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System Identification and Online Equalization Technique Based Swept Sine Vibration Testing Control

In consideration of the measuring time, the measurement of the transfer function of a system to be controlled by means of excitation using sweep sine excitation is unpractical especially with lower sweep rate. A combined approach is proposed based on transfer function measurement, parameter identification, offline iterative, and the online equalization technique. Factors include sweep rate and damping that affect the difference of Frequency response function (FRF) with random and sweep sine excitation have been investigated. The proposed method provides good convergence characteristic at both single point and broad frequency band. The desired drive signal is obtained and the control process gives higher control precision.