Control method and system for improving passing efficiency of narrowed road section
What is Al technical title?
Al technical title is built by PatSnap Al team. It summarizes the technical point description of the patent document.
A technology of traffic efficiency and control method, which is applied in the traffic control system of road vehicles, traffic control system, traffic flow detection, etc., and can solve the problems of inability to perform lane change control and limited control effect
Active Publication Date: 2020-06-19
TSINGHUA UNIV
View PDF8 Cites 15 Cited by
Summary
Abstract
Description
Claims
Application Information
AI Technical Summary
This helps you quickly interpret patents by identifying the three key elements:
Problems solved by technology
Method used
Benefits of technology
Problems solved by technology
The former does not fully consider the fact that there will be a large number of vehicles forced to change lanes at the bottleneck of the narrowed road section, resulting in limited control effects; while the latter ignores the difference in r...
Method used
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more
Image
Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
Click on the blue label to locate the original text in one second.
Reading with bidirectional positioning of images and text.
Smart Image
Examples
Experimental program
Comparison scheme
Effect test
specific Embodiment approach
[0052] In this embodiment, the narrowing road section of the highway, such as figure 1 As shown, one or several lanes are impassable due to traffic accidents, road construction, or vehicles occupying the road, and the number of traversable lanes on the road decreases. Due to the narrowing of the road, it often leads to large-scale and long-term traffic jams, resulting in traffic paralysis. This embodiment mainly solves how to improve the efficiency of road traffic in the case of road narrowing. Its specific implementation is as follows:
[0053] This embodiment provides a control method for improving the traffic efficiency of narrowed highway sections, such as figure 2 shown, including the following steps:
[0054] S1. Record and calculate the average speed, flow and traffic density of various types of vehicles in each road section and each lane obtained at each sampling moment;
[0055] S2. Based on the Multi-Class CTM model, combined with the speed limit of different la...
Embodiment 2
[0107] Based on the same inventive concept as that of Embodiment 1, this embodiment provides a control system for improving the traffic efficiency of road narrowing sections, including:
[0108] The acquisition and calculation module is used to record the average speed, flow rate and traffic density of various types of vehicles in each road section and each lane obtained at each sampling moment;
[0109] The model building module is used to establish a traffic flow prediction model based on the speed limit of different lanes and the number of vehicles changing lanes, and use the collected measurement values as the initial conditions for predicting the future dynamics of the system at this time;
[0110] The finite time domain optimization problem establishment and solution module establishes the objective function and constraint conditions, based on the traffic flow prediction model, forms an optimization problem about the future finite time domain, and uses the optimization ...
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more
PUM
Login to view more
Abstract
The invention relates to a control method and system for improving the passing efficiency of a narrowed road section. The control method comprises the steps: S1, the average speed, the flow and the traffic flow density, obtained at each sampling moment, of various types of vehicles in various lanes of various road sections are recorded; S2, a traffic flow prediction model is established on the basis of a Multi-Class CTM model and in combination with the number of vehicles for speed limiting and lane changing of different lanes, and a measured value serves as an initial condition for predictingfuture dynamic conditions of traffic by the prediction model; S3, based on the traffic flow prediction model, an objective function and constraint conditions of an optimization problem are established, and a finite time domain optimization problem is solved; and S4, the first element in the optimization problem solution sequence acts on the controlled object based on a rolling optimization framework of model prediction control, the next sampling moment is entered, and the steps are repeated until the whole sampling time period is completed. According to the scheme, the application speed and the traffic state change between different lanes within limited time after lane changing control are predicted, and the prediction precision is improved.
Description
technical field [0001] The invention relates to a control method and system for improving the traffic efficiency of narrowed highway sections, and belongs to the field of dynamic traffic control. Background technique [0002] With the rapid development of unmanned driving and intelligent network technology, the vehicle itself not only has the function of automatic driving, but also can communicate with other vehicles and control systems in real time. Through unmanned driving and intelligent network technology, it is not only possible to obtain full-time traffic information, but also to carry out coordinated control of all vehicles on the road, thereby greatly improving traffic efficiency. The above-mentioned advantages are especially obvious in the control of the narrowing section of the expressway. Due to factors such as road design, traffic accidents, and road construction, there are often road sections with reduced number of lanes on expressways. In these road sections,...
Claims
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more
Application Information
Patent Timeline
Application Date:The date an application was filed.
Publication Date:The date a patent or application was officially published.
First Publication Date:The earliest publication date of a patent with the same application number.
Issue Date:Publication date of the patent grant document.
PCT Entry Date:The Entry date of PCT National Phase.
Estimated Expiry Date:The statutory expiry date of a patent right according to the Patent Law, and it is the longest term of protection that the patent right can achieve without the termination of the patent right due to other reasons(Term extension factor has been taken into account ).
Invalid Date:Actual expiry date is based on effective date or publication date of legal transaction data of invalid patent.
Login to view more 
Login to view more