In this paper, an integrated control strategy (ICS) is proposed to improve high speed dynamics stability of the vehicle by the integration of active aerodynamic control (AAC) and differential braking control (DBC). Two aerodynamic surfaces are attached to the roof of the vehicle and servo-controlled separately in real-time. A hierarchical control structure is used to design the proposed scheme, which is composed of an upper and a lower controller. In the upper controller, the additional yaw moment required for stability control is determined by sliding mode control with the consideration of driver inputs, vehicle dynamic and the limitation of road adhesion. In the lower controller, a control strategy is designed to coordinate differential brake and active aerodynamic control, and an optimal control allocation algorithm is adopted to distribute the brake pressure of each wheel. A simplified magic formula tire model is used to describe the nonlinearity of the tires. Two double lane change tests on dry and wet road performed to study the effectiveness of the control algorithm in CarSim/Simulink Co-simulation. The results show the proposed control strategy can effectively improve the vehicle dynamics stability and tire workload usage.

中文翻译：

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差速制动和主动空气动力控制的集成控制，以提高车辆的高速稳定性

本文提出了一种集成控制策略（ICS），通过集成主动空气动力学控制（AAC）和差动制动控制（DBC）来提高车辆的高速动力学稳定性。两个空气动力学表面附着在车辆的车顶上，并分别由实时伺服控制。采用分层控制结构设计该方案，该方案由上，下控制器组成。在上层控制器中，稳定性控制所需的额外横摆力矩由滑模控制确定，其中要考虑驾驶员的输入，车辆动力和道路附着力的限制。在下层控制器中，设计了一种控制策略来协调差速制动和主动空气动力学控制，采用最优控制分配算法分配各车轮的制动压力。简化的魔术公式轮胎模型用于描述轮胎的非线性。为了在CarSim / Simulink联合仿真中研究控制算法的有效性，进行了两次在干燥和潮湿路面上的双车道变换测试。结果表明，所提出的控制策略可以有效提高车辆动力学稳定性和轮胎工作负荷的使用率。