The dual control loop design of the Xcite Master Controller affords three major advantages to the structural dynamist. First, the compression control of the dynamic loop changes the amplitude of the system drive signal dynamically to adjust the displacement output of the exciter to maintain a constant sine force even as the compliance of the structure changes during frequency sweeps.
This allows the study of non-linear structures by developing a family of data curves with varying levels of constant static and dynamic forces.
Second, the dual loop philosophy allows the mixture of feedback signals such as static displacement and dynamic force when testing compliant structures such as an automotive suspension or engine mounting subsystem. The static control may be force or displacement, while the dynamic control may be force, displacement, velocity or acceleration.
Third, a user selectable power amplifier input allows the dynamist to use either an external digital shaker control system or FFT analyzer DAC to drive the system with random, shaped random, white noise, chirp, pulse or user-generated waveforms. Master Controllers are rack-mountable and may be located hundreds of feet from the exciter head and power supply.