Multi-level vibration test system having controllable vibration attributes

A multi-level vibration test system that is operational to subject a product under test to vibrations of predetermined frequencies, comprising:

• a primary shaker module, for producing vibrations at a first predetermined set of frequencies, including at least one actuator connected to said primary shaker module for generating an impulse force to initiate vibrations at said first predetermined set of frequencies;
• a secondary shaker module, for producing vibrations at a second predetermined set of frequencies, including at least one actuator connected to said secondary shaker module for generating an impulse force to initiate vibrations at said second predetermined set of frequencies;
• and
• means for non-rigidly coupling said initiated vibrations from said primary shaker module to said secondary shaker module to create a composite vibration of predetermined frequencies and magnitudes.

A vibration test system that is operational to subject a product under test to vibrations of predetermined frequencies, comprising:

• a base;
• a shaker module on which said product under test is mounted;
• at least one actuator connected to said shaker module and said base for generating a force to initiate vibrations at a first predetermined set of frequencies;
• at least one actuator exclusively connected to said shaker module for generating a force to initiate vibrations at a second predetermined set of frequencies;
• and means for non-rigidly coupling said initiated vibrations of the first and second predetermined set of frequencies to created a composite vibration of predetermined frequencies and magnitude.