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Method for simulating T-CPS based on Modelica

A technology of traffic information and physical systems, which is applied in the field of traffic information-physical systems and computer simulations, and can solve problems without in-depth research on traffic information-physical systems

Inactive Publication Date: 2014-08-06
BEIJING UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, these studies only stop at interpreting the functions of the corresponding modules and some key technologies involved. Although they provide theoretical support for the development of the next generation of intelligent transportation systems, they do not have a comprehensive understanding of the traffic information physics in terms of computer simulation. In-depth research on the system, and CPS-oriented system modeling and simulation is one of the basic technologies for studying CPS

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  • Method for simulating T-CPS based on Modelica
  • Method for simulating T-CPS based on Modelica
  • Method for simulating T-CPS based on Modelica

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Embodiment Construction

[0143] The present invention selects a small part in the verification area of ​​the 863 topic "Key Technology of Cooperative Linkage Control in Metropolitan Areas" as the test area, such as Figure 9 As shown, firstly, according to the actual road network, it is modeled and simulated according to the component library designed by the present invention.

[0144] (1) Analysis of the road network system: 4 intersections, 8 entry lanes corresponding to 8 source cells, 8 exit lanes corresponding to 8 sink cells, a total of 24 intermediate cells, 16 traffic lights, 4 Signal light controller, set 8 vehicle detectors.

[0145] (2) According to the first step of the system analysis corresponding to the components in the model library, create a new model (model), extract the relevant components into the model on the component view, set the initial parameters, and connect. model such as Figure 10 shown.

[0146] (3) Set the simulation termination time to 300s, the output file format ...

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Abstract

The invention discloses a method for simulating a T-CPS based on the Modelica and belongs to the field of T-CPSs and the computer simulation technology. According to modeling and system verification of the T-CPS, modeling is performed on physical and information process, and a simulation system platform is constructed by means of the Modelica. By means of rich assembly mechanisms of the system platform, a large-scale complicated system model can be constructed. By means of various interface mechanisms, interfaces between an information part and a physical part and interface attributes can be defined flexibly. The Modelica has capability of describing a discrete hybrid system so that the problem of concurrency and synchronization during simulation process of the system can be solved. Therefore, by means of the method, technical support is provided for verification of hardware and software and system evaluation in future.

Description

technical field [0001] The invention belongs to the technical field of traffic information physics system (also called traffic control internet of things) and computer simulation, and specifically relates to a method for modeling the information physics system in the traffic field with Modelica language and its simulation verification method. Background technique [0002] Transportation informatization and intelligence have become the main development direction of the modernization of the transportation system in the world, and it is the frontier field of contemporary science and technology. The transportation system is essentially a non-linear, strongly coupled, pan-temporal complex system. In recent years, the emergence of CyberPhysical Systems (CyberPhysicalSystems, CPS, also known as the control Internet of Things) theory and technology has provided a basis for the perception, calculation, communication and control of traditional transportation systems. It provides a new...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F17/50
Inventor 陈阳舟张二青罗江李伟石建军代桂平
Owner BEIJING UNIV OF TECH