共查询到19条相似文献,搜索用时 171 毫秒
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研究了球坐标系中的目标跟踪,提出了一种基于球坐标系的水下目标运动模型,指出了机动目标运动模型中均值和方差的取值,在此基础上,导出了基于球坐标系的自适应卡尔曼滤波跟踪算法,给出了Monte Carlo仿真实验的结果。结果表明:在球坐标系中,该模型对水下目标的径向距离、方位角、俯仰角及其速度和加速度具有良好的跟踪性能,无须进行目标的机动检测,跟踪算法所需计算量小。 相似文献
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仅有角度量测的红外机动目标跟踪 总被引:5,自引:0,他引:5
针对红外机动目标跟踪仅有角度量测的特点,引入了基于修正球坐标系的扩展Kalman 滤波器,并对目标状态模型及其线性化方程进行了推导,建立了扩展Kalman 滤波方程
组。 相似文献
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采用非零均值相关加速度模型建立火控系统中的Kalman滤波器。通过对残差滤波,建立了新的机动检測器,并由此对机动加速度方差进行调整,从而实现对机动目标的自适应跟踪。文中引入了瞄准线直角坐标系,使Kalman滤波器解耦以减小计算量。仿真的结果表明,所提出的滤波器对机动目标有良好的跟踪性能。 相似文献
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本文提出了基于增量学习神经模糊网络机动目标跟踪模型.当被跟踪目标发生机动时,该模型立刻检测到机动并对卡尔曼滤波器的自适应系统协方差进行精确估计,系统得到及时、正确的补偿.增量学习神经模糊网络能够随着环境变化,自动调整、找到最优的网络结构及参数,当发生机动时,总是能产生接近真实机动值的估计输出,从而提高跟踪性能及避免错误跟踪.仿真结果表明,该模型比传统的机动目标跟踪模型有更好的跟踪性能,并且该模型能动态的适应环境的变化,使系统更加实时,精确的跟踪机动目标. 相似文献
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飞机目标一般沿着圆周路径作机动飞行,因而出现了以圆周运动为基础的跟踪滤波器。本文介绍一种新型坐标系,从而可用一个简单的卡尔曼滤波器跟踪作圆周机动的目标。这种新型坐标系是一个定位于机动中心的极坐标系,导出了以斜距、角度和角速度为状态矢量的跟踪滤波器。与当目标作圆周转弯时以恒定的 x-y 加速度为基础的跟踪方法相比,该算法确使性能得到提高。 相似文献
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一种新的机动目标跟踪的多模型算法 总被引:11,自引:0,他引:11
采用带渐消因子的当前统计模型与匀速运动模型进行交互,设计了一种新的机动目标跟踪的交互式多模型算法。当前统计模型具有对一般机动目标跟踪精度高的特点,通过渐消因子的引入增强了该模型对突发机动的自适应跟踪能力,同时通过与CV模型的交互保证了对非机动目标的跟踪性能。仿真结果表明,在跟踪一般机动目标时,其误差和当前统计模型与CV模型交互的IMM算法相当;在跟踪突发机动目标时,该文算法的误差明显小于当前统计模型与CV交互的IMM算法。 相似文献
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基于标签多伯努利滤波器的机动小目标检测前跟踪 总被引:1,自引:0,他引:1
标签多伯努利(LMB)滤波器在传统多伯努利滤波器基础上引入标签空间,能够实现真正意义上的多目标轨迹级滤波.文章对红外小目标的运动和量测进行建模,将标签多伯努利应用到红外小目标检测前跟踪领域.在此基础上,为了实现对运动模型时变目标的检测前跟踪,将交互式多模型(IMM)与LMB检测前跟踪算法相结合,提出IMM-LMB检测前跟踪算法.此外,给出了该算法的序贯蒙特卡罗实现.仿真结果表明,所提算法能够从输入的原始图像中直接实现轨迹级多目标检测和跟踪,且能够在线更新多模型概率,更好的适应多机动目标场景. 相似文献
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基于直升机目标的运动特点,运用交互式多模型(IMM)算法对直升机目标进行跟踪滤波。对IMM算法作了详细的数学描述,介绍了直升机目标的跟踪流程和IMM算法的具体实现方法。结果证明,IMM算法能够很好地预测出直升机的运动趋势,并能应对机动情况。 相似文献
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Tracking highly maneuverable targets with unknown behavior 总被引:2,自引:0,他引:2
Schell C. Linder S.P. Zeider J.R. 《Proceedings of the IEEE. Institute of Electrical and Electronics Engineers》2004,92(3):558-574
Tracking of highly maneuvering targets with unknown behavior is a difficult problem in sequential state estimation. The performance of predictive-model-based Bayesian state estimators deteriorates quickly when their models are no longer accurate or their process noise is large. A data-driven approach to tracking, the segmenting track identifier (STI), is presented as an algorithm that operates well in environments where the measurement system is well understood but target motion is either or both highly unpredictable or poorly characterized. The STI achieves improved state estimates by the least-squares fitting of a motion model to a segment of data that has been partitioned from the total track such that it represents a single maneuver. Real-world STI tracking performance is demonstrated using sonar data collected from free-swimming fish, where the STI is shown to be effective at tracking highly maneuvering targets while relatively insensitive to its tuning parameters. Additionally, an extension of the STI to allow its use in the most common multiple target and cluttered environment data association frameworks is presented, and an STI-based joint probabilistic data association filter (STIJPDAF) is derived as a specific example. The STIJPDAF is shown by simulation to be effective at tracking a single fish in clutter and through empirical results from video data to be effective at simultaneously tracking multiple free-swimming fish. 相似文献
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Mohammadehsan Hajiramezanali Seyyed Hamed Fouladi James A. Ritcey Hamidreza Amindavar 《ETRI Journal》2013,35(5):849-858
In this paper, we propose a new adaptive single model to track a maneuvering target with abrupt accelerations. We utilize the stochastic differential equation to model acceleration of a maneuvering target with stochastic volatility (SV). We assume the generalized autoregressive conditional heteroscedasticity (GARCH) process as the model for the tracking procedure of the SV. In the proposed scheme, to track a high maneuvering target, we modify the Kalman filtering by introducing a new GARCH model for estimating SV. The proposed tracking algorithm operates in both the non‐maneuvering and maneuvering modes, and, unlike the traditional decision‐based model, the maneuver detection procedure is eliminated. Furthermore, we stress that the improved performance using the GARCH acceleration model is due to properties inherent in GARCH modeling itself that comply with maneuvering target trajectory. Moreover, the computational complexity of this model is more efficient than that of traditional methods. Finally, the effectiveness and capabilities of our proposed strategy are demonstrated and validated through Monte Carlo simulation studies. 相似文献
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