The precise and accurate control of the friction between tire and road is the foundation of the vehicle driving conditions furthest utilization and vehicle dynamics control. First the tire/road longitudinal and latera...The precise and accurate control of the friction between tire and road is the foundation of the vehicle driving conditions furthest utilization and vehicle dynamics control. First the tire/road longitudinal and lateral dy- namic friction characteristics is studied in this paper. The lumped, distributed and lumped average dynamic tire models are established; Then the steady-state LuGre dynamic tire model characteristics is studied and was com- pared with magic formulas tire model, etc. to verify the reliability of the model. The results showed that the LuGre model can express tire dynamic friction characteristics. The tire dynamics study in this paper has impor- tant significance for the tire mechanics and automotive electronic control system development.展开更多
Based on the understanding of agricultural products, transportation sites and transportation market, this paper puts forward the concept of agricultural product logistics system, and discusses the background of the sy...Based on the understanding of agricultural products, transportation sites and transportation market, this paper puts forward the concept of agricultural product logistics system, and discusses the background of the system and provides recommendations for subsequent protection. Through the research of this paper, we explore the development countenneasures of agricultural products logistics under the background of low-carbon economy to guide the development of agricultural products logistics, improve the economic benefits of agricultural products, promote agricultural development and farmers＇ income. Finally, the paper discusses the optimization of economic and social environmental benefits, which will contribute to the construction of new socialist countuside in Henan province.展开更多
基金supported by Henan Polytechnic University Doctoral Fund under Grant No.B2010-12the natural science fund of Henan province education department under Grant No.2011B580001Henan Province Key Technology Research Project under Grant No.122102210045
文摘The precise and accurate control of the friction between tire and road is the foundation of the vehicle driving conditions furthest utilization and vehicle dynamics control. First the tire/road longitudinal and lateral dy- namic friction characteristics is studied in this paper. The lumped, distributed and lumped average dynamic tire models are established; Then the steady-state LuGre dynamic tire model characteristics is studied and was com- pared with magic formulas tire model, etc. to verify the reliability of the model. The results showed that the LuGre model can express tire dynamic friction characteristics. The tire dynamics study in this paper has impor- tant significance for the tire mechanics and automotive electronic control system development.
基金supported by Key project of Henan Provincial Education Department(SJDZXYB-18)
文摘Based on the understanding of agricultural products, transportation sites and transportation market, this paper puts forward the concept of agricultural product logistics system, and discusses the background of the system and provides recommendations for subsequent protection. Through the research of this paper, we explore the development countenneasures of agricultural products logistics under the background of low-carbon economy to guide the development of agricultural products logistics, improve the economic benefits of agricultural products, promote agricultural development and farmers＇ income. Finally, the paper discusses the optimization of economic and social environmental benefits, which will contribute to the construction of new socialist countuside in Henan province.
