Fuzzy control based automotive intelligent cruise assisted driving system control method

Abstract

The invention discloses a fuzzy control based automotive intelligent cruise assisted driving system control method. The method includes the steps: firstly, acquiring speed VF of a front key target vehicle, relative distance Sr and real-time speed Vh of a cruiser; judging whether the front vehicle exists or not, and entering an intelligent following mode if yes; otherwise, entering a constant-speed cruise mode; for the intelligent following mode, taking relative distance deviation RD and relative speed deviation RV as input parameters, and taking an output linguistic variable as pedal increment u of an accelerator pedal or brake pedal at one movement; according to the fuzzy rule, determining a fuzzy value of an output variable u; adopting a centroid method to perform defuzzification computation to obtain an accurate controlled variable so as to control throttle percentage or brake pedal travel. By the control method, automatic regulation and trigger control of the throttle percentage and brake pedal travel can be realized at the same time, an integrated control function integrating ACC(active cruise control) and run-stop control can be realized, running safety of an automobile is improved, and driving fatigue of a driver is alleviated.

Description

technical field [0001] The invention relates to an automobile intelligent cruise auxiliary driving control technology, in particular to a control method for an automobile intelligent cruise auxiliary driving system based on fuzzy control. Background technique [0002] The rapid economic development promotes a sharp increase in the number of cars, which brings convenience to people but also produces many negative effects. The most obvious thing around us is that no matter in big cities or small and medium-sized cities, the duration of the peak period of traffic flow is obviously prolonged, traffic congestion is commonplace in people's minds, people's travel environment is getting worse and worse, traffic friction and traffic conflicts Phenomena such as occur from time to time, the rate of traffic accidents also increases obviously thereupon, seriously threatens the safety of human life. Therefore, people urgently need to improve or enhance the driving safety of automobiles a...

AI Technical Summary

Problems solved by technology

[0003] Looking at the research status and progress of automobile cruise control at home and abroad, although the automobile ACC system has been fully developed, it still needs to be strengthened in some aspects, mainly reflected in: the research and development of ACC system is mainly aimed at high-speed Vehicles running at high speeds on highways (vehicle speed greater than 40km / h) are not suitable for use in cities with low and medium speeds, frequent lane changes, stop-and-go and high-density traffic conditions

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