Working Parameters Research of Ram-air Pneumatic Rudder under Vacuum Conditions

The paper generalizes the research actuality and developing trend of rudder at home and abroad, demonstrates steady state fit-itself technique of ram-air pneumatic rudder under vacuum conditions. Aiming at dynamic characteristic of the vacuum air, the paper establishes the control moment equation, puts forward the improving measure. The paper establishes flight speed equation of the missile, pressure equation of the rudder low-pressure chamber and pressure equation of the cylinder, and simulates the equations using Matlab software. Simulation results indicate: the flight speed of missile and the atmospheric pressure are two dominating factors which affect the working conditions of the ram-air pneumatic rudder. In virtue of flighting speed of the missile, ram-air pneumatic rudder can attain controlling energy sources from vacuum air directly.