Zhao Xiaodan

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Micro-perforated panel absorber(MPA) with linear-change cavity can increase the frequency bandwidth of sound absorption, but its theoretical computation results are not in good accordance with the experiment results. A MPA with linear-change cavity is divided equivalently into several absorbers with equal width. After the simplification of the model, the(More)
The boundary loose of cantilever beam is one of the factors that affect the structural safety. By ADAMS calculation and experiment, it is proved that the nature frequency of cantilever beam will change subtly when the constraint force on the boundary of a cantilever beam is changed. The Discrete Fourier Transform (DFT) method adopts prior base strategy. The(More)
The dense signal identification requires resolving leakage-error and the cross-interference produced by the different frequency signals at the same time. Inner product and iteration calculation are combined to identify the dense signal. The max of amplitude of inner product is searched to estimate the parameters of a signal initially; then the estimated(More)
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