中文摘要：

在自动化高速公路的环境下，针对一种基于非线性积分器Backstepping方法的交通流密度控制器，本文提出一种改进的交通流速度控制器设计方法，选取交通流速度为被控变量，并采用Backstepping方法进行控制器的设计，保证使每个路段的交通流速度以指数形式快速收敛到期望值．与已有的方法相比较，该控制器极大地提高了算法效率，而且无需矩阵的逆运算，可以自动满足系统的可控性条件．仿真结果显示该控制器可以有效地减少道路拥塞，有助于在拥堵的高速公路上实现平滑的交通流．

英文摘要：

On the basis of the traffic density control design by using the nonlinear integrator-Backstepping method, this paper proposes an improved method for designing the traffic flow-speed control by selecting the traffic flow-speed as the controlled variable and applying the Backstepping method to design the controller for an automated highway system, The controller guarantees the traffic flow-speed at each section to be exponentially convergent to the desired speed. Comparing with the prior methods, this controller is superior in algorithm-efficiency, being free from matrix inversion, and automatically satisfying the controllability condition. Simulations show that this controller effectively reduces the congestion and helps to achieve a smooth traffic flow on a congested highway.