| The structure of vehicle-borne radar lifting device is complex,the number of parts and components is very larger,the requirements of technical and precision is high,and the coordination process is complex,product quality and production cost of vehicle-borne radar determined by assembly accuracy in a certain degree.In this thesis,take the vehicle-borne radar lifting device as the research object and study the key elements needed to be controlled to ensure the normal working performance,and then make these elements as assembly accuracy requirements.Then,the key technology of the precision control of the vehicle-borne radar lifting device is studied.The main contents of this thesis are as follows:(1)According to the working principle,structure and working performance requirements of the vehicle-borne radar lifting device,the assembly precision requirements of the vehicle-borne radar lifting device are analyzed.The theoretical analysis and mathematical calculation are used to find the condition of the double screw drive mechanism stuck.Based on Ansys simulation analysis software,research the axial force of screw when the left and right screw bar is not synchronized,to obtain synchronization accuracy requirements of the double screw.(2)Based on the information of assembly process of vehicle-borne radar lifting device,the assembly process model of vehicle-borne radar lifting device is established.The assembly deviation source and deviation transmission path are studied and the assembly deviation source and deviation transmission path of vehicleborne radar lift device are analyzed.According to the characteristics of revolute pairs of vehicle-borne lifting device,the method of transforming the revolute clearance into the equivalent model of the gap is proposed.(3)The sensitivity of deviation source are defined,and put forward the calculation method.Based on the deviation path of the vehicle-borne radar lifting device and the equivalent model of the revolute clearance,the vector loop of deviation transfer and the vector loop equation of the vehicle-borne radar lifting device are established.Based on the calculation method of deviation source Sensitivity and the vector loop equation of vehicle-borne radar lifting device,thesensitivity matrix of the deviation source to the assembly size is solved by mathematical calculation,and the deviation source with large influence on the assembly accuracy of vehicle-borne radar is obtained.(4)Based on the assembly accuracy requirements of the vehicle-borne radar lifting device,two key target characteristics are determined.Based on the VisVSA software and the information of assembly process of vehicle-borne radar lifting device,the simulation analysis model of the assembly accuracy of the vehicle-borne radar lifting device is established.Through the analysis of the simulation results,the optimization scheme of the assembly process is proposed and the effectiveness of the optimization scheme is verified.In this thesis,the methods of theoretical analysis and simulation are used to study the assembly precision requirements and key control technology of the vehicleborne radar lifting device,and some methods are provided for the research on the precision control technology of the vehicle radar lifting device,which has certain reference value. |
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