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A comparison on optimal torque vectoring strategies in overall performance enhancement of a passenger car

机译：乘用车整体性能提升中最佳转矩矢量化策略的比较

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In this paper, a comparison is made on different torque vectoring strategies to find the best strategy in terms of improving handling, fuel consumption, stability and ride comfort performances. The torque vectoring differential strategies include superposition clutch, stationary clutch, four-wheel drive and electronic stability control. The torque vectoring differentials are implemented on an eight-DOF vehicle model and controlled using optimized fuzzy-based controllers. The vehicle model assisted with the Pacejka tyre model, an eight-cylinder dynamic model for engine, and a five-speed transmission system. Bee's Algorithm is employed to optimize the fuzzy controller to ensure each torque vectoring differential works in its best state. The controller actuates the electronic clutches of the torque vectoring differential to minimize the yaw rate error and limiting the side-slip angle in stability region. To estimate side-slip angle and cornering stiffness, a combined observer is designed based on full order observer and recursive least square method. To validate the results, a realistic car model is built in Carsim package. The final model is tested using a co-simulation between Matlab and Carsim. According to the results, the torque vectoring differential shows better handling compared to electronic stability control, while electronic stability control is more effective in improving the stability in critical situation. Among the torque vectoring differential strategies, stationary clutch in handling and four-wheel drive in fuel consumption as well as ride comfort have better operation and more enhancements.
机译：在本文中，对不同的转矩矢量策略进行了比较，以找到在改善操纵性能，燃油消耗，稳定性和乘坐舒适性方面的最佳策略。扭矩矢量差分策略包括叠加离合器，固定离合器，四轮驱动和电子稳定性控制。扭矩矢量差分在八自由度车辆模型上实现，并使用优化的基于模糊的控制器进行控制。车辆模型辅以Pacejka轮胎模型，发动机的八缸动态模型和五速传动系统。 Bee的算法用于优化模糊控制器，以确保每个转矩矢量差分在其最佳状态下工作。控制器控制扭矩矢量差速器的电子离合器，以最大程度减小偏航角误差并在稳定区域内限制侧滑角。为了估计侧滑角和转弯刚度，基于全阶观测器和递归最小二乘法设计了组合观测器。为了验证结果，在Carsim程序包中构建了一个逼真的汽车模型。最终模型使用Matlab和Carsim之间的协同仿真进行了测试。根据结果​​，与电子稳定控制相比，转矩矢量微分显示出更好的操控性，而电子稳定控制在提高紧急情况下的稳定性方面更为有效。在扭矩矢量差分策略中，操纵中的固定离合器和油耗以及舒适性方面的四轮驱动具有更好的操作和更多的增强。

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