Research On Multidisciplinary Design Optimization Technology Of A Certain Type Of Tactical Missile Based On OPTIMUS

As an important support of the army's long-range strike capability and system combat capability,the small ground to ground tactical missile weapon system is increasingly concerned by the world's military powers.There are strong discipline coupling and high computational complexity in the overall design of ground to ground missile.Taking a ground to ground tactical missile under research as the object,the overall design simulation analysis automation process is constructed by using the OPTIMUS software platform.Based on the dynamic penalty function theory,a multidisciplinary design optimization(MDO)process suitable for the overall design optimization of small ground to ground tactical missile is proposed,and the feasibility of the design optimization process is preliminarily verified by the flight test data.The mainly work as following:An improved collaborative optimization(CO)for complex system optimization is proposed.The reasons for the calculation difficulty of CO is studied,and the shortcomings of the improved method based on consistency constraint relaxation,combined with modern intelligent algorithm and the combination of the two methods are analyzed,then an improved CO based on dynamic penalty function is proposed.The performance of the standard CO,the classic improved CO and the CO based on the dynamic penalty function are analyzed through the classic MDO example,and the advantages of the improved CO based on the dynamic penalty function are verified.The analysis models of the small ground to ground tactical missile are established.Through geometric shape parameterization,aerodynamic performance calculation,propulsion scheme design,overall layout arrangement and trajectory simulation,the analysis models of the small ground to ground tactical missile are established to lay the foundation for the follow-up work.The accuracy of the analysis models is verified by the measured data of missile prototype and flight test.The aerodynamic response surface model of the small ground to ground tactical missile is established.The central composite design and latin hypercube design are used to obtain the sample points.The approximate aerodynamic models of the small ground to ground tactical missile are constructed by polynomial response surface method and radial basis function method.Based on the error checking theory of surrogate model,the accuracy of four surrogate models is compared and analyzed,and the one with the strongest approximation ability is selected to participate in the subsequent subject integration.The overall optimization model of the small ground to ground tactical missile is established.By analyzing the coupling relationship and the information transfer direction among various disciplines,the missile design structure matrix is established.Based on MDF and improved CO,the MDO models of missile are established.Combined with the aerodynamic response surface model,the overall design optimization model is integrated and calculated on the OPTIMUS software platform,and a better overall parameter scheme is obtained,which reduces the missile take-off mass by 6.80%.The results show that the CO based on the dynamic penalty function applicable and feasible for the overall design of missile.