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An adaptive inverse controller in the out loop, which are applied as an outer control loop around the inner control loop of the two-axis angle shaking table, are presented to provide increased control accuracy, stability and reproducibility in applications where inner-control-loop methods prove to be inadequate. Two kinds of adaptive algorithms LMS (Least-mean-square) and RLS (recursive-least-square)...
The random vibration adaptive control method is presented based on the recursive least-squares (RLS) adaptive filter. The power spectral density (PSD) of drive signal is updated based on the off-line identification of frequency response function (FRF) in conventional random vibration control system. And the pseudo-random drive signal generated by the conventional time-frequency transformation has...
The random vibration adaptive control method is presented based on the Kalman adaptive filter to improve the control precision of random vibration test system. The Kalman adaptive filter is used to obtain the on-line inverse model of the device under test (DUT). The time domain signal having a reference power spectral density (PSD) is updated by the inverse model. The reference PSD is replicated by...
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