Speed time lag feedback control method of traffic flow following model

A car-following model and feedback control technology, applied in traffic control systems, road vehicle traffic control systems, traffic flow detection, etc., can solve the problems of low accuracy of time-delay interval calculation results and unstable time-delay interval.
CN111341104AActive Publication Date: 2020-06-26BEIJING INSTITUTE OF TECHNOLOGYGY
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
BEIJING INSTITUTE OF TECHNOLOGYGY
Publication Date
2020-06-26

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Abstract

The invention discloses a speed time lag feedback control method of a traffic flow following model, and belongs to the field of traffic flow control. According to the invention, a classic optimized speed following model is established under a traffic flow system, and the stability of the optimized speed following model is determined; a classic optimized speed following model is improved through aspeed time-delay feedback control method, and the stability condition of the improved following model containing time-delay feedback control items is determined in combination with the principle of control science; the method further includes determining a value range of a feedback gain coefficient; solving a corresponding stable time delay interval according to a stability switching principle ofa time delay differential equation and a definite integral stability analysis method; designing a controller according to the feedback gain coefficient and the stable time delay interval, enabling theunstable parameter combination of the optimized speed following model to become stable, thus expanding the stable parameter combination interval of the original optimized speed following model, improving the stability of the following model, inhibiting the traffic jam, improving the traffic travel efficiency and the traffic resource utilization rate, and improving the stability of a traffic flowsystem effectively.
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Description

technical field

[0001] The invention relates to a traffic flow control method, in particular to a speed time-lag feedback control method of a car-following model of traffic flow, and belongs to the field of traffic flow control. Background technique

[0002] The car-following model is a dynamic system composed of a large number of vehicles, which has dynamic characteristics such as multi-parameters, coupling, nonlinearity, and uncertainty. Its modeling and automatic control problems are very complicated. At present, the more effective control method is to add the time-delay feedback control item to the right end of the car-following model to improve the stability of the uniform flow of traffic and achieve the purpose of suppressing traffic jams.

[0003] The asymptotic stability of traffic flow is related to any fluctuation in vehicle motion and the propagation of a series of fluctuations in vehicle behavior. The adaptive cruise control system can collect the distance and s...

Claims

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