Study On Automatic Flight Simulation Of Several Typical Maneuvers

The capability and the security of the aircraft are increasingly emphasized due to the development of the aeronautic technology. As a result the aircraft system becomes more and more complicated. So the flight simulation technology becomes an important instrument in the flight training and the aircraft design. As an important part of the flight simulation technology, automatic flight simulation has advantages such as simple, efficient, and automatic. So it's useful in some fields like the demonstration of the preliminary scheme, the target in the air-to-air combat simulation, and the simulation of Unmanned Aerial Vehicle (UAV) etc. In the paper, the normal situation that pays more attention to the trajectory characters in flight was studied, and a automatic flight simulation system was designed, using the 6 degree-of-freedom (6DOF) aircraft model.First of all, an automatic flight simulation system framework was introduced which consists of four parts: task commands, maneuvering flight library, maneuvering command tracker, and 6DOF aircraft model. The basic element of the maneuvering flight library is the maneuvering command generator, which based on the 3DOF model and producing 3DOF control commands. According to the experiential analysis, the control commands were designed to be subsection linearity of requirement and current parameters. Then the algorithm of the maneuvering command generators was presented in the light of several typical maneuvers. In the following section, the 3 channels' separation of the maneuvering command tracker was discussed according to the 3DOF control commands, and the control structure was chosen. Then the command tracker was designed using the classic root-locus theory. Finally, simulations were conducted in order to demonstrate the effectiveness of the present system. The results show that the control commands generated by the maneuvering command generator is reasonable, and the maneuvering command tracker can trail the commands steadily, rapidly, and exactly.The automatic flight simulation system studied in the present paper can accomplish those typical maneuvers well and accurately. So it could be used for the preliminary analysis of aircraft performance and flying quality, or the target in air-to-air combat simulation. It's helpful to not only get rid of the individual difference, the errors and mistakes of human, but also the flight simulation of the motion and control system of the UAV.