Ma Xinbo, Wong Pak Kin, Zhao Jing, Xie Zhengchao
Department of Electromechanical Engineering, University of Macau, Taipa, Macau 999078, China.
School of Mechanical and Automotive Engineering, South China University of Technology, Guangzhou 510641, China.
Sensors (Basel). 2016 Dec 28;17(1):49. doi: 10.3390/s17010049.
Active front steering (AFS) is an emerging technology to improve the vehicle cornering stability by introducing an additional small steering angle to the driver's input. This paper proposes an AFS system with a variable gear ratio steering (VGRS) actuator which is controlled by using the sliding mode control (SMC) strategy to improve the cornering stability of vehicles. In the design of an AFS system, different sensors are considered to measure the vehicle state, and the mechanism of the AFS system is also modelled in detail. Moreover, in order to improve the cornering stability of vehicles, two dependent objectives, namely sideslip angle and yaw rate, are considered together in the design of SMC strategy. By evaluating the cornering performance, Sine with Dwell and accident avoidance tests are conducted, and the simulation results indicate that the proposed SMC strategy is capable of improving the cornering stability of vehicles in practice.
主动式前轮转向（AFS）是一种新兴技术，通过在驾驶员输入的基础上引入额外的小转向角来提高车辆的转弯稳定性。本文提出了一种带有可变传动比转向（VGRS）执行器的AFS系统，该系统采用滑模控制（SMC）策略进行控制，以提高车辆的转弯稳定性。在AFS系统的设计中，考虑使用不同的传感器来测量车辆状态，并对AFS系统的机构进行了详细建模。此外，为了提高车辆的转弯稳定性，在滑模控制策略的设计中同时考虑了两个相关目标，即侧偏角和横摆率。通过评估转弯性能，进行了驻波正弦试验和事故规避试验，仿真结果表明，所提出的滑模控制策略在实际中能够提高车辆的转弯稳定性。
