Hunter GSP9712 - 8 Theory of Operation; Harmonic Vibrations

GSP9700 Series Road Force Measurement System Operation 8. Theory of Operation  131
8. Theory of Operation
8.1 Harmonic Vibrations
A vibration in a tire and rim assembly can be caused by:
Imbalance
Change in Sidewall Stiffness (Force Variation)
Rim Bent/Out-of-Round
Tire Out-of-Round
Wheel to Axle Mounting Error*
Brake Component Wear or Failure*
Drivetrain or Engine Component Wear or Failure*
Vehicle Component Characteristics*
Combination of Some or All Factors
*Factors not detected by the GSP9700 Series Road Force MeasurementSystem.
A vibration that occurs one time for every revolution is defined as a first harmonic
vibration:
FIRST HARMONIC VIBRATION
1
RADIAL FORCE
VARIATION
IMBALANCE
1
RADIAL
RUNOUT
UPWARD
FORCE
1
(RIH)
IMBALANCE
RADIAL RUNOUT
RADIAL FORCE
VARIATION