Adams Assignments – Problem 4 – Steering geometry 2

Solution

SLA Suspension is opened and Parallel Wheel Travel Simulation is performed.

Original HP

Tuned HP

Post processor Output Plots

• Caster angle

  Caster angle (Original): 5.37deg

  Caster angle (Modified): 3.9965 deg

  Effects:

  Steering effort is lowered, steering is easy.

  • Caster moment arm

  Caster moment arm (Original): 9.3505 mm

  Caster moment arm (Tuned): 21.7929 mm

  Effects:

  Self-centering torque in the steering system is increased.

  • KPI angle

  KPI angle (Original): 10.07 deg

  KPI angle (Tuned): 12.05 deg

  Effects:

  Self-centering torque is increased.

  • Steer axis offset (Resultant)

  Steer axis offset (Original): 85.7725 mm

  Steer axis offset (Tuned): 80.5925mm

  Effects:

  No Significant change.

  • Steer axis longitudinal offset

  Steer axis longitudinal offset (Original): -18.7407 mm

  Steer axis longitudinal offset (Tuned): 0.8802mm

  Effects:

  Stability of the vehicle is increased.

  • Scrub radius

  Scrub radius (Original): 32.3614mm

  Scrub radius (Tuned): 18.8349 mm

  Effects:

  Steering effort is reduced. Lower scrub radius decreases the braking disturbances of the vehicle.

  CAN THE PARAMETERS BE CONTROLLED INDEPENDENTLY? :-

  We cannot vary the parameters individually because they are mutually supporting and are interrelated.

  If we tune any hard point to achieve the target it will disturb the other target. This is the reason why the parameters cannot be controlled individualistically.