中文摘要：

A moving-mass control method is introduced to stratospheric airship for its special working condition of low atmospheric density and low speed.The dynamic equation of airship is derived by using the Newton-Euler method and the mechanism of attitude control by moving masses is studied.Then the passive gliding of airship by the moving masses is given based on the theory of glider,and attitude control capability between moving mass and elevator is compared at different airspeed.Analysis results show that the motion of masses changes the gravity center of the airship system,which makes the inertia tensor and the gravity moment vary.Meanwhile,the aerodynamic angles are generated,which results in the change of aerodynamic moment.Control efficiency of moving masses is independent of airspeed.Thus the moving-mass control has the advantage over the aerodynamic surfaces at low airspeed.

英文摘要：

A moving-mass control method is introduced to stratospheric airship for its special working con- dition of low atmospheric density and low speed. The dynamic equation of airship is derived by using the Newton-Euler method and the mechanism of attitude control by moving masses is studied. Then the passive gliding of airship by the moving masses is given based on the theory of glider, and atti- tude control capability between moving mass and elevator is compared at different airspeed. Analysis results show that the motion of masses changes the gravity center of the airship system, which makes the inertia tensor and the gravity moment vary. Meanwhile, the aerodynamic angles are generated, which results in the change of aerodynamic moment. Control efficiency of moving masses is inde- pendent of airspeed. Thus the moving-mass control has the advantage over the aerodynamic surfaces at low airspeed.