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基于時(shí)序向量相似性的空間目標(biāo)群匹配技術(shù)研究
網(wǎng)絡(luò)安全與數(shù)據(jù)治理
張學(xué)文,于興偉,侯鑫宇,姚云鵬,范光明
(解放軍95921部隊(duì),山東濟(jì)南250000)
摘要: 分析了空間低軌目標(biāo)群的運(yùn)行特點(diǎn),提出了基于時(shí)序向量相似性的空間目標(biāo)群匹配算法,提高了對(duì)低軌巨型星座的識(shí)別管理能力。首先,介紹了時(shí)序向量的降維方法,將目標(biāo)群高維觀測(cè)時(shí)序向量簡(jiǎn)化為空間構(gòu)型序列;而后,提出了基于動(dòng)態(tài)時(shí)間規(guī)整(Dynamic Time Warping,DTW)的目標(biāo)群空間構(gòu)型序列相似性判別算法;最后,利用星鏈衛(wèi)星目標(biāo)群仿真和實(shí)測(cè)數(shù)據(jù)對(duì)算法的匹配能力進(jìn)行驗(yàn)證。結(jié)果表明該算法可實(shí)現(xiàn)空間目標(biāo)群監(jiān)測(cè)數(shù)據(jù)快速匹配,仿真數(shù)據(jù)匹配過(guò)程中,在群內(nèi)目標(biāo)缺失30%的條件下匹配成功率可達(dá)100%,在低缺失條件下(缺失率5%以內(nèi))群內(nèi)目標(biāo)識(shí)別成功率平均超過(guò)75%;實(shí)測(cè)數(shù)據(jù)匹配成功率可達(dá)100%。
中圖分類號(hào):TN953文獻(xiàn)標(biāo)識(shí)碼:ADOI: 10.19358/j.issn.2097-1788.2024.02.005
引用格式:張學(xué)文,于興偉,侯鑫宇,等. 基于時(shí)序向量相似性的空間目標(biāo)群匹配技術(shù)研究[J].網(wǎng)絡(luò)安全與數(shù)據(jù)治理,2024,43(2):29-36.
Research on space target group matching technology based on time series vector similarity
Zhang Xuewen,Yu Xingwei,Hou Xinyu,Yao Yunpeng,F(xiàn)an Guangming
The Unit 95921 of PLA, Jinan 250000, China
Abstract: This article analyzes the motion characteristics of loworbit space target groups and proposes a space target group matching algorithm based on time series vector similarity, which improves the recognition and management ability of low orbit satellite constellations. Firstly, this article introduces the dimensionality reduction method of time series vectors, which simplifies the highdimensional observation time series vectors of the target group into spatial configuration sequences. Secondly, an algorithm based on Dynamic Time Warping (DTW) is proposed to identify the phase sequence similarity of observed data of target group. Finally, the matching ability of the algorithm is verified by the simulation and measured data of Starlink satellite target group. The results show that this algorithm can match the observed data of the space target group rapidly. During the simulation data matching process, the success rate of matching can reach 100% under the condition of 30% random missing targets within the group, and the average success rate of target recognition within the group exceeds 75% under low missing conditions (with a missing rate of less than 5%). The success rate of matching real observed data can also reach 100%.
Key words : low orbit space target group; time series vector; dynamic time warping; similarity identify

引言

近年來(lái),全球范圍內(nèi)掀起了低軌互聯(lián)網(wǎng)星座建設(shè)的浪潮,隨著“星鏈(Starlink)”“一網(wǎng)(OneWeb)”等多個(gè)衛(wèi)星星座系統(tǒng)成功入軌,人們對(duì)空間低軌資源使用[1]、低軌巨型星座高效管理[2]等領(lǐng)域產(chǎn)生了極大關(guān)注。低軌巨型星座的快速發(fā)展,導(dǎo)致低軌空間目標(biāo)數(shù)量的迅猛增長(zhǎng),不僅為航天器在軌運(yùn)行、載人航天等活動(dòng)帶來(lái)巨大風(fēng)險(xiǎn)[3],也為空間目標(biāo)編目管理提出了更高的要求。同時(shí),星鏈等低軌星座形成的對(duì)地觀測(cè)、定位、通信、控制等體系能力,對(duì)相關(guān)工作中偵察、判斷、決策等方面產(chǎn)生深刻影響[4-5]。由于“星鏈”等低軌巨型星座發(fā)射頻次高、衛(wèi)星規(guī)模龐大,采用一箭多星方式的發(fā)射入軌[6-7],入軌初期衛(wèi)星以集群方式運(yùn)行在低地球軌道,過(guò)境地基雷達(dá)視場(chǎng)時(shí)通常呈現(xiàn)為復(fù)雜目標(biāo)群形式。群內(nèi)各目標(biāo)在一段時(shí)間內(nèi)保持空間相對(duì)位置固定、速度相似的特點(diǎn),造成目標(biāo)間相互遮擋干擾地基雷達(dá)對(duì)目標(biāo)群的完整觀測(cè)。入軌后,“星鏈”等衛(wèi)星在星載電推力器作用下,將運(yùn)行軌道抬升至目標(biāo)軌道,衛(wèi)星目標(biāo)群在電推力的作用下逐漸散開(kāi)。


作者信息:

張學(xué)文,于興偉,侯鑫宇,姚云鵬,范光明

(解放軍95921部隊(duì),山東濟(jì)南250000)


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