FyIF₂ α = 20 α = 12 0/25 -α = 8. -α = 4- απ = 2 -0.5 -0.3 -0.1 0.1 0.3 0.5 Braking Driving FIGURE 1.87. Lateral force ratio Fy/Fz as a function of slip ratio s for different sideslip a.

Elements Of Electromagnetics
7th Edition
ISBN:9780190698614
Author:Sadiku, Matthew N. O.
Publisher:Sadiku, Matthew N. O.
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About Lateral and longitudinal sliding.

By applying a pulling (or braking) force to the tire, the lateral force decreases while a longitudinal force Fx = ux(s)Fz is developed (Fig 61 of the handout). The following figure presents experimental data showing the reduction of lateral force in the presence of the slip rate s. Note that when α decreases to zero, the lateral force, Fy, is also reduced to rezo and the longitudinal force, Fx, is increasing. Now, consider that a tyre has the estimated behaviour shown in the following figure. Assuming that a vehicle is making a turn with constant speed in a circle so that α =4 degrees. To give the same lateral force for when α = 4 degrees, what is the angle of drift, α, if the car is accelerated such that s = 0.05, or decelerated such that s = −0.05?

FyIF₂
α = 20
α = 12
0/25
-α = 8.
-α = 4-
απ
= 2
-0.5
-0.3
-0.1
0.1
0.3
0.5
Braking
Driving
FIGURE 1.87. Lateral force ratio Fy/Fz as a function of slip ratio s for different
sideslip a.
Transcribed Image Text:FyIF₂ α = 20 α = 12 0/25 -α = 8. -α = 4- απ = 2 -0.5 -0.3 -0.1 0.1 0.3 0.5 Braking Driving FIGURE 1.87. Lateral force ratio Fy/Fz as a function of slip ratio s for different sideslip a.
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