| 引用本文: | 郁春来,占荣辉,万建伟.基于极坐标的稳定UKF单站无源目标跟踪算法研究.[J].国防科技大学学报,2008,30(5):73-79.[点击复制] |
| YU Chunlai,ZHAN Ronghui,WAN Jianwei.Research on Robust UKF Algorithm for Single Observer Passive Target Tracking Based on Polar Coordinates[J].Journal of National University of Defense Technology,2008,30(5):73-79[点击复制] |
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| 基于极坐标的稳定UKF单站无源目标跟踪算法研究 |
| 郁春来1,2, 占荣辉1, 万建伟1 |
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(1.国防科技大学 电子科学与工程学院，湖南 长沙 410073;2.空军雷达学院 信息对抗系，湖北 武汉 430019)
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| 摘要: |
| 单站无源目标跟踪系统中存在着可观测性弱、初始误差大的问题，目标跟踪算法的稳定性和快速收敛性显得尤为重要。结合利用空频域信息的单站无源目标跟踪系统的特点，提出了一种稳定的改进UKF算法，采用一组新的状态变量替代了原有状态变量，选取径向速度作为系统状态量，并将其初始估计误差控制在一定范围内，明显改善了目标跟踪算法的稳定性和收敛性。增加二次采样过程，取代了传统UKF算法的状态变量扩展，降低了算法的计算量，实现更容易。与现有的单站无源目标跟踪算法(如EKF、UKF)相比，算法具有稳定性好、收敛速度快、跟踪误差小的特点，是一种稳定的单站无源目标跟踪算法。数值仿真结果表明了算法的正确性和有效性。 |
| 关键词: 单站无源目标跟踪 跟踪滤波 UKF 极坐标 |
| DOI： |
| 投稿日期：2008-02-01 |
| 基金项目: |
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| Research on Robust UKF Algorithm for Single Observer Passive Target Tracking Based on Polar Coordinates |
| YU Chunlai1,2, ZHAN Ronghui1, WAN Jianwei1 |
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(1.College of Electronic Science and Engineering, National Univ. of Defense Technology， Changsha 410073, China;2.2.Department of Information Countermeasures， Air Force Radar Academy, Wuhan 430019， China)
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| Abstract: |
| A robust target tracking algorithm with fast convergence is very important in single observer passive target tracking system which has inherent disadvantage of weak observability and large initial error. Considering the characteristics of single observer passive target tracking systems via spatial-frequency domain information, a robust improved UKF algorithm is proposed in this paper. Robustness of this algorithm is enhanced by using radial velocity as a state variable and limiting its initial estimating error in a certain bound. A re-sampling process is added to replace the state variables extending of conventional UKF, thus making less computation amount and easier realization. Compared with usual algorithms used in single observer passive target trackings, such as EKF and UKF, the new algorithm is more robust and has faster convergence velocity, lower tracking error. The correctness and validity of the algorithm are comfirmed by the numerical simulation results. |
| Keywords: single observer passive target tracking tracking filter UKF polar coordinates |
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