Real-time Flight Simulation System Design Based On The Object-oriented Technology

Over the past decades, computer modeling and simulation technology, have made a great advantage on different theories and methods, and been widely applied to the missile-weapon system design and manufacture. The benefits of computer simulation based on mathematical models, partly or even completely instead of physical models, are well understood: higher work efficiency, shorter development cycle, lower cost and more safety. And to meet the need of further research in the development of missile-weapon system, the real-time flight simulation technology has become a hot focus, and the related functional simulation system is in urgent need in those war-industry departments0Considering the characters and requirement of the advanced simulation application, use the popular object-oriented design methodology and modularmodeling technology for reference, an integrated simulation system software frame, including a user model-design method, is studied in detail, The work is mainly carried out as following aspects.(1)The basic theory and design method of the object-oriented technology, as well as the radical concept of modern advanced simulation technology, are analysed. After that, the basic theory of the integrated simulation system combined with modelling-experiment-analysis function is discussed.(2)Based on the object-oriented programming method, an integrated simulation system software is developed to simulate the whole real-time flight control process, and to provide a perfect software environment for the development, debug, digital algorithm test and performance evaluation of the onboard software. The basic function interfaces are complete, and easy to expand. Besides that, its hierarchy makes it easy to separate the user model subsystem from the simulating subsystem. This may allow the user to design his own simulation models, construct his own simulation object subsystem, and then add them into the system project, to realize the whole simulation process.(3)The description, character, and realization of the user model are analyzed. Further more, the reusability of models are discussed, and a solution in terms of data-encapsulation is proposed to solve the problem of how to reuse subsystem modules.(4)Aiming at the requirement of the real-time simulation for some type of missile, considering the current situation of simulation application, a simulationmodel library of the missile system, including the dynamics subsystem, control and guide subsystem of the general air-to-air missile, is set up.The works mentioned above has a great value in engineering practice, as far as it goes, it can improve the simulation efficiency effectively, help the designer concentrate on accurate modeling and then constructing model-system for simulation, by lighten his works on programming.