GENERATION OF TIME DOMAIN DRIVE SIGNALS IN MIMO RANDOM VIBRATION CONTROL SYSTEM

Abstract

The new generation algorithm of time domain drive signals is presented to reduce the loop time in MIMO (multi input multi output) random vibration control system. The Parks-McClellan method is used to design the FIR (finite impulse response) filter. And then the drive signals in time domain is generated by filtering a series of independent white noise with the designed filter. For avoiding the time domain randomization process in the conventional frequency-to-time transformation, the new method is favorable to improve the real-time property of the control system. Two tests are run in one 6 DOF (degree of freedom) hydraulic shaker with the conventional algorithm and the improved algorithm differently. The results demonstrate the effectiveness of the improved algorithm.