Dynamic radar cross-section characteristic analysis of wind turbine based on scaled model experimental

Accurately acquiring and analyzing the dynamic radar cross-section (RCS) of wind turbine have a greatsignificance to solve the reradiation interference between wind farms and radar stations. Since the results of highfrequency approximation algorithm are only applicable to the qualitative analysis of electromagnetic scattering, it isalmost impossible to accurately acquire the dynamic RCS of wind turbine in actual engineering cases. To this end,we proposed to acquire the dynamic RCS of wind turbine based on the scaled model experimental measurement in alarge anechoic chamber. The key techniques of setting up the scaled model as well as the experimental platform weredescribed based on the principle of electromagnetic similarity. The accuracy of experimental result is verified by thecomparison with numerical calculation and full-sized experiment reported in literature. By using the control variablemethod, we were able to measure and analyze the amplitude and phase variation of dynamic RCS with frequency,azimuth, and rotational speed, and achieved the transformation of RCS data into engineering practice. This not onlylays a foundation for solving the reradiation interference between wind farms and radar stations, but also provides datasupport for subsequent theoretical research.

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