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Frontiers of Information Technology & Electronic Engineering
ISSN 2095-9184 (print), ISSN 2095-9230 (online)
2022 Vol.23 No.12 P.1871-1880
Generalized labeled multi-Bernoulli filter with signal features of unknown emitters
Abstract: A novel algorithm that combines the generalized labeled multi-Bernoulli (GLMB) filter with signal features of the unknown emitter is proposed in this paper. In complex electromagnetic environments, emitter features (EFs) are often unknown and time-varying. Aiming at the unknown feature problem, we propose a method for identifying EFs based on dynamic clustering of data fields. Because EFs are time-varying and the probability distribution is unknown, an improved fuzzy C-means algorithm is proposed to calculate the correlation coefficients between the target and measurements, to approximate the EF likelihood function. On this basis, the EF likelihood function is integrated into the recursive GLMB filter process to obtain the new prediction and update equations. Simulation results show that the proposed method can improve the tracking performance of multiple targets, especially in heavy clutter environments.
Key words: Multi-target tracking; Generalized labeled multi-Bernoulli; Signal features of emitter; Fuzzy C-means; Dynamic clustering
机构：1武汉大学，水资源与水电工程科学国家重点实验室，中国武汉，430072；2武汉大学，水工程科学研究院，中国武汉，430072；3中国电建集团成都勘测设计研究院有限公司，中国成都，610072；4中国电建集团昆明勘测设计研究院有限公司,中国昆明，650051
目的：岩土颗粒材料在不同加载条件下表现出复杂的力学行为，如滞回性。理解和掌握其滞回行为及变形特性是建立具有良好变形预测能力的本构关系的基础。本文旨在研究循环荷载下堆石料的变形特性，分析试样产生残余变形的原因及导致加卸载滞回圈逐渐重合的细观机理，研究不同加载条件（围压、应力水平、加卸载幅度和循环次数）对回弹模量的影响，为建立适用于堆石料的本构关系提供理论指导。
创新点：1.分析循环荷载下堆石料试样产生残余变形的原因，揭示导致加卸载条件下应力滞回圈逐渐靠近并重合的细观机理；2.提出综合考虑围压、应力水平和加卸载幅度影响的回弹模量函数表达式。
方法：1.采用离散元数值模拟方法对堆石料细观模拟参数进行率定，并开展不同加载条件的循环加卸载数值试验（图6和12）；2.研究循环作用下颗粒配位数、孔隙率及颗粒破碎行为，并分析产生残余变形的原因及导致加卸载滞回圈逐渐重合的细观机理（图9）；3.研究不同围压、应力水平、加卸载幅度和加卸载循环次数对塑性应变累积及回弹模量的影响，并提出考虑不同加载条件的回弹模量表达式（公式（14））。
结论：1.循环荷载条件下堆石料宏观应力和体变存在滞回行为，且与围压、应力水平、加卸载幅度和循环次数密切相关。2.堆石料试样中无承载能力的颗粒的数量随循环荷载逐渐增加是产生残余应变的原因；孔隙率随循环次数增加呈缓慢变化并逐渐稳定，在宏观上反映为滞回圈逐渐重合。3.根据围压、应力水平及加卸载幅度对塑性应变累积及回弹模量的影响，提出了综合考虑不同加载条件影响的回弹模量表达式。
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DOI:
10.1631/FITEE.2200286
CLC number:
TN953
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On-line Access:
2022-12-14
Received:
2022-06-30
Revision Accepted:
2022-12-17
Crosschecked:
2022-10-10