| China is a large satellite launching country,in order to meet the requirements of high-volume and high-precision production,a fully automated and intelligent production line is necessary.However,there are many satellite parts,this paper only develops a Accuracy Inspection and Enhancement Intelligent System for Satellite(AIEISS).Satellite structural part is used for positioning of other parts and sensors,which require high processing accuracy,and the system needs to have the function of in-situ measurement and trimming.To overcome the problem of industrial software being subject to external control,to achieve complete domestication of the entire AIEISS system while ensuring safety and controllability.The main work accomplished includes:1.Study of the overall scheme of AIEISS system.Research and analysis of the hardware and software parts of the system were conducted.Based on the requirements of the AIEISS system,the demand analysis of the software was carried out to clarify the need for the software to achieve the function of in-situ measurement and adjustment of satellite structural component.The software was divided into two major modules:measurement subsystem and dajustment subsystem.Windows was determined as the development platform,and relevant technologies were developed based on the OCC(Open Cascade)open-source 3D engine.2.Research on measurement trajectory planning and interference detection technology of AIEISS system.Research on the method of extracting uniformly distributed sampling points on the surface to be inspected according to the part model,analyze the measurement characteristics of the touch probe,convert the problem of measurement trajectory planning into a TSP(Traveling Salesman Problem),and use a hybrid genetic algorithm and adaptive large neighborhood search algorithm to plan the measurement trajectory with the shortest distance.For the interference detection technology,we propose a method based on OCC to implement the scanning entity method to avoid the problem of interference in the measurement trajectory.3.Technical research based on OCC satellite detection adjusted geometry information Twin implementation.Based on OCC using position transformation algorithm to realize model position transformation,discrete position transformation operation is used to realize motion simulation function.Combined with the developed HNC communication software to obtain the machine tool operation information to realize the digital twin of AIEISS system.Use KAFKA to establish the communication with the control system,and complete the development of the control system communication software according to the corresponding interface protocol and format.4.Research on error analysis and adjustment of satellite structural parts of AIEISS system.A feature library for shape and positional accuracy was developed to store the accuracy requirements of the satellite structural component.Error analysis was conducted for different accuracy levels,calculated precise trimming allowances for the component that failed to meet the requirements,design the corresponding trimming process,compensate the processing by using coordinate alignment and meet the requirements of in-situ high precision measurement and trimming.5.AIEISS system in-situ measurement and trimming experiment.,The probe trigger radius was calibrated and the measurement accuracy of the system was determined before the experiment.The machining experiments of the overall sample were operated according to the complete process of production line automation.The flatness and perpendicularity of the trimmed parts met the required precision. |
