Research On Self-switching Of Multiple Driving Modes

With the development of society,technological innovation,the functions that automobiles can achieve are becoming more and more diverse,but vehicles also cause energy shortages and environmental pollution.Multi-driving mode has been common for a long time,but it has not fully exerted its functions.If the driving mode can be automatically switched,it will bring more benefits in driving experience and fuel economy.The research content of this article is the intelligent driving mode switching system,which mainly includes four aspects: road environment and driving scene recognition,classification and recognition of driver style,vehicle dynamics model and driving conditions,multi-drive mode,multi-drive mode Design of switching strategy.Road environment and driving scenarios are the basis of switching driving modes.In this paper,by constructing a dynamic driving index combined with logical thresholds,the road environment and driving scenarios can be identified and verified in the switching of driving modes.Drivers of different styles have different degrees and timings of switching driving modes,and classifying and recognizing driver styles is the focus of multiple driving modes.In this paper,multi-dimensional data that can characterize the driver’s style is obtained by designing a road test.After preprocessing,principal component analysis is performed,and the basis of principal component classification is reliable.Classify driving styles based on k-means clustering.Use the driver’s acceleration,steering,braking and other actions to identify the driver’s style.Based on Carsim,the vehicle dynamics model is built and the driving conditions are built.By analyzing the vehicle’s power and fuel economy through the full-speed acceleration of 1km,an initial multi-drive control strategy is established,and the optimization of this control strategy is made.Establish a multi-drive mode control strategy,and build a model and Carsim joint simulation in Simulink to verify the mode switching control strategy,and analyze the fuel economy under the scenario of automatic driving mode switching,and improve the fuel economy under the mode of independent switching.