Smart cars represent the evolution of intelligent automotive products trend, can provide safer, more energy efficient, more environmentally friendly, more convenient and free mobile solutions and integrated solutions, the significance of not only lies in the upgrading of automotive products and technologies, more likely to become a car And all-related industries and the remodeling of value chain system is an important component of the internationally recognized strategic development of the automobile industry in the strategic high ground in order to promote the automotive industry a virtuous circle of design, production and sales, to stimulate car manufacturers to enhance the automotive intelligence Level, urging car manufacturers to continuously explore higher intelligent technologies and devices, and provide reference for consumers when buying cars. At the 2017ICV International Forum, China Automotive Technology Research Center (CATIC Center) Institute of Intelligent Vehicle Intelligence Wang Yu, director of Automobile Research Center and Automobile Software Evaluation Center, released the topic of "Research on Intelligent Index and Evaluation Methods of Vehicles".
Wang Yu
According to Wang Yu introduction, at this stage, there are semi-automatic driving and automatic driving functions of intelligent vehicles, different functions.The SAE International car in the framework of intelligent classification, proposed to cover laboratory evaluation, practical verification evaluation , Consumer satisfaction and other 'Trinity' evaluation system, the establishment of autonomous driving, car networking, information security and vehicle information services based on the evaluation index system, and comprehensive use of the advantages and disadvantages of different evaluation methods, combined with big data analysis , The final calculation of the car intelligent index comprehensive evaluation score. 'The evaluation system aims to provide a basis for the assessment of the level of intelligent cars for the intelligent development of the automotive industry to provide a benchmark value, so as to continuously promote the smart car in safety, experience, energy consumption , Efficiency and other aspects of the overall upgrade. '
At present, the task is to complete the framework research report and benchmark research parameters by the research group of CATIC Center. In 2018, the force of industry-wide research will be assembled to complete the questionnaire survey, theoretical model evaluation system, sub-project research and real vehicle verification, In 2019, the index evaluation result based on the intelligent performance of automobiles will be researched and released.
System and Indicators of "Research on Intelligent Vehicle Index and Evaluation Method"
In order to protect the comprehensiveness, objectivity and practicability of the automobile intelligent index and evaluation, the evaluation system of the "Trinity" such as laboratory evaluation, practical verification and evaluation and consumer satisfaction, as shown in the following figure, make full use of the laboratory / demonstration base, etc. Virtual and actual test scenarios for intelligent testing of vehicles, combined with smart car-related science and technology events on the annual evaluation of smart cars, taking into account the needs of consumers for the smart car scene needs and the actual function of smart car matching analysis, the final draw Automotive intelligent level scores and ranking results.
Automotive intelligent index evaluation system
According to the multi-level tree structure, the evaluation index system of automobile intelligent index can be divided into one layer of indicators, two layers of indicators and three layers of indicators, and the indexes of each level are interlinked with each other, and the indicator framework is as shown in the figure below. Automotive intelligent index evaluation index, on behalf of the measure of the final vehicle intelligent index index, the next can be divided into two indicators, three indicators, four indicators.
Automotive intelligent index evaluation indicator level framework
First of all, the automatic driving index is used to measure the performance of the smart driving car in the aspect of the automated driving system. Secondly, the networking technology is the key technology for the development of the smart car and also the smart car Importantly, Internet-linked index is used to measure the basic performance of autonomous vehicles in car networking. Thirdly, information security has always been the focus of smart car production and use. The information security index is used to measure the information security of intelligent networks. Finally, in addition to meeting the driving demand, smart cars need to provide smart car users with services such as on-board information. Smart cars enable users to drive cars through smart phones, wearable devices, and in-car entertainment facilities Of leisure and entertainment activities, this aspect of the use of audio-visual entertainment system index measurement.Automobile intelligent index evaluation index system three indicators, is through the basic capabilities of different systems of intelligent cars to assess the automotive in automation, networking, security, entertainment And other aspects of the ability.
Model and Algorithm of "Research on Intelligent Index and Evaluation Method of Automobile"
As shown in Figure 3, the core part of the evaluation model of automobile intelligent index is: to determine the complete evaluation index system and to select the appropriate evaluation method. The main steps of vehicle intelligent index evaluation based on the model are described as follows: Should select the appropriate vehicle intelligent evaluation parameters, and parameters and data pretreatment; Second, the construction of automobile intelligent index evaluation index system, and select the relevant parameters of important indicators and data; Third, the use of comprehensive evaluation of the evaluation index system In the middle of the weight of indicators set, and closely integrated with big data analysis methods for analysis and processing, different evaluation and analysis methods also determine the difference of comprehensive evaluation model; Finally, based on the relevant parameters of intelligent cars and data, evaluation index system and the core Algorithm to calculate the intelligent score, and draw the final result of the intelligent evaluation of the car.
Automotive intelligent index evaluation model
The core of the EVI evaluation model lies in the selection of evaluation methods, and the important part of the evaluation method is the determination of the index weights, which has an important impact on the objectivity and accuracy of the comprehensive evaluation results. Differences are often also the difference between the different comprehensive evaluation method, the method of calculating the weight coefficient can be broadly divided into two categories' 3 ': one is the subjective weighting law; the other is the objective weighting method, of which the analytic hierarchy process' 4 'mainly considers the opinions of experts, draws on the experts' knowledge and experience, generally has higher rationality, but still can not overcome the existence of subjective and arbitrary large defects; the entropy method '5' can fully tap the original data The value of information itself, relative to AHP, is more objective, but it does not reflect the knowledge and experience of experts and the opinions of decision-makers, which may lead to inconsistencies between the obtained weights and actual importance. Therefore, The advantages and disadvantages of the method, the combination of analytic hierarchy process and entropy can be used to determine the weight of the vehicle intelligent index.In addition, But also make full use of big data analysis methods, based on a large number of intelligent data obtained from the car, select the appropriate data mining algorithms to evaluate the level of intelligent cars.