The optical navigation errors of Mars probe in the capture stage depend closely on which targets are selected to be observed in the Mars system.As for this problem,an integrated navigation scheme is proposed wherein t...The optical navigation errors of Mars probe in the capture stage depend closely on which targets are selected to be observed in the Mars system.As for this problem,an integrated navigation scheme is proposed wherein the optical observation is aided by one-way Doppler measurements.The errors are then analyzed respectively for the optical observation and one-way Doppler measurements.The real-time calculating scheme which exploits the extended Kalman filter(EKF)framework is designed for the integrated navigation.The simulation tests demonstrate that the errors of optical navigation,which select the Mars moon as the observation target,are relatively smaller than those in the Mars-orientation optical navigation case.On one hand,the integrated navigation errors do not depend on the selecting pattern of optical observation targets.On the other hand,the integrated navigation errors are significantly reduced as compared with those in the optical-alone autonomous navigation mode.展开更多
美国国家航空和宇宙航行局(NASA)对火星的探索在不断深化。火星气象卫星的升空将完成两项使命:to study the planet's thin,frigidatmosphere以及 map its barren,rugged landscape.这篇短文遣词很讲究。Trailing a brilliant tongu...美国国家航空和宇宙航行局(NASA)对火星的探索在不断深化。火星气象卫星的升空将完成两项使命:to study the planet's thin,frigidatmosphere以及 map its barren,rugged landscape.这篇短文遣词很讲究。Trailing a brilliant tongue of fire,the rocket streaked skyward and promptlydisappeared from view behind the clouds.一句里的分词短语Trailing a brillianttongue of fire和动词义streaked(skyward)就值得玩味一番。展开更多
基金the National Natural Science Foundation of China(61273090).
文摘The optical navigation errors of Mars probe in the capture stage depend closely on which targets are selected to be observed in the Mars system.As for this problem,an integrated navigation scheme is proposed wherein the optical observation is aided by one-way Doppler measurements.The errors are then analyzed respectively for the optical observation and one-way Doppler measurements.The real-time calculating scheme which exploits the extended Kalman filter(EKF)framework is designed for the integrated navigation.The simulation tests demonstrate that the errors of optical navigation,which select the Mars moon as the observation target,are relatively smaller than those in the Mars-orientation optical navigation case.On one hand,the integrated navigation errors do not depend on the selecting pattern of optical observation targets.On the other hand,the integrated navigation errors are significantly reduced as compared with those in the optical-alone autonomous navigation mode.
文摘美国国家航空和宇宙航行局(NASA)对火星的探索在不断深化。火星气象卫星的升空将完成两项使命:to study the planet's thin,frigidatmosphere以及 map its barren,rugged landscape.这篇短文遣词很讲究。Trailing a brilliant tongue of fire,the rocket streaked skyward and promptlydisappeared from view behind the clouds.一句里的分词短语Trailing a brillianttongue of fire和动词义streaked(skyward)就值得玩味一番。
