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《Flight Dynamics》 2013-04
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Optimal deorbit research of spacecraft with variable thrust based on hp-adaptive pseudospectral method

FENG Bi-ming,NIE Wan-sheng,ZHENG Gang(Department of Space Equipment,Academy of Equipment,Beijing 101416,China)  
Considering different optimal objects,the hp-adaptive pseudospectral method was used to analyze the comparison of flight parameters when the vehicle deorbit with the control of fixed thrust and variable thrust.The results showed that with the index of minimal fuel,using variable thrust would take more time during transition than using fixed thrust,and could economize little fuel;however,with the index of shortest time,variable thrust could shorten the flying time obviously during transition by consuming more fuel,and was propitious to the spacecraft rapid return with emergency missions.
【CateGory Index】: V448.2
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