Study Of Speed Control Inducement Technology In Mountainous Highway And Wide Area Application

In order to solve the problem that the vehicle is out of control because of over-speed in mountainous area highways, this study aimed at the particularity of current situation of traffic safety for the mountainous area highways. Under the Inducement of system thinking, this study researches on the speed control Inducement technology based on the combined operation of DVR (Driver-Vehicle-Road and environment). This study will become the basic way of eliminating the phenomenon of over-speed driving and avoiding the happening of serious traffic. Therefore, it has important significance and practical value to improve the condition of traffic safety for mountainous area highways.For the purpose of improving the safety operation for mountainous area highways, this study develops the safety and efficient speed control Inducement system using the methods of investigation, system analysis, road test, dynamics modeling and simulating, and multiple target optimizing. This study puts into practical application and achieves good economic and social benefits. The main works completed are as follows:Through the analysis of influencing factor of driver speed control, this study design the survey scheme of speed control device based on enhancing the ability of speed control Inducement. Then, this study does the questionnaire survey of behavior and psychology of speed control when180experienced drivers meet with road humps. According to the conclusion of questionnaire survey, this study builds the speed control Inducement system which has the function of speed control Inducement using isomorphism theory and Hall three-dimensional structure. This system consists of core elements and subordinate elements by the specific structures of information flow. The core elements are speed control device. The subordinate elements are prepositive alarming signals, the warning message of speed control device, speed control Inducement message of optical illusion. Through the effect of negative feedback and interior cooperation force, this study achieves the optimization of the system by the promotion of fluctuation strength. Therefore, this study satisfies with the need of the overall speed control, full speed control and reliable speed control, and solves the systematic problems of speed control of dangerous sections in mountainous expresswayBased on the survey of the speed control psychology and the analysis of the system requirements, this study puts forward the evaluation indexes of speed control Inducement system using the target multi-resolution decomposition method. According to cognition theory of subjectivity and objectivity, shock dynamics of vehicle, and dynamics theory of speed control effect. This system includes availability of speed control, application safety, and manufacture economy which are primary evaluation index.Against the particularity of the contact process of vehicle and speed control device, this study puts forward the computation model of effective road shape, and achieves the method of analysis and solution. According to the structural characteristics of vehicle suspension and the analysis of vibration characteristics, this study gets the suspension model of piecewise linearity. Based on the effective road incentives and the suspension model of piecewise linearity, this study builds the5-DOF and nonlinearity shock dynamical model of speed control device. Through selecting the response of random vibration to be initial value, this study develops the simulation software of the vibration of the speed control device. In order to verify the validity of vehicle dynamical model, this study does the real road trial. Through the comparison between test and simulation, the results indicate the shock dynamical model is valid, the model can be used the simulation calculation of vehicle vibration under the condition of pulse input. The calculation result can put forward the data support for multiple targets optimization of speed control device.According to the evaluation indexes of speed control Inducement system, this study builds the nonlinear and discrete multiobjective optimization model of the speed control device structure based on the simulation calculation. The targets are vehicle impact strength, speed control Inducement force and manufacture economy, and the decision variables are height, width and section shape. The result is that the trapezoid is the best section shape of the speed control device. At the same time, this study simplifies the multiobjective optimization model, then deals with the model using dimensionless method and achieves standard multiobjective model. The "pareto" optimal solution of multiple targets optimization is gotten using the linear weighting method and efficacy coefficient method. This study solves the conflicting problem among the availability of speed control, application safety, and manufacture economy for speed control device.According to the evaluation indexes of speed control Inducement system, composition structure and force analysis of road surface structure, this study puts forward the optimal setting space, optimal installment scheme, optimal figure forms of the surfaces and the optimal setting position of prepositive alarming signals. This study does the application and dissemination for the speed control Inducement system. The result indicates that the speed control Inducement system can make the obvious improvement effect for traffic safety of mountainous highway...