Independent All-Wheel Drive Distribution Control and Estimation of Tire Effective Cornering Stiffness Based on Vehicle Lateral Dynamics

With the development of the economy and automobile technology, highway traffic shows the trend of high-speed driving, intensive traffic flow, and non-professional drivers. Frequent traffic accidents make highway traffic safety a social issue of widespread concern. The solution to this security problem is divided into two parts: active safety and passive safety. Active safety refers to the vehicle performance that vehicle helps the driver avoid accidents as safely as possible in all situations, such as reliability, environmental visibility, lateral system dynamics, and acceleration or braking. Arranged in descending order via the proportion of inducing factors of automobile accidents, they are lateral system dynamics, acceleration and braking, visibility and reliability. Passive safety refers to vehicle performance to minimize the loss of an unavoidable accident (especially when it comes to casualties). It contains external safety (cyclists and pedestrians) and internal safety (passengers). For decades, how to design automobiles to obtain excellent active safety, especially lateral system dynamics, has been one of the main research directions of scholars and designers from all over the world.