FULL CAR TEST SYSTEM

Fundamentals of Vibration Isolation

The goal of vibration isolation is to isolate either the vibrating object (active isolation) or the object that must be protected against vibration (passive isolation) from its surrounding. This is realized by interposing springs in order to make the particular object an independent, oscillatory system.
The interference suppression functions as follows: The frequencies must be coordinated in such a way that the cyclic movements of the system are no longer synchronized but anti-phased with the interference. That means that when the exciting power directed downwards has reached its maximum, the vibrating object is in its highest position, i. e. it swings contrary to the exciting power.
To reach an effective isolation of oscillation the frequency quotient must become as high as possible: