameters of the vehicle Modify the parameters of the model; step S20, score the initial transient performance of the vehicle dynamics simulation model according to the vehicle handling stability evaluation index; step S30, perform sensitivity analysis on the vehicle dynamics simulation model, and screen out parameters with high sensitivity; In step S40, parameters with high sensitivity are optimized by the isight optimization tool; in step S50, the transient performance of the vehicle dynamics simulation model after parameter optimization is scored according to the evaluation index of vehicle handling stability. The advantages of the present invention lie in that the steering stability of the vehicle is optimized in the design stage, the cost of the vehicle is reduced, and the safety is improved.

Description

technical field [0001] The invention relates to the field of automobiles, in particular to a method for optimizing transient performance parameters of automobile handling stability based on sensitivity analysis. Background technique [0002] Today, China has become the world's largest auto trade market, has the world's largest expressway mileage, and the number of private cars is increasing. In order to reduce traffic accidents, the handling stability of active safety of high-speed vehicles has been put on the agenda of researchers in various countries. In the design and development stage, the handling stability (handling stability) The development and control of optimal parameters is of extraordinary significance. [0003] Handling stability is one of the important dimensions of active safety, so the research on handling stability is very necessary. The emergence of computer technology has promoted the development of multi-body dynamics analysis software, enabling enginee...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F30/15G06F30/27G06F111/06G06F111/04G06F119/14
CPCG06F2119/06G06F30/20
Inventor 刘成武郭小斌张利浩
Owner FUJIAN UNIV OF TECH
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