An adaptive feedback algorithm is designed and implemented on a digital signal processor (DSP) system for the active vibration control (AVC) of a small structure. Real time experimental results show that the convergence speed and stability of the system are related to the exciting frequency, filter order, and the sampling frequency. The theoretical upper bound of the sampling frequency for a particular exciting frequency and filter order is compared with experiment, which is very important for designing practical digital AVC applications that control low-frequency vibration using low-cost data converters such as coder-decoder chips that only support high sampling frequencies.
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