共查询到18条相似文献,搜索用时 140 毫秒
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提出了一种改进的基于当前统计的α-jerk目标机动模型,它假设当目标在某一时刻发生机动时,其下一时刻发生机动的取值是有限的.因此它在建立目标机动的运动模型时,就没有必要考虑机动的所有值.为提高对机动目标的位置跟踪精度,采取了在传统α-jerk目标机动模型的基础上增加一项目标机动的均值,即对目标急动进行非零均值建模,并和α-jerk目标模型仿真对比,仿真结果表明,新算法不仅能够实时估计参数α的值,而且与α-jerk目标机动模型相比,其收敛速度更快,对目标位置的状态估计更精确 相似文献
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扩展卡尔曼滤波在目标跟踪中的应用研究 总被引:1,自引:0,他引:1
扩展卡尔曼滤波在非平稳矢量信号和噪声环境下具有广泛的应用,针对机动目标运动模型的特点,采用基于扩展卡尔曼滤波的算法对运动目标进行跟踪处理,该算法首先建立了运动目标的状态模型和观测模型,然后对观测数据进行滤波和误差估计处理,最后通过计算机的蒙特卡洛仿真得到了滤波轨迹和运动目标的距离和角度误差,仿真结果表明,扩展卡尔曼滤波算法具有很好的目标跟踪性能. 相似文献
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机动目标自适应高斯模型与跟踪算法 总被引:4,自引:0,他引:4
提出了一种描述机动目标运动状态的自适应高斯模型,在这种模型中,机动目标的加速度被认为是具有非零均值、时间相关的随机过程,并假定其概率密度函数服从高斯分布。指出了机动目标运动模型的均值和方差与目标机动加速度最佳当前估计值之间的关系,在此基础上,提出了相应的自适应卡尔曼滤波算法。仿真结果表明,该算法对机动目标在不同机动方式下的位置、速度和加速度均有良好的跟踪效果,且所需计算量小。 相似文献
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This article deals with the problem of maneuvering target tracking which results in a mixed linear/non-linear model estimation problem.For maneuvering tracking system,extended Kalman filter (EKF) or particle filter (PF) is traditionally used to estimate the states.In this article,marginalized particle filter (MPF) is presented for application in a mixed linear/non-linear model estimation problem.MPF is a combination of Kalman filter (KF) and PF.So it holds both advantage of them and can be used for mixed linear/non-linear substructure,where the conditionally linear states are estimated using KF and the nonlinear states are estimated using PF.Simulation results show that MPF guarantees the estimation accuracy and alleviates the potential computational burden problem compared with PF and EKF in maneuvering target tracking application. 相似文献
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Models and Algorithms for Tracking of Maneuvering Objects Using Variable Rate Particle Filters 总被引:2,自引:0,他引:2
Godsill S.J. Vermaak J. Ng W. Li J.F. 《Proceedings of the IEEE. Institute of Electrical and Electronics Engineers》2007,95(5):925-952
Standard algorithms in tracking and other state-space models assume identical and synchronous sampling rates for the state and measurement processes. However, real trajectories of objects are typically characterized by prolonged smooth sections, with sharp, but infrequent, changes. Thus, a more parsimonious representation of a target trajectory may be obtained by direct modeling of maneuver times in the state process, independently from the observation times. This is achieved by assuming the state arrival times to follow a random process, typically specified as Markovian, so that state points may be allocated along the trajectory according to the degree of variation observed. The resulting variable dimension state inference problem is solved by developing an efficient variable rate particle filtering algorithm to recursively update the posterior distribution of the state sequence as new data becomes available. The methodology is quite general and can be applied across many models where dynamic model uncertainty occurs on-line. Specific models are proposed for the dynamics of a moving object under internal forcing, expressed in terms of the intrinsic dynamics of the object. The performance of the algorithms with these dynamical models is demonstrated on several challenging maneuvering target tracking problems in clutter. 相似文献
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基于高斯和均方根容积卡尔曼滤波的姿态角辅助目标跟踪算法 总被引:1,自引:0,他引:1
根据目标2维运动速度与姿态角的关系,该文提出一种姿态角辅助目标跟踪算法。在目标运动学基础上建立状态向量中包含姿态角的跟踪模型,实现姿态角对目标跟踪的辅助;针对基于模板匹配姿态角量测的噪声为非高斯情况,将均方根容积卡尔曼滤波引入到高斯和滤波框架下,提出新的高斯和均方根容积卡尔曼滤波算法,提高非线性非高斯处理能力,同时结合目标运动中姿态角的变化规律,建立姿态角分量不同的跟踪模型,通过模型切换实现机动姿态角的滤波。算法对姿态角量测进行滤波,同时实现了姿态角信息与位置信息的有效融合。仿真结果验证了该算法的有效性和正确性。 相似文献