Extended Smoothing Methods for Sparse Test Data Based on Zero-Padding

Aiming at the problem of sparse measurement points due to test conditions in engineering, a smoothing method based on zero-padding wavenumber domain is proposed increase data density. Firstly, principle extension and introduced. The core idea this extend discrete series by domain. conversion between spatial domains achieved using Discrete Fourier Transform (DFT) Inverse (IDFT). Then, two sets two-dimensional random are extended smoothed, respectively, results verify effectiveness feasibility algorithm. can effectively density engineering tests, achieve application areas related processing.