Switched observer-based ramp metering controllers for freeway systems
Switched observer-based ramp metering controllers for freeway systems
复制标题
用于高速公路系统的基于切换观测器的匝道计量控制器
DOI：
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发表时间：
2016
期刊：
影响因子：
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通讯作者：
F. Rubio
中科院分区：
文献类型：
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作者：
A. Ferrara;S. Sacone;S. Siri;C. Vivas;F. Rubio
本文提出了本地匝道控制器应用于高速公路，其中没有传感器测量交通密度接近入口匝道。由于要应用的匝道控制律是基于交通密度的上游或下游的入口匝道的值，因为这些密度不能被测量，密度估计提供的分布式共识为基础的切换观察员在以前的工作中使用。特别是，所考虑的高速公路系统，这是一个分段仿射状态相关系统建模的可观测性的基础上，提出了一种基于分布式观测器的切换匝道控制器。根据高速公路系统的当前模式，每个入口匝道的局部控制器在基于下游密度的反馈控制器、基于上游密度的前馈控制器和预先计算的控制律之间切换。
This paper proposes local ramp metering controllers to be applied in freeways in which there are not sensors measuring the traffic density close to the on-ramps. Since the ramp metering control laws to be applied are based on the value of the traffic densities upstream or downstream the on-ramps and since these densities cannot be measured, the density estimates provided by distributed consensus-based switched observers developed in a previous work are used. In particular, on the basis of the observability properties of the considered freeway system, which is modeled as a piecewise-affine state-dependent system, a switched ramp metering controller based on a distributed observer is proposed. According to the present mode of the freeway system, the local controller of each on-ramp switches between a feedback controller based on the downstream density, a feedforward controller based on the upstream density and a pre-computed control law.