关键词: 卫星总装, 物料配送, 时间预测, 路径规划, 数字孪生

Abstract: The satellite assembly shop-floor is transforming from the traditional single-satellite and single-station assembly mode into the multi-satellite batch pulsing assembly mode.However,the asynchronous of assembly execution and material distribution is one of the important factors affecting the efficiency and quality of satellite assembly.To solve this problem,a just-in-time material distribution method based on grey theory and multi-model interaction mechanism was proposed,which was suitable for satellite assembly digital twin shop-floor.Aiming at the completion time uncertainty of the personnel operations in the process completion time prediction problem,a method of predicting material demand time based on grey theory was proposed.A time-controlled path planning method was proposed to solve the collision problem between mobile carriers with a guide rail and without one.A multi-model interaction mechanism was established through the time window to ensure that carriers did not collide between paths.The application verification was carried out in the satellite assembly digital twin shop-floor.The result suggested that the proposed method could effectively reduce the prediction error caused by differences among workers,and effectively solve the problem that the time of path planning was uncontrollable in the mixed environment.

Key words: satellite assembly, material distribution, time prediction, path planning, digital twin