Design Of Cross Region Orbit For Ultra Low Orbit Micro/nano Vehicle

In order to deal with the sudden natural environment disasters more quickly and achieve the rapid arrival of the on orbit vehicle over the target area,this paper designs a kind of cross domain flight orbit between the space and the adjacent space for the ultra-low orbit micro nano vehicle,which will greatly improve and enhance the safety,rapidity and accuracy of the mission of the ultra-low orbit vehicle in the complex spaceBased on the research background of the spacecraft in the space ultra-low orbit,this paper designs a kind of orbit which can make the spacecraft fly in the space and the adjacent space.This orbit is the joint control of the orbit and the attitude of the spacecraft.In this orbit,the ultra-low orbit micro/nano vehicle will first change its orbit from a certain position of the original orbit to a transitional orbit surface through a different plane.In this transitional orbit plane,the attitude changes according to the appropriate guidance law,flying from space to the adjacent space.When it is close to the target,the aircraft performs a balanced glide motion to monitor the natural environment of the target area.after leaving the target,it adjusts according to the appropriate attitude,so as to complete the final entry from the adjacent space to the ultra-low orbit in space Track processThis paper mainly designs the flight process and control mode of the cross domain orbit of the ultra-low orbit micro nano vehicle,establishes the appropriate orbit dynamics model,and simulates the launching process and the cross domain flight process of the ultra-low orbit micro nano vehicle with MATLAB software,which verifies the rationality and feasibility of the cross domain orbit.And for the stagnation point heat flow,dynamic pressure and overload of the cross domain flight process.At last,the paper analyzes the factors that affect the simulation flight of the aircraft,that is,the initial speed and the initial velocity angle of the first cross domain flight,and uses the software MATLAB to simulate the influence factors of the orbit,and analyzes the influence degree of each factor on the cross domain orbit design.