Research Status and Challenges of Key Technologies of Virtual Rail Vehicles
Recent years have seen the development of a new type of rail transportation system based on virtual rail-guided rubber wheels,which has become a research hotspot.As an emerging rail vehicle,virtual rail vehicles face numerous technological challenges.This paper analyzes the research status,technical principles,and future development trend of virtual rail vehicles from four aspects:electronic guidance and virtual rail technology,environment sensing technology,right-of-way allocation strategy,and dynamics-bearing characteristics.The research results show that electronic guidance and virtual rail technology mainly focuses on selecting the optimal control strategy for the steering system on the basis of reliable guidance information.The traditional control strategy is highly reliable,and for the multifactor and multivariable control system,neural network-based control algorithms have greater advantages.However,they still need to be improved in terms of general applicability;Multi-source sensing techniques,such as vision,laser,microwave,etc.,can provide vehicles with a large amount of context-aware information.Redundancy,complementarity and screening of key data are the basis for virtual rail vehicles to sense the context;real-time sensing and high robustness are its goals.Combining the Internet of Things,machine learning and other emerging technologies to establish a more efficient multi-source algorithmic fusion processing may become a research hotspot for context-aware technology;The right-of-way allocation strategy is aimed at improving the passage efficiency of virtual rail vehicles and other vehicles with limited road resources.At present,the real-time dynamic information of vehicles is mainly fed back to the traffic signal control platform in order to carry out data mining of the passage information of virtual rail vehicles,road information,environmental information and travel pattern information,and provide further optimization space for the right-of-way allocation strategy;Due to the novelty of the virtual rail vehicle structure,a multi-body dynamics model based on wheel-ground coupling,electromechanical coupling,and vehicle-vehicle coupling is proposed,and the vehicle operational performance,control strategy matching relationship,and structural parameter optimization are examined.The coupling relationship and sensitivities of the system require further consideration.
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维普
