VB20SL 20Hz Datalogger with Slip Angle Overview The VBOX is a powerful instrument used for measuring the speed, position and angle of a moving vehicle. Tyre slip angle = tire slip angle.

A slip angle is the difference between the steering angle and the direction in which the tyre foot print is taking. explained in previous articles in this series, the yaw moment diagram is a representation of all the possible states of the vehicle during a corner at a given speed. The VBOX 3i Dual Antenna comes with a VBOX Manager , a display enabling you to change the dynamic modes and filter settings, set up slip angle data and define antenna locations. Excessive slip angles!!! Basically, it is the angle which the wheels of a vehicle make with the vertical axis as seen from the front of the vehicle.

Tyre slip angles play a major part in steering systems and have a large effect on steering geometry such as Ackermann and toe. Camber angle could be either positive or negative depending on the design of the chassis and suspension system. Slip is generally given as a percentage of the difference between the surface speed of the wheel compared to the speed between axis and road surface. VBOX Speed & Route Profiler is designed to display simple and accurate instructions to a test driver without the need for training or written instructions. A change of 0.5° is already significant. Alignment of the antennas is not completely essential as the Slip Angle Sensor has the ability to calculate any offset. This is defined as the angle (degrees) formed between the actual direction of travel of the wheel and the ‘pointing’ direction of the wheel (perpendicular to the axis of rotation). (Exactly like camber thrust.) based. The main problem in measuring slip angle is that it is a very small angle. Even though we simulate all the combinations of steering wheel angle (δ) and chassis slip angle (β) within a …

The lateral velocity of the contact surface is y ˙, and from Figure 2.39, the contact surface side-slip angle is … If overall slip is to be measured (at the centre of the vehicle), the primary antenna should be placed at the centre of the vehicle. If overall slip is to be measured (at the centre of the vehicle), the primary antenna should be placed at the centre of the vehicle. I hope this note is useful to people. There are two main ways to measure slip angle of a tire: on a vehicle as it moves, or on a dedicated testing device. The brush model moving at a constant slip angle has been depicted in greater detail in Figure 3.3.It shows a contact line which is straight and parallel to the velocity vector V in the adhesion region and curved in the sliding region where the available frictional force becomes lower than the force which would be required for the tips of the tread elements to follow the straight line further. Understanding slip angle, or more precisely “tyre slip angle“, is fundamental to understanding how to go faster on four wheels. rotate it around its vertical axis. This post gives a brief introduction to the subject of slip angle and why it is so important to going faster in a racing car.

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This allows the unit to measure slip angle, and also pitch angle (or roll angle depending on how the antennas are mounted), all at 100 Hz. In the presence of a non-zero slip angle, this torque tends to steer the tire toward the direction in which it …

Lateral Deflection and Slip Angle When the driver turns the steering wheel, the car initiates negotiating the corner. See the Slip Angle Offset Section. Alignment of the antennas is not completely essential as the Slip Angle Sensor has the ability to calculate any offset. Figure 2.39 shows that when a sudden side-slip angle, β, occurs on a tire traveling in its rotating direction, then a lateral force is produced, and the contact surface deforms y in the lateral direction only. Racelogic Ltd, manufacturers of the award winning VBOX range of GPS-based performance analysers and data loggers, are pleased to announce the introduction of the VBOX II SX with Slip Angle. Tyre slip angle explained. Figure 2.39 shows that when a sudden side-slip angle, β, occurs on a tire traveling in its rotating direction, then a lateral force is produced, and the contact surface deforms y in the lateral direction only.