| Long-range guided rockets are increasingly attracting the attention of countries all over the world because they can ensure high accuracy while giving full play to the advantages of longrange attack.As a guided weapon,the design process of long-range guided rocket involves multiple disciplines,which are coupled and restricted with each other.The traditional serial design method is difficult to meet the design requirements.Multidisciplinary design optimization combines the analysis and optimization of different disciplines with the analysis and optimization of other disciplines with coupling relationships in the system to achieve global optimization.This paper mainly focuses on the multidisciplinary coupling problem in the integrated design of long-range guided rocket.From the perspective of engineering practice,using ISIGHT software as a platform and targeting long-range guided rockets,we divided disciplines and adopted multidisciplinary feasible methods to construct an automated process for multidisciplinary design optimization,providing technical support for improving the design efficiency and quality of long-range guided rockets.The main contents of this paper are as follows:(1)The parametric geometric modeling method of long-range guided rocket is studied.In view of the shortcomings of low modeling efficiency and high cost in traditional geometric modeling,and the lack of accurate description of some curves in the geometric model,resulting in large geometric modeling errors,a three-dimensional CST parametric geometric modeling method is proposed based on the two-dimensional CST parametric method,and the longitudinal contour description function is introduced.On this basis,the geometric shape of the long-range guided rocket is constructed by the method of component combination.Finally,by using VB programming language and the secondary development technology of CATIA,the parametric design of the geometric shape of the long-range guided rocket is realized.(2)The aerodynamic characteristics of long-range guided rocket are studied and analyzed.In multidisciplinary design optimization of long-range guided rocket,selecting appropriate aerodynamic calculation method can improve the optimization effect.For the numerical calculation method and engineering calculation method in the aerodynamic calculation of longrange guided rocket,the aerodynamic force of long-range guided rocket is calculated by MISSION DATCOM engineering estimation and ANSYS FLUENT numerical calculation respectively,the aerodynamic performance analysis is completed,and the most suitable aerodynamic calculation method is obtained,which lays the foundation for the follow-up work.(3)The trajectory and control of long-range guided rocket are studied and analyzed.The coordinate system commonly used in the kinematics of long-range guided rocket and the conversion relationship between coordinates are described,and the dynamics and kinematics of long-range guided rocket are studied and analyzed,and a six-degree-of-freedom long-range guided rocket model is established.The PID control method is used to design the controllers for the three channels.Finally,MATLAB/SIMULINK simulation software is used to model the trajectory and control of the long-range guided rocket and complete the simulation to verify the effectiveness of the controller.(4)The multidisciplinary design optimization of long-range guided rocket is integrated and optimized.By analyzing the coupling relationship and the direction of information transmission between various disciplines,the design structure matrix of long-range guided rocket is established.Based on the tactical indicators of long-range guided rockets,the objective functions,design variables,and constraints of multidisciplinary design optimization are determined.By analyzing and selecting the optimization framework,a multidisciplinary design optimization model for long-range guided rockets is established.Based on the ISIGHT software platform,a multidisciplinary design optimization solution environment for the integrated design of long-range guided rockets is built,and the problem solving and optimization analysis are carried out under this framework.The results show that the initial mass of the long-range guided rocket is reduced by 5.49% through multidisciplinary design optimization,and the comprehensive performance of the long-range guided rocket is further improved.This paper explores,summarizes and summarizes a set of engineering application process of multidisciplinary design optimization technology under the control discipline in the integrated design of long-range guided rocket,providing technical support for multidisciplinary design and optimization in the engineering application of long-range guided rocket. |
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