Simulation plays an increasingly important role in the design, testing and analysis of modern aircraft. The diversity and complexity of aircraft systems make aircraft simulation modeling and software development increasingly complex. Aircraft simulation, like other system simulations, is divided into three types: mathematical simulation, semi-physical simulation and physical simulation according to the composition of the simulation test system.

System simulation technology is based on similar principles, information technology, system technology and related professional technologies in its application fields, using computers and various physical effect equipment as tools, and using system models to conduct experimental research on actual or imagined systems. Door comprehensive new technology. System simulation technology is widely used in aviation, aerospace, military, electronics, communications and many other fields. With the wide application of computers, various application fields have put forward many requirements for system simulation, the most important of which are the following three aspects:

(1) The reliability and accuracy of the simulation results;

(2) Efficiency of modeling and simulation;

(3) The flexibility of the model.

The modeling of aircraft control objects is the basis for the study of flight control systems. The main function is to simulate the aerodynamic characteristics of the aircraft and solve the six-degree-of-freedom nonlinear equation of motion of the aircraft.

Aircraft simulation, like other system simulations, is divided into three types: mathematical simulation, semi-physical simulation and physical simulation according to the composition of the simulation test system. Since mathematical simulation is not limited by the existence of products, it can be applied to the development of aircraft.

The whole process, but more applied to the conceptual design stage of the aircraft. With the increasing recognition of the important role of the conceptual design stage in the entire life cycle of an aircraft, aircraft designers at home and abroad have gradually realized that the quality of the conceptual research stage should be vigorously improved. Because of this, the research on various types of aircraft optimization design technology that has arisen since the 1970s has always been a hot spot in the field of aircraft research. Design Parameters. The research upsurge of multi-disciplinary design and optimization of aircraft since the 1990s is essentially the research category of full-system mathematical simulation of aircraft based on the idea of large systems. The hardware-in-the-loop simulation and physical simulation are used in the preliminary design stage and the detailed design stage of the aircraft. Mathematical simulation, hardware-in-the-loop simulation and physical simulation complement each other. Which simulation to use in the process of aircraft development depends on the purpose, content and conditions of the research.

Simulation plays an increasingly important role in the whole life cycle of modern aircraft, and the diversity and complexity of aircraft systems make the development of simulation software increasingly complex, and the requirements for software development are getting higher and higher. Traditional modeling and simulation system development methods can no longer meet the development requirements of complex software systems, and it is difficult to guarantee software quality. In the development process, problems such as low efficiency, chaotic structure, repetitive development, poor understandability and maintainability are especially exposed. Prominently, the reuse of software has been at a very low level; and the object-oriented method provides a good technical means to overcome these problems.