The invention discloses a macroscopic simulation-fused urban road network microscopic traffic simulation system parameter calibration method. The method comprises the steps of building a microscopic traffic simulation system and a macroscopic traffic simulation system; respectively executing the microscopic traffic simulation system and the macroscopic traffic simulation system by using the initial simulation parameter x; building a meta-model m (.) by using the microscopic simulation result and the macroscopic simulation result, and estimating a parameter feasible solution xh by using the meta-model m (.); respectively executing a microscopic traffic simulation system and a macroscopic traffic simulation system by using the parameter feasible solution xh, and calculating a microscopic simulation error lmic (xh); and comparing the microscopic simulation errors corresponding to the two simulation parameters x and xh, and updating the simulation parameter x of the microscopic traffic simulation system to the simulation parameter corresponding to the smaller microscopic simulation error. According to the method, the error gradient of a large-scale microscopic simulation result and an actual state is quickly estimated by utilizing the meta-model, quick search of simulation parameters is realized, the meta-model is constructed to fit a microscopic traffic simulation result, and the result has relatively high consistency with the microscopic simulation result.
本发明公开了一种融合宏观仿真的城市路网微观交通仿真系统参数标定方法,包括:搭建微观交通仿真系统以及宏观交通仿真系统;利用初始的仿真参数x分别执行微观交通仿真系统和宏观交通仿真系统;利用微观仿真结果和宏观仿真结果搭建元模型m(·),利用元模型m(·)估计参数可行解xh;利用参数可行解xh分别执行微观交通仿真系统和宏观交通仿真系统,计算微观仿真误差lmic(xh);比较两个仿真参数x和xh对应的微观仿真误差,将微观交通仿真系统的仿真参数x更新为较小微观仿真误差对应的仿真参数。本发明利用元模型快速估计大规模微观仿真结果与实际状态的误差梯度,实现仿真参数的快速搜索,构建元模型以拟合微观交通仿真的结果,与微观仿真结果具有较高的一致性。
Urban road network microscopic traffic simulation system parameter calibration method fused with macroscopic simulation
融合宏观仿真的城市路网微观交通仿真系统参数标定方法
2023-01-20
Patent
Electronic Resource
Chinese
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