In (automotive) vehicle dynamics, slip is the relative motion between a tire and the road surface it is moving on. This slip can be generated either by the tire 's rotational speed being greater or less than the free-rolling speed (usually described as percent slip), or by the tire 's plane of rotation being at an angle to its direction of ...

又称为滑动率，当轮胎发出牵引力或 制动力 时,在轮胎与地面之间都会发生相对运动。 滑移率是在 车轮 运动 中 滑动 成分所占的比例，用S表示。 汽车 从纯滚动到 抱死 拖滑的制动过程是一个渐进的过程，经历了 纯滚动 、边滚边滑和纯滑动三个阶段。 为了评价汽车车轮滑移成分所占比例的多少，常用滑移率s来表示，其定义如下： 式中：u为车速； u w为车轮速度；ω为车轮滚动角速度；r为车轮半径。 当车轮纯滚动时，u w = u ，s = 0；当车轮抱死纯滑动时， u w = 0 , s …

Locomotive wheelslip is an event that affects railway motive power usually when starting from stationary, but can also affect an engine in motion. The greatest effort is required from a locomotive when starting.

Slip ratio is a means of calculating and expressing the slipping behavior of the wheel of an automobile. It is of fundamental importance in the field of vehicle dynamics, as it allows to understand the relationship between the deformation of the tire and the longitudinal forces (i.e. the forces responsible for forward acceleration and braking ...

Once the wheels slip, the contact point actually moves on the ground, i.e. kinetic friction. While the contact point is stationary, the applied force exactly matches the friction force - up to the point where the force is greater than the maximum friction possible between tyre and ground.

estimating the longitudinal wheel slip is crucial for an effective design of ABS, TCS and ESC control systems, especially in the case when the control problem is formulated as the regulation of the wheel slip itself.

2009年11月24日 · To solve this problem, a second-order sliding-mode traction controller is presented in this paper. The controller design is coupled with the design of a suitable sliding-mode observer to estimate the tire-road adhesion coefficient. The traction control is achieved by maintaining the wheel slip at a desired value.

2024年11月13日 · Abstract: The automotive hydraulic anti-lock braking systems employ cascaded wheel slip control (WSC) and pressure control and adopt the pulse-width-modulation technique to deal with discrete valve dynamics. Pursuing a simple and effective alternative, this article presents a cascade-free discrete-valued predictive WSC (DV-P-WSC) method.

Anti-lock braking systems (ABS) are meant to control the wheel slip in order to maintain the friction coefficient close to the optimal value. Wheel slip is defined as the relative motion between a wheel (tire) and the surface of the road, during vehicle movement.

2025年2月20日 · The results demonstrate that the PID-based anti-slip controller with an optimal threshold achieves the maximum utilization of wheel/rail adhesion in the presence of low-friction conditions, outperforming the other two types of anti-slip controllers.