本文選題：脈沖星　切入點(diǎn)：單探測(cè)器　出處：《北京航空航天大學(xué)學(xué)報(bào)》2016年06期

【摘要】：傳統(tǒng)的X射線脈沖星導(dǎo)航系統(tǒng)需要同時(shí)觀測(cè)3~4顆脈沖星,有效載荷的質(zhì)量和功耗極大。因此,單探測(cè)器脈沖星導(dǎo)航技術(shù)是實(shí)現(xiàn)航天器利用X射線脈沖星導(dǎo)航的關(guān)鍵舉措。針對(duì)單探測(cè)器脈沖星導(dǎo)航的可觀測(cè)性弱和精度低等問題提出了基于虛擬觀測(cè)值的X射線單脈沖星與星光集中式組合濾波的高精度導(dǎo)航方法,即在X射線脈沖星的長周期內(nèi)增加與星光同時(shí)刻觀測(cè)的虛擬觀測(cè)值,以實(shí)現(xiàn)高精度的集中式組合濾波算法。同時(shí)提出了利用神經(jīng)網(wǎng)絡(luò)預(yù)測(cè)虛擬觀測(cè)值方法,并與利用動(dòng)力學(xué)遞推的方法進(jìn)行比較,精度可以達(dá)到10-7量級(jí)。仿真結(jié)果表明,該方法可大大提高單探測(cè)器的導(dǎo)航的可靠性,補(bǔ)償由于探測(cè)器誤差造成的導(dǎo)航誤差,導(dǎo)航位置誤差為259.79 m,同時(shí)有效地減小了導(dǎo)航系統(tǒng)的重量,為X射線脈沖星導(dǎo)航的工程實(shí)現(xiàn)提供了參考依據(jù)。
[Abstract]:The traditional X-ray pulsar navigation system needs to observe three or four pulsars at the same time. The mass and power consumption of the payload is extremely high. Single detector pulsar navigation technology is a key measure to realize spacecraft navigation using X-ray pulsars. Aiming at the problems of weak observability and low precision of single detector pulsar navigation, this paper puts forward a method of X-ray based on virtual observations. A High Precision Navigation method based on combined filtering of Line Monopulse and Starlight, In the long period of X-ray pulsars, the virtual observations at the same time as the stars are added to achieve a high precision combined filtering algorithm. A neural network method is proposed to predict the virtual observations. The simulation results show that this method can greatly improve the navigation reliability of a single detector and compensate for the navigation error caused by the error of the detector. The navigation position error is 259.79 m, and the weight of the navigation system is reduced effectively, which provides a reference for the engineering realization of X-ray pulsar navigation.
【作者單位】： 北京航空航天大學(xué)宇航學(xué)院;北京航天自動(dòng)控制研究所;
【基金】：國家自然科學(xué)基金(51275027)~~
【分類號(hào)】：V448.2

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本文編號(hào)：1656914