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为了得到稳定有序的道路交通流,依据离散趋近律,设计了交通流的速度控制器.考虑到由于匝道的流入和流出使得交通流具有不确定性,设计了动态扰动补偿器.以各路段的密度为控制目标,先通过密度函数的离散趋近律求得目标速度,然后利用速度控制器使得速度在有限步内等于目标速度.当控制器参数满足一定条件时,交通流密度最终稳定在一定的范围内,同时给出了算法步骤和证明.仿真结果显示,速度控制器将有匝道路段的交通流密度稳定在指定值附近,而无匝道路段的交通流密度趋于指定值,从而避免了道路拥挤的发生.
In order to obtain a stable and orderly road traffic flow, the speed controller of traffic flow is designed according to the discrete approaching law.A dynamic disturbance compensator is designed considering the uncertainties of the traffic flow due to the in and out of the ramp. The density of the road section is the control target, the target speed is calculated by the discrete approximation law of density function, and then the speed controller is used to make the speed equal to the target speed in a finite step. When the controller parameters meet certain conditions, the traffic flow density finally stabilizes The simulation results show that the speed controller stabilizes the traffic density of the road sections in the vicinity of the specified value, while the traffic density of the road sections without the ramp tends to the specified value. Avoid road congestion.