Scheme assumption and disposal strategy study of asteroid dynamic push away based on solar electric propulsion
Near-Earth asteroids pose a potential impact threat to the Earth,and how to effectively and controllably implement defense programs has become a hot issue in recent years.The dynamic push away disposal method using electric propulsion can change the orbit of the asteroid in a sustained manner,making it possible to control the deflection of the asteroid.In order to meet the needs of asteroid defense deflection in the future,this study proposes a distributed asteroid dynamic push away disposal scheme based on solar electric propulsion.Through the distributed deployment of energy system and propulsion system,the comprehensive efficiency optimization of energy supply and orbit deflection is realized.On the basis of this scheme,three kinds of attached deployment and deflection disposal strategies are proposed for asteroids with different rotation characteristics,and the effects of electric propulsion switch threshold angle,thrust vector adjustment,and other parameters on asteroid deflection effect are compared and analyzed.It is found that the dynamic push away disposal strategy based on solar electric propulsion can deflect near-Earth asteroids with the size of 100 m,and this study can provide a reference for near-earth asteroid defense.
asteroid defensedynamic push awaysolar electric propulsionorbital deflection
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