CN102710582A - Expandable distributed system supporting large-scale microscopic traffic simulation - Google Patents
Expandable distributed system supporting large-scale microscopic traffic simulation Download PDFInfo
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Abstract
The invention relates to an expandable distributed system supporting large-scale microscopic traffic simulation, and the system is characterized in that an Agent technology is combined with the high level architecture (HLA) technology, a simulation entity Agent is correspondently generated through a simulation entity generation server according to a traffic flow distribution status model and a traffic entity behavior model, and the simulation entity Agent is included into a corresponding regional management Agent; and each region in the Agent is coordinated. The Agent performs the time synchronic management through a real-time interface (RTI) of the HLA, and evidence can be provided for the evacuation of different traffic disasters, the traffic commanding and establishment and estimation of specification decision through the simulation. Meanwhile, the simulation effect can be displayed in real time through a display module, and the simulation system module is clear and has customizability, expandability and flexibility. By combining the Agent technology with the HLA technology, the distributed simulation system can efficiently and quickly realize the simulation of a microscopic traffic.
Description
Technical field
What the present invention proposed is a kind of system of simulation technical field, is a kind of scalable distributed system that supports extensive microscopic traffic simulation specifically.
Background technology
Along with traffic complex degree before the city sharply increases, solve real traffic problems and often need drop into substantial contribution, there are many unsafe factors in operation in actual environment simultaneously, and this makes the difficulty of seeking prioritization scheme strengthen, and is even unfeasible.At this moment, Applied Computer Techniques carries out the effective technology means that traffic simulation becomes the transport solution problem.Its appearance can reappear the traffic flow change in time and space, and raised path between farm fields is traffic rule so that various parameters are compared and estimate: draw, the emergence treatment scheme of point duty and emergency traffic situation provides important decision-making foundation.
The operand of traffic simulation is very big, and the situation that the centralized simulated environment of tradition can only analogue simulation negligible amounts crossing has satisfied not the situation that comprises hundreds and thousands of crossings road network traffic flow far away.Because current Distributed Simulation environment can be worked in coordination with just and provided high performance computational resource to accomplish the complicated calculations task, therefore, utilize the demand that can adapt to current complicated traffic simulation based on the Dynamic Simulation Technology of dividing one hundred formula well.
At present.The U.S., Britain, Germany, Japan and other countries have been done considerable research aspect traffic simulation software.Through analyzing domestic and international typical traffic simulating system such as CORSIM; CONTRAM; CORFLO, though each analogue systems of discovery such as PARA MICS occupy some advantages in some aspects more or less, basic side is to single research purpose and copying; Be confined to some sides of simcity traffic system, some parts, can not satisfy the needs of intelligent transportation development well comprehensive emulation platform.Therefore; For the adaptability, the flexibility that fundamentally solve the comprehensive traffic analogue system, breathe out autgmentability and reusability; Research and develop an opening with the mode of combination, can adaptive technique and the continuous traffic comprehensive simulating architecture system of development of demand, be important trend that traffic simulation develops.
Summary of the invention
The objective of the invention is to overcome the deficiency that current emulation mode technology is foretold, a kind of scalable distributed system that supports extensive microscopic traffic simulation is provided.The present invention adopts current Agent (in network, having autonomy, perceptibility, ambulant software entity) technology and HLA (high-rise simulation architecture) technology to combine; Make it can under distributed environment, provide a kind of collaborative; Flexibly, analogue system that can be customized solves the great demand of computational resource in the current microscopic simulation; Simulation architecture does not possess the problem of flexibility, extensibility, promotes the development of traffic simulation technology and field of traffic.
The present invention realizes through following technical scheme, the present invention includes: synchronization server, district management server, traffic entity emulation server, traffic entity model library server, traffic flow distribution mould are pulled, and storehouse server, disaster are evacuated model and commander's model library server, traffic entity produces server, emulation display terminal.Traffic entity produces server and is responsible for dynamically producing traffic entity according to traffic flow distributed model in the traffic flow distribution model library server and the traffic entity model in the traffic entity model library server; And join them in the corresponding traffic entity emulation server and to carry out entity emulation, coordinate communication between the traffic entity of this simulating area with mutual by the district management server simultaneously; Administrative unit in each traffic zone management server realizes that through synchronization server the emulation of each simulating area is synchronous.Adopt X-Y scheme and 3-D graphic dynamically to show the real-time simulation situation in the traffic simulation environment through the emulation display terminal at last.
Said synchronization server is the lock unit in the system; Lock unit mainly is responsible for the time synchronized co-ordination between each simulating area and the display module; All simulating area are through advancing request to the lock unit request time; After lock unit is received all synchronization request,, ask propelling when allowing each imitative soldier zone to carry out through callback method according to the different time strategy.
Said district management server comprises: the unit of communicating by letter with synchronization server, service logic computing unit, the unit of communicating by letter with traffic entity.It mainly is responsible for the coordination of little simulating area and reaches relevant logical calculated synchronously.The time that the unit of communicating by letter with synchronization server mainly is responsible for carrying out in the time synchronized with synchronization server advances the time of asking and accepting in the synchronization server to advance the request of permitting of transferring of crying.The service logic computing unit mainly is responsible for the calculating of the traffic of institute management area, such as current traffic flow situation is sorted out, and when the traffic entity generation area is changed, the co-ordination between each management server.Mainly be responsible for collecting the state information of each traffic entity with the communication unit of traffic entity, simultaneously, each traffic entity sent out environmental information big in time ask synchronizing information.
Said traffic entity emulation server wherein comprises the simulation object of various traffic entity, adopts Agent to describe, such as car, and people, various traffic entity such as signal lamp.Various traffic entity are described the behavior and the attribute of various traffic entity according to the physical model of correspondence, simultaneously, and according to the next behavior of traffic environment information independence decision oneself and the modification of property value.
Said traffic entity model library server wherein comprises the model of various traffic entity, such as the model of different motor vehicles, and pedestrian dummy, signal lamp model, bicycle model, Autobike Mode, road conditions display panel model etc.Various models are portrayed and are described the rule of conduct of various traffic entity.This model library is through to the traffic entity information description and carry out that repeated validation is abstract to be obtained.
Said traffic flow distribution model library server, comprising the probabilistic model of the traffic flow distribution of each traffic zone, this model library is that the historical data statistical analysis through traffic flow obtains.
Said disaster is evacuated model and commander's model library server, sums up the not comprovincial point duty model that is directed against that draws comprising the evacuating personnel model of locality under the various disaster scenarios such as fire, chemicals leakage and various large-scale guard duty and big assembly time.
Said traffic entity produces server, comprising the traffic entity generation unit.Traffic entity is produced Niu Danyuan and the traffic entity quantity of accord with probability distributed model according to the traffic flow distribution in the traffic flow distribution model library and the pairing physical model of traffic entity that will produce, and sends in the corresponding simulating area.
Said emulation display terminal comprises: administrative unit and display unit.Administrative unit can selectively show that concrete artificial intelligence is to graphical interfaces according to user's demand; Simultaneously can select different display modes; Such as block diagram equal proportion information, Word message, can also show the graphical interfaces of the dynamic operation of traffic entity according to two dimension or three-dimensional form.Display unit mainly is responsible for accepting the order of administrative unit and traffic entity information that each simulating area sends dynamically shows.
Each server of the present invention is in the distributed environment, can pass through local area network interconnection, and is also can wide area network interconnected, and follows the uniform communication agreement, can intercom mutually and exchange message.When the traffic microscopic simulation begins; At first start the firm step unit in the synchronization server; Start the application program of application program and emulation display terminal in each district management server then; The adding method of the lock unit in each routine call synchronization server joins in the synchronous environment; Start traffic entity at last and produce the traffic entity generation unit in the server; This unit reads traffic branch and the traffic entity model in probabilistic model and the traffic entity model library server in the server of traffic flow point rent land state model storehouse through the subscriber simulation demand, generates the traffic entity of the specific quantity of corresponding distributed model, corresponding flexible physical model, and makes it to join in the corresponding management area through the sign of specifying corresponding district management server and corresponding program.The traffic simulation display terminal shows simulation result according to the information real-time of sending from each imitative its zone.In process of simulation, traffic control center district management server reads the corresponding model in disaster evacuation model and the commander's model library server according to emulation user's demand, and each police's entity issued is commanded information accordingly.
The present invention can effectively realize the emulation effectively accurately of microcosmic traffic, and it is directly perceived to have user interface again simultaneously, the needed simulating area of user customizable and emulation emphasis and display mode; It is compatible good to have; Extensibility is strong, very strong flexibility, simulated effect obvious characteristics.System of the present invention combines with the Agent technology through adopting the HLA technology, adopts Agent to realize the traffic entity behavior model is portrayed, and cuts synchronous when adopting the RTI (run time infrastructure) of HLA that global simulation is carried out simultaneously.Traffic entity comprises the people, car, road, signal lamp, traffic control center, traffic police, various traffic entity such as road conditions display panel.Through abstract modeling is carried out in various traffic entity behaviors; Deposit in traffic entity behavior model storehouse; Simultaneously carry out abstract modeling to the left alone without help state of the branch of traffic flow, deposit in the traffic flow distribution model library, the traffic entity generator generates corresponding traffic entity Agent through the description behavior in the traffic entity behavior model storehouse according to traffic distribution dynamic real-time; And join in the corresponding simulating area, thereby according to next step behavior of traffic environment information independence decision.Owing to adopt distributed simulated environment, system emulation efficient is high, and the user is simple to operate simultaneously, need not relate to the details operation of emulation, only need on the interface, dispose relevant parameters and then can.
The present invention proposes a kind of extendible Agenc and combine with the HLA technology and carry out the traffic model of emulation, is core with this model, the pattern that adopts distributed system and traffic zone is divided, and realizing that analogue system is distributed carries out.In this model, through inner embedded ambassador RTI of Agent and federal member ambassador as member variable, thereby realize with RTI between communicate by letter, this communication of wafing comprises that request time advances and in time asks and advance the function that withers that returns that obtains permitting.Through above method, realize the time synchronized of different simulating area.
The present invention proposes a kind of modular simulation architecture, realize that traffic entity generation module, emulation module and traffic flow distribution are separated, and realize the flexibility of simulated effect.In simulation architecture of the present invention, adopt the generation module and operation module independent of flexible artificial physical Agent, thereby make the responsibility and the function clear and definiteization of each module of simulation architecture.If the emulation user need need be optimized improvement to the behavior model of artificial physical, then only need make amendment and then can simulation model library.During the state, if when the traffic flow distribution of different traffic zones changes, only need to revise traffic flow distribution model then can, dynamically produce artificial physical by the traffic entity generator according to traffic flow modes distributed model and physical model.
The present invention proposes a kind of simulation frame of customizability, then can carry out the emulation of respective regions to different simulated environment and feature selecting suitable parameters.Analogue system of the present invention has customizability; Because the top modular construction of mentioning; When handling different simulating area or simulation type; Only need portray modeling and take out this regional traffic flow modes distributed model, then can carry out emulation this zone according to the behavioural characteristic of the traffic entity of specific region.
Characteristics of the present invention and effect: 1) high efficiency and distributivity: the present invention adopts the analogue system of branch gal formula; Can carry out real-time load scheduling to the real-time loading condition of emulation; Realize the parallelization of emulation, thereby improve the efficient of emulation: 2) flexibility and can customized property: owing to adopt the independent in traffic entity behavior model storehouse, then as long as through the corresponding model library of configuration; Then can carry out customizedly to different simulation scenarios, have stronger flexibility; 3) versatility of analogue system: the present invention has very strong versatility, as long as through customized not firm physical model, portion can bring in the place near the steps simulation frame; 4) system has very strong extensibility, adopts distributed system because this cries, and this system has versatility simultaneously, therefore, can expand computing node required in the emulation dynamically according to the complexity of emulation, thereby reach the requirement of emulation.
Description of drawings
The interaction figure of figure l traffic entity and zone manager
Fig. 2 is the traffic model figure of Agent and RTI in the simulation model
Fig. 3 is the interaction figure between system's main modular
Fig. 4 is the synchronization scheme between each simulating area of system
Fig. 5 is the overall architecture sketch map of system
Embodiment
System of the present invention is a platform with microcomputer and high-performance computer, adopts HLA to combine with the Agent technology, and main process is following:
(1) traffic entity model library server is through taking out the parameter of various traffic entity behaviors; Find out their general character; And repeated validation, deposit in the final information of confirming in the database, through this method; Make that emulation is the traffic entity characteristic that only needs to upgrade zones of different, then can be repositioned onto new traffic simulation zone to emulation.
(2) traffic flow distribution model service device is through the traffic flow distribution probability model in abstract each traffic simulation zone; And deposit in each parameter information in the database; Through the place near the steps method; Only need upgrade the traffic flow distribution characteristics model of zones of different when making emulation, then can be repositioned onto new traffic simulation zone to emulation.
(3) disaster is evacuated model and commander's model library server; Wherein the Personnel evacuation strategy of various fiery difficulties such as fire, chemicals leakage and locality is carried out abstract modeling and deposits in the database, and sum up when various large-scale guard duty and big assembly draw to not comprovincial point duty model.When depositing into capable emulation, carry out emulation relatively through choosing different strategies, thereby make the decision-making of optimization.Also sting simultaneously with through formulating different strategies, verify that through emulation the strategy of holding is deposited in the model library.
(4) traffic entity produces server and only need read the model in traffic flow distribution model service device and the traffic entity model library server; The traffic entity Agent that produces respective amount and characteristic according to model then can; Through independent the entity generator; Make and can customized property be enhanced the extensibility of analogue system.
(5) simulating area is divided; Each simulating area is coordinated Agent by one and is in charge of and coordinates, and in the present invention, mainly adopting with the highway section is dividing unit; Agent is coordinated in each highway section or corresponding one an of zonule; The pairing traffic entity Agent ownership of traffic entity (bicycle, pedestrian, car etc.) all on the highway section should be coordinated the Agent management; Each traffic entity Agent is through coordinating the information such as position, speed, direction that Agent reports self, coordinates Agent simultaneously and collects the information of the traffic entity Agent of all administrations as environmental information and adopt the mode of broadcasting to send to the traffic entity Agent in all compasses of competency.Communication between them adopts ACL (Agent communication language) to realize; As scheme shown in the l; Simultaneously; Command centre is directly following other regional coordination Agent communicating through ACL (Agent communication language) in the step at the same time, sends to each zone to read a letter breath, commander's police information of signal lamp shape, obtains overall traffic environment information through each coordination Agent simultaneously.
(6) entire environment is undertaken synchronously by RTI, and other federal members come RTI is operated and calls through ambassador RTI.Each is coordinated Agent and carries out time synchronized through RTI; Implementation realizes communicating with RTI through an embedded federal member ambassador and ambassador RTI in coordinating Agent; Coordinate Agent and join in the middle of the whole federation with the identity of federation through calling the federal member ambassador, each time step advances requesting method to come request time to advance through the time of calling ambassador RTI, after RTI obtains all propelling requests of coordinating Agent; When allowing, the callback method through each federal member ambassador asks propelling; Whole process is carried out repeatedly, finishes up to emulation, and is as shown in Figure 2.
(7) when starting the traffic microscopic simulation; The artificial physical generator according to the subscriber simulation demand through reading the traffic flow distributed model of traffic flow point in cloth state model storehouse; The entity behavior of reading in the traffic entity model library according to this model then produces the traffic entity Agent of respective numbers and characteristic, and joins in the corresponding simulating area and go; Process is as shown in Figure 3:
(8) in the process of traffic simulation, the unified time advance mechanism is adopted in imitative its zone of each traffic, process following: beginning RTI coordinates the federal member ambassador among the Agent through asking accent method notice; Then coordinate the information of all traffic entity that Agent broadcasting administered this moment and give each traffic entity Agent, issuing time advances order simultaneously, after each traffic entity Agent time of receiving advances order; Independently carrying out behavior according to the flexible environmental information that receives calculates; And do corresponding action (as push ahead 0.5 meter etc. action), report self information to coordinating Agent the back that is finished, after coordinating Agent and receiving all traffic entity Agent information; Ask RTI to carry out the propelling of next one time through ambassador RTI; After RTI receives that All Ranges advances request, allow the propelling of next time step, so repeatedly; Till emulation finishes, as shown in Figure 4.
(9) whole analogue system is as shown in Figure 5.All coordination Agent and display modules carry out time synchronized through RTI; Just each simulating area is carried out synchronously through RTI; Artificial physical generator (Agent generator) reads the traffic flow distribution probability model in the traffic flow distribution according to the subscriber simulation demand simultaneously, from the traffic entity model library, reads satisfactory traffic entity model, produces individual features and quantity traffic entity agent; And through specifying the identification information of corresponding coordination agent; Make it to join the corresponding simulation zone, communicate through agent communication language (ACL) between them simultaneously, meanwhile; Start traffic control center agent; It obtains each regional traffic through communicating by letter with each coordination agent, and suitable disaster is evacuated and the point duty model sends instructions to police agent and signal lamp agent through from disaster evacuation model and commander's model library, reading, and realizes the control of traffic.
Claims (7)
1. scalable distributed system that supports extensive microscopic traffic simulation; Comprise: synchronization server, district management server, traffic entity emulation server, traffic entity behavior model storehouse server, flexible stream mode distributed model server, traffic entity produce server, emulation display terminal; It is characterized in that: traffic entity produces server through reading the corresponding model in traffic flow distribution model service device and the traffic entity model library server; Quantity and characteristic according to setting produce various traffic simulation entity A gent; And join in each traffic entity emulation server; Each traffic simulation server is managed through the district management server, and each district management server carries out time synchronized through synchronization server simultaneously, shows simulated effect through the emulation display terminal at last.
2. according to the scalable distributed system of the extensive microscopic traffic simulation of the described support of claim l; It is characterized in that; The management that the district management server is in charge of all the traffic simulation entity A gent in the whole zone with communicate by letter; All traffic simulation entities operate in each traffic entity emulation server, and operation has the Agent operation platform in each traffic entity emulation server, also moves the Agent operation platform in the district management server; Communication between them adopts the Agent communication language of ACL to communicate, thereby realizes traffic environment information collecting and issue.
3. according to the scalable distributed system of the extensive microscopic traffic simulation of the described support of claim l, it is characterized in that each district management server carries out synchronously through synchronization server; The synchronous traffic model that passes through between Agent and the RTI between them; Mainly realize, in the district management server,, communicate with RTI simultaneously through coordinating the traffic entity Agent that Agent comes the management area through an embedded federal member ambassador and ambassador RTI in Agent; Mainly the class members is realized through calling inner federal member ambassador and RTI people; In the time will advancing the time, advance through their request times, after RTI receives all requests; Return accordingly through wealthy usefulness and to ask propelling when deep function is permitted, thereby the emulation that realizes each traffic zone is synchronous.
4. the scalable distributed system of mould microscopic traffic simulation is observed in support according to claim 1 greatly; It is characterized in that traffic entity model library server is found out their general character through taking out the parameter of various traffic entity behaviors; Deposit in the database; Through this method, make that emulation is the traffic entity characteristic that only needs to upgrade zones of different, then can be repositioned onto new traffic simulation zone to emulation.
5. according to the scalable distributed system of the big warship mould of the described support of claim l microscopic traffic simulation; It is characterized in that; Traffic flow distribution model service device is deposited in the database through the traffic flow distribution probability model in abstract each traffic simulation zone; Through this method, the traffic that makes emulation only need upgrade zones of different divides Jia Tezheng, then can be repositioned onto new traffic simulation zone to emulation.
6. according to the scalable distributed system of the extensive microscopic traffic simulation of the described support of claim l; It is characterized in that; Traffic entity produces server only need read traffic flow distribution model service device and the traffic entity mould model in the server of storehouse of pulling, the traffic entity Agent that produces respective amount and characteristic according to model then can, through entity generator independence; Make and can customized property be enhanced the extensibility of analogue system.
7. according to the scalable distributed system of the extensive microscopic traffic simulation of the described support of claim l, it is characterized in that disaster is evacuated model and commander's model library server; Wherein the Personnel evacuation strategy of various disasters such as fire, chemicals leakage and locality is carried out abstract modeling and deposit in the database; And sum up when various human-like guard dutys and big assembly draw to not comprovincial point duty model, when carrying out emulation, carry out emulation relatively through choosing different strategies; Thereby make the decision-making of optimization; Also can verify that through emulation the strategy of holding is deposited in the model library simultaneously through formulating different strategies.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108711286A (en) * | 2018-05-29 | 2018-10-26 | 重庆市交通规划研究院 | A kind of Traffic growth rate method and system based on multi-source car networking and mobile phone signaling |
| CN111009129A (en) * | 2020-01-08 | 2020-04-14 | 武汉大学 | Urban road traffic flow prediction method and device based on space-time deep learning model |
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- 2011-03-28 CN CN201110074655XA patent/CN102710582A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108711286A (en) * | 2018-05-29 | 2018-10-26 | 重庆市交通规划研究院 | A kind of Traffic growth rate method and system based on multi-source car networking and mobile phone signaling |
| CN108711286B (en) * | 2018-05-29 | 2021-06-08 | 重庆市交通规划研究院 | Traffic distribution method and system based on multi-source Internet of vehicles and mobile phone signaling |
| CN111009129A (en) * | 2020-01-08 | 2020-04-14 | 武汉大学 | Urban road traffic flow prediction method and device based on space-time deep learning model |
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Application publication date: 20121003 |