In response to the problem that azimuth estimation error of the expandable aperture array is greatly affected by loading platform，modeling and simulation and experimental study have been carried out. Modeling of the expandable aperture is based on a double-layer cylindrical multi-element linear array，and the expandable aperture is installed on unmanned platforms. According to the actual use scenario and installation platform，a beam forming algorithm with delay compensation function and self-adaptation attitude compensation algorithm are designed. Simulation and experimental results show that the proposed algorithms can effectively reduce the azimuth estimation error of this extensible aperture array and have good stability.
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