本文選題：星間鏈路 + 自主定軌��； 參考：《測繪科學(xué)技術(shù)學(xué)報》2016年05期

【摘要】：針對導(dǎo)航星座自主定軌,提出一種提高集中式算法效率的新思路,即充分利用高頻、高精度的星間鏈路測距信息,在短弧內(nèi)將衛(wèi)星最優(yōu)軌道與長期預(yù)報軌道的差異用多次曲線描述,得到衛(wèi)星位置和速度的最佳估值。此方法無需動力學(xué)建模和計算狀態(tài)轉(zhuǎn)移矩陣,因此算法極為簡潔。同時,對于自主運(yùn)行期間缺乏空間基準(zhǔn),提出約束軌道升交點(diǎn)赤經(jīng)的方法,以減小對地面系統(tǒng)的依賴程度。仿真結(jié)果表明,導(dǎo)航星座自主運(yùn)行60 d,不考慮地球自轉(zhuǎn)參數(shù)(EOP)長期預(yù)報誤差,在無錨固站的情況下,鏈路數(shù)不少于5條時能夠達(dá)到軌道URE優(yōu)于1 m,位置3 m,速度毫米級的定軌精度。最后,通過比對驗(yàn)證了新算法比已有EKF分布式自主定軌算法的效率更高。
[Abstract]:In view of autonomous orbit determination of navigation constellation, a new idea to improve the efficiency of centralized algorithm is proposed, which is to make full use of high-frequency and high-precision intersatellite link ranging information. In the short arc, the difference between the optimal satellite orbit and the long term forecast orbit is described by multiple curves, and the best estimation of the satellite position and velocity is obtained. This method does not require dynamic modeling and calculation of state transition matrix, so the algorithm is very simple. At the same time, for the lack of space datum during autonomous operation, a method of constraining orbit elevation and intersection red longitude is proposed to reduce the dependence on the ground system. The simulation results show that the navigation constellation operates independently for 60 days, and the long-term prediction error is not taken into account in the earth rotation parameters (EOPs). In the case of no anchoring station, When the number of links is not less than 5, the orbit determination accuracy of orbit URE is less than 1 m, position is 3 m and speed is millimeter. Finally, the comparison shows that the new algorithm is more efficient than the existing EKF distributed autonomous orbit determination algorithm.
【作者單位】： 北京衛(wèi)星導(dǎo)航中心;
【基金】：國家自然科學(xué)基金項(xiàng)目(11103068) 國家科技基礎(chǔ)性工作專項(xiàng)(2015FY310200)
【分類號】：P228.4

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