Comprehensive Evaluation and Optimal Design for the Vehicle Handling

2005 ◽  
Author(s):  
Changfu Zong ◽  
Konghui Guo ◽  
Hsin Guan
Keyword(s):  
Comprehensive Evaluation ◽  
Subjective Evaluation ◽  
Objective Evaluation ◽  
Loop System ◽  
System Model ◽  
Evaluation Index ◽  
Design Parameters ◽  
Close Loop System ◽  
Vehicle Handling ◽  
Individual Evaluation

In this paper, a comprehensive evaluation method for vehicle handling based on the driver’s subjective evaluation to different vehicle configurations has been studied by using development driving simulator tests. An objective evaluation index is developed which consists of several individual evaluation indices affecting vehicle handling. A series of weighting factors corresponding to individual evaluation indexes are found by using the Genetic Algorithm to reach the best agreement between the objective evaluation and the average of subjective evaluation of the drivers. Simulator test scheme has been designed and carried out with 14 vehicle configurations, and subjective evaluation has been made for easy handling of vehicle by a group of drivers. A driver/vehicle close-loop system model has been established which can predict the vehicle motion of handling and stability. Vehicle design parameters and control parameters of its control system have been optimized by using the driver/vehicle close-loop system model and objective evaluation index.

scholarly journals Subjective Product Evaluation System Based on Kansei Engineering and Analytic Hierarchy Process

Symmetry ◽  
2020 ◽  
Vol 12 (8) ◽  
pp. 1340 ◽  
Author(s):  
Yaxue Zuo ◽  
Zhenya Wang
Keyword(s):  
Evaluation System ◽  
Comprehensive Evaluation ◽  
Subjective Evaluation ◽  
Reliability And Validity ◽  
Objective Evaluation ◽  
Product Evaluation ◽  
Kansei Engineering ◽  
Analytic Hierarchy ◽  
Evaluation Indexes ◽  
Hierarchy Process

Product evaluation is very important for product improvement and development, and subjective product evaluation determines customer’s evaluation of products to some extent, so the purpose of this study is to establish a reasonable subjective product evaluation system. In this study, we comprehensively determine the evaluation indexes based on Kansei engineering (KE), establish an overall product evaluation system by using analytic hierarchy process (AHP), and establish the subjective product evaluation system by classifying the evaluation indexes in the overall product evaluation system into “objective evaluation index” and “subjective evaluation index”, removing the objective evaluation indexes, and retaining the subjective evaluation indexes. Additionally, we select some modern chairs as experimental samples to verify the reliability and validity of this subjective product evaluation system by means of questionnaires. The experimental results show that, in this subjective product evaluation system, the subjective evaluation of the product is positively correlated with the “favorite” level of the product in comprehensive evaluation, and negatively correlated with the “least favorite” level of the product in comprehensive evaluation, indicating that this subjective product evaluation system realizes a symmetry between subjective product evaluation and comprehensive product evaluation. Therefore, it can be concluded that this subjective product evaluation system based on KE and AHP proposed in this study has reliability and validity, and can be used for product evaluation to judge the popularity of products and enhance the competitiveness of products.

Simulation for Vehicle Handling Performance Based on the Cybernetic Model of “Driver-Vehicle-Road” Closed-Loop System

2011 ◽  
Vol 299-300 ◽  
pp. 1256-1261
Author(s):  
Hui He ◽  
Kun Zhang ◽  
Peng Wang
Keyword(s):  
Closed Loop ◽  
Steering System ◽  
Loop System ◽  
System Model ◽  
Driver Model ◽  
Closed Loop System ◽  
Cybernetic Model ◽  
Vehicle Performance ◽  
Vehicle Handling ◽  
Handling Performance

In this paper, a cybernetic model of “driver-vehicle-road” closed-loop system including a driver model and a steering system model is built under the MATLAB/Simulink environment. Then, the influence of different dynamic characteristics of steering system on vehicle handling and stability is studied. The results suggest that the “driver-vehicle” model built has a high tracking precision in following the path; Increasing the rigidity of steering system or decreasing the dilatory distance of front tire can enhance the tracking precision and can minish the driving burden and the fatalness of side-tip, the total evaluation result of vehicle performance will be optimized as well.

Study on Fuzzy Comprehensive Evaluation Model of Printing Quality Based on AHP Method

2010 ◽  
Vol 174 ◽  
pp. 243-246 ◽  
Author(s):  
Jun Wang ◽  
Tie Feng Zhang ◽  
Xiang Yi Guan
Keyword(s):  
Comprehensive Evaluation ◽  
Evaluation Model ◽  
Subjective Evaluation ◽  
Pairwise Comparison ◽  
Fuzzy Comprehensive Evaluation ◽  
Objective Evaluation ◽  
Fuzzy Evaluation ◽  
Printing Quality ◽  
Comprehensive Evaluation Model ◽  
Comparison Judgment

A fuzzy comprehensive evaluation model of printing quality was established by using the method of fuzzy evaluation and analytical hierarchy process(AHP).The main parameters which influence printing quality were analyzed. The factor set to constitute fuzzy comprehensive evaluation was confirmed. The structure of analytical hierarchy was established by analyzing different plans, which influences printing quality evaluation. Comparison judgment matrixes were constructed by pairwise comparison of each factor using Saaty 1-9 scales. The weights of every factor were determined by calculating the feature vectors of comparison judgment matrixes and the consistency test. Finally the printing quality hierarchy was evaluated by using fuzzy comprehensive evaluation and according to maximum membership principle. The result indicated that the model objectively determined the weights of parameters which influence printing quality, subjectively evaluated the printing quality hierarchy, and realized the unification of subjective evaluation and objective evaluation.

Comprehensive evaluation of kraft pulp properties from fast-growing woods

TAPPI Journal ◽  
2010 ◽  
Vol 9 (6) ◽  
pp. 34-39
Author(s):  
AIYU QU ◽  
YANHUI AO ◽  
JUN YAN ◽  
GUIGAN FANG
Keyword(s):  
Kraft Pulp ◽  
Comprehensive Evaluation ◽  
Evaluation Model ◽  
Evaluation Index System ◽  
Evaluation Index ◽  
Wood Cellulose ◽  
Fuzzy Matrix ◽  
Fast Growing ◽  
Pulp Properties ◽  
Evaluation Index Systems

To develop new wood cellulose resources and fast-growing pulpwood plantation fiber sources, it is very important to evaluate their pulping properties. A comprehensive multi-index pulping-suitability evaluation model is investigated in this paper by considering four fast-growing wood species. First, a new evaluation-index system for kraft pulp was developed based on traditional evaluation-index systems. Then, the membership degree of every index was analyzed to obtain a fuzzy matrix. The proportional contribution of each parameter to the main pulping properties could then be determined. Finally, a comprehensive evaluation model of kraft pulp properties was developed. The model is reliable compared with traditional assessment methods. The results confirmed the feasibility and rationality of developing new wood cellulose resources and fast-growing pulpwood plantations using fuzzy comprehensive evaluations.

METHODOLOGY OF OBJECTIVE EVALUATION OF THE QUALITY BEARINGS BY VIBRO-ACOUSTICS AND ITS COMPARISON WITH A SUBJECTIVE METHOD

Akustika ◽  
2020 ◽  
pp. 58-66
Author(s):  
Stanislav Žiaran ◽  
Ondrej Chlebo ◽  
Ĺubomír Šooš
Keyword(s):  
Dynamic Load ◽  
Subjective Evaluation ◽  
Objective Evaluation ◽  
Living Environment ◽  
Working Environment ◽  
Subjective Method ◽  
Auditory Organ ◽  
Objective Methodology ◽  
Fft Analysis

The quality of bearing production has an impact not only on their reliability and lifetime, but also on the dynamic load of the working and living environment by excessive vibration and thus also noise. The intensity of the noise emitted by a bearing which is perceived by man characterizes the quality of its production. Reducing the dynamic load of mechanical systems and their components is reflected in the working environment by reducing noise emissions and immissions. The article proposes an objective method of bearing quality assessment based on measuring vibro-acoustic parameters of dynamic load of a new bearing using FFT analysis and the magnitude of the amplitude of bearing vibration acceleration and compares it with a subjective method that also uses the human auditory organ to assess bearing quality. The results of vibro-acoustic measurements were analysed in terms of vibration intensity and the noise of the produced bearings. The proposed objective methodology was compared with the subjective evaluation of the quality of bearings and the results of this methodology matched. The proposed methodology is applicable to all types of bearings, and it is possible to automate this methodology in the production process.

scholarly journals Objective Evaluation of Drivability in Passenger Cars with Dual-Clutch Transmission: A Case Study of Static Gearshift Condition

2020 ◽  
Vol 2020 ◽  
pp. 1-13
Author(s):  
Wei Zhou ◽  
Xuexun Guo ◽  
Xiaofei Pei ◽  
Chengcai Zhang ◽  
Jun Yan ◽  
...  
Keyword(s):  
Fuzzy Ahp ◽  
Subjective Evaluation ◽  
Objective Evaluation ◽  
Dual Clutch Transmission ◽  
Evaluation Tool ◽  
Passenger Cars ◽  
Denoising Method ◽  
Fuzzy Matrix ◽  
Predictability Score

This paper is aimed at the problem that the subjective drivability evaluation by experienced test drivers is limited in time efficiency and is of high cost and poor repeatability. In this article, an intelligent drivability objective evaluation tool (I-DOET) for passenger cars with dual-clutch transmission (DCT) is developed and verified by real vehicle testing. First, the signal denoising method and its key parameters, which are suitable for drivability evaluation, are selected based on analytic hierarchy process (AHP) and technique for order preference by similarity to ideal solution (TOPSIS). Besides, combined with the uncertainty characteristics of subjective judgment, a mathematical model of the objective drivability evaluation FARODE (fuzzy AHP-RS based on objective drivability evaluation) is proposed by using the fuzzy comprehensive assessment (FCA) method. The AHP and rough set (RS) method are used to calculate the subjective and objective weights of the drivability evaluation, respectively, and the proportion of subjective and objective weights is determined by the principle of minimum relative information entropy. The fuzzy matrix is built by membership function of the evaluation indexes. Finally, the static gearshift condition focused on by the subjective evaluation experts is taken as a case study. The predictability score is obtained by combining the drivability quantization lever vector, comprehensive weight, and fuzzy matrix. The experimental results indicate that the proposed method is applicable for objective drivability evaluation in passenger cars with DCT.

scholarly journals The Impact of Urban Recreation Environment on Residents’ Happiness—Based on a Case Study in China

2021 ◽  
Vol 13 (10) ◽  
pp. 5549
Author(s):  
Lei Kang ◽  
Zhaoping Yang ◽  
Fang Han
Keyword(s):  
Low Income ◽  
Subjective Evaluation ◽  
Objective Evaluation ◽  
Income Group ◽  
High Income Group ◽  
Rapid Urbanization ◽  
Indirect Impact ◽  
Negative Effect ◽  
The Impact ◽  
Urban Recreation

Rapid urbanization promotes the expansion of urban tourism and recreation functions, but it also brings many problems, which affect residents’ happiness. Previous studies have emphasized the direct impact of urban recreation environment on happiness, and few have explored the indirect impact of urban recreation environment on happiness through subjective evaluation. Based on the survey data of nearly 10,000 permanent residents in 40 key tourism cities in China, this paper establishes a theoretical framework of the direct and indirect impact of urban recreation environment on happiness. The objective evaluation of natural recreation environment and sociocultural recreation environment has an important influence on happiness, but the influence of natural recreation environment is greater than that of sociocultural recreation environment. Individual subjective satisfaction with urban recreation environment mediates the relationship between urban objective environment and happiness. Urban parks have a positive effect on happiness, while tourist attractions have a negative effect. The influence of urban location on happiness is nonlinear. The high-income group is more sensitive to the recreation environment, while the low-income group is less sensitive to the recreation environment. These findings provide insights for further improving citizens’ quality of life and designing urban construction in developing countries under the conditions of rapid urbanization.

Evaluation of the development ability of medical association based on evidential reasoning and prospect theory

2021 ◽  
pp. 1-18
Author(s):  
Tao Zhang ◽  
Shizheng Li ◽  
Jin Wang
Keyword(s):  
Prospect Theory ◽  
Comprehensive Evaluation ◽  
Risk Attitude ◽  
Decision Makers ◽  
Evidential Reasoning ◽  
Evaluation Index System ◽  
Evaluation Index ◽  
Equivalent Transformation ◽  
Qualitative And Quantitative ◽  
Quantitative Indexes

China has proposed medical couplet body to alleviate residents’ difficulties in seeking medical treatment, and the future development ability of medical couplet body has gradually become a research interest. On the basis of prospect theory, this study constructs a comprehensive evaluation index system with qualitative and quantitative indexes, clear hierarchy, and diverse attribute characteristics. The development ability of medical couplet body is also comprehensively and systematically evaluated. In addition, the evidential reasoning method is proposed on the basis of the equivalent transformation of prospect value. Furthermore, the validity and feasibility of the model are proven through experiments, and the influence of decision makers’ risk attitude on the evaluation results is discussed.

scholarly journals Annoyance evaluation of noise emitted by urban substation

2021 ◽  
pp. 146134842110143
Author(s):  
Li Jun ◽  
Li Li ◽  
Zhang Yongxiang ◽  
Chu Zhigang ◽  
Fan Xiaopeng
Keyword(s):  
Regression Model ◽  
Urban Areas ◽  
Subjective Evaluation ◽  
Noise Pollution ◽  
Objective Evaluation ◽  
Semantic Differential ◽  
Differential Method ◽  
Practical Application ◽  
Noise Evaluation ◽  
Objective And Subjective Evaluation

In China, noise pollution from substations in urban areas is becoming more and more serious. An annoyance evaluation of the noise emitted by urban substations is presented. First, the subjective evaluation is conducted on the noise samples from urban substations via the semantic differential method. Subsequently, according to the typical characteristics of urban substation noise, 14 acoustical metrics are used to describe the noise samples for objective evaluation. Then the correlation analysis and regression analysis between the objective and subjective evaluation results are carried out. Finally, a regression model for urban substation noise evaluation is established. Practical application shows that the regression model can correctly predict the subjective annoyance of urban substation noise.

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