The Kane-Huston is adopted in this paper to build the topological structure for the working device of hydraulic excavator. And the virtual prototyping model of the working device is built by the virtual prototype analysis software. Through analysis of the mechanical properties of working device on real working condition and comparing the inverse dynamics gotten by the Kane-Huston with that gotten by the virtual prototype model in software, the correctness of the dynamic equations from the Kane-Huston is verified. Finally, fuzzy control method is used for the optimization of bucket tip trajectory and it has good control effect in the software simulation environment.
Understanding the effect of built environment on travel behavior has been an important research issue in transportation, geography, and urban planning. Geographic scales for travel behavior research have started attracting attentions in recent years. In this research, we proposed a method to extract suitable geographic scales of built environment influence on travel behavior with different travel purposes. We designed a modeling framework to examine different types of corresponding scales that affect the relationships between travel behavior and the built environment. The scale-correspondence covers the aspects of geography, model, and indicators. In a real travel data supported case study, the results show a stronger and more explainable influence from built environment on travel distance and travel mode choices at scale-corresponding models than that with the non-scale-corresponding models. We discovered that all three types of scale correspondence can reduce the geographic-contextual uncertainty in both travel and built environment contexts. The results of this study offer methodological insights that may facilitate further research investigating travel behaviors.
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