Abstract: Abstract：The rudder system is an important part of the control of the attitude during the maneuvering of the supersonic reentry vehicle, and the flutter characteristic analysis is the key link to ensure the successful development of the model and the flight test. In this paper, the flutter vibration characteristics of the rudder surface are analyzed by using the local piston flow theory. Firstly, the dynamic equation of the rudder system is established to determine the critical boundary calculation method of rudder surface flutter. Then, the finite element method (FEM) and modal test is used to determine the modal parameters of the rudder surface under different combination conditions of different rudder angel and different loading level. Finally, the critical parameters of rudder surface flutter are determined by flutter analysis, which provides technical support for the design and optimization of rudder system structure.  

Key words: Keywords：rudder system, reentry vehicle, flutter characteristic analysis, local piston flow theory, modal test, critical parameters