| Summary: | Background: This study aims at addressing the lack of closed-loop feedback optimizationenabling tool in aircraft automatic spraying systems; we systematically analyze a three-dimensional (3D) virtual-real mapping technique, namely the digital twin technique, used by the automatic spraying system. Methods: With the sensors installed in the spraying system, the spraying working parameters are collected online and are used for driving the 3D virtual spraying system to realize the total-factor monitoring of the spraying operation. Furthermore, the operation-evaluation model is applied for analyzing and managing the key indexes of the spraying quality; once the data value of the key indexes exceeds a threshold, the operation shall be optimized automatically. Results: This approach can effectively support the high-efficiency analysis, evaluation, and optimization of the spraying process. Keywords: Digital twin, Aircraft, Automatic spraying, Virtual reality, Virtual environment
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