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针对异地配置下的2D雷达与红外传感器航迹关联难的问题,论文提出一种基于假设检验的异类传感器航迹关联算法,该方法利用2D雷达距离、方位与红外传感器方位、仰角的互补性,通过假设条件建立目标关键因子的相似度模型,再通过相似度判断检验假设条件是否成立,以达到目标关联的目的。仿真实验结果表明了该方法关联的正确性。 相似文献
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泰利斯海军法国分公司新研的MRR-3D新一代(NG)轻型三坐标监视雷达,是由泰利斯公司早期研制的MRR-3D雷达改装而来。 相似文献
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介绍了舰船雷达散射截面(RCS)预估的方法及舰船RCS预估的理论基础——电磁场高频方法,并给出了用3D建模软件构建一些舰船几何模型与RCS计算结果。 相似文献
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论述了一种雷达信号模拟器的设计及实现,该系统采用软硬件相结合的方法,通过仿真模型实时解算雷达侦察设备收到的每个雷达脉冲描述字,通过硬件电路控制射频信号的实时输出。 相似文献
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基于模糊综合评判的雷达抗干扰效能评估研究 总被引:1,自引:0,他引:1
针对雷达抗干扰效能指标的随机性和模糊性,运用模糊综合评判方法对雷达抗干扰效能进行综合评估,建立了综合评估模型,并给出了评估实例。 相似文献
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阐述了舰载米波搜索雷达天线阵转动时多的目标回波信号的模型及最大似然法实现舰载米波搜索雷达天线阵转动时多目标回波信号的方向估计,提出了方向估计的神经网络方法,仿真结果表明了此方法的有效性。 相似文献
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在测量雷达中,由于采用了低重频,当fr〈2×Fd时,就产生了Fd的测量模糊。文章对不变量嵌入法和线性估计法两种速度消模糊方法进行了介绍。并通过仿真,对比两种方法在非滑窗方式和滑窗方式下消速度模糊的效果,得出线性估计法是一种能够快速准确解速度模糊的方法的结论。 相似文献
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本文阐述了舰载米波雷达天线阵转动时多目标回波信号的模型,提出了采用模拟退火线性优化神经网络实现舰载米波搜索雷达天线阵转动时多目标回波信号的方向估计。仿真结果表明该是有效的,并且具有速度高、准确的优点。 相似文献
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为了提高单脉冲末制导雷达的抗质心干扰能力,结合信号到达方向(DOA)的极大似然估计法和卡尔曼滤波,提出了一种新的算法。首先,在假设目标和干扰数量、参数已知的情况下,建立雷达多次接收信号匹配滤波后跟踪回波附近的多个相邻采样点的似然函数。其次,计算得到目标和干扰信号DOA、延迟和功率的极大似然估计,并应用最小描述长度(MDL)准则判断目标和干扰数量。最后,设计了合适的卡尔曼滤波器用于正确跟踪目标。仿真结果验证了算法的有效性。 相似文献
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Hiroshi Kawabe 《Journal of Marine Science and Technology》2002,6(3):135-147
This report is concerned with the statistical analysis of the long-term distribution of a wave-induced load, and examines
which factors influence the long-term distribution of the load level, e.g., the significant wave height, the mean wave period
of the supposed wave condition, and the relative angle between the ship's course and the wave direction. The long-term distribution
is broken down into these factors, and a contribution rate analysis method for each factor in each load level in the long-term
distribution is introduced. Based on the method used, the contribution rate of a specific mean wave period and a wave angle
encountered is clarified, when the long-term distribution is larger than other wave periods and wave angles. The specific
mean wave period and wave angle encountered are defined as the wave condition which governs the long-term distribution. The
maximum wave-induced load in the vicinity of a probability of exceedance of around 10−8 in the long-term distribution is decided by the most severe short-term wave condition which has the largest significant wave
height with a specific mean wave period. Based on S–N curves and Miner's rule, the relation between the fatigue damage and the supposed wave condition is examined. The contribution
rate analysis method for fatigue damage is introduced. The governing wave condition and the most severe short-term wave condition
also have an important effect on the fatigue damage. A simple estimation method for the long-term distribution, described
by the Weibull distribution from the statistical properties of the most severe short-term wave condition, is introduced. Several
examples show the applicability of the estimation method.
Received: November 22, 2001 / Accepted: January 9, 2002 相似文献
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VTS中雷达和AIS信息融合算法探讨 总被引:1,自引:0,他引:1
提出VTS中雷达和AIS信息时间统一性的算法,采用K近邻域法和基于统计的加权估计法对雷达和AIS信息进行相关判别和融合,提高了VTS对目标的跟踪性能和可靠性。 相似文献
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文章针对雷达方程,分析了海洋环境因素对机载雷达探测距离的影响,建立了雷达探测距离误差模型,为机载雷达性能的判断和目标的检测提供了参考。 相似文献
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施闻明 《船舶与海洋工程学报》2010,9(1):105-108
The accuracy of parameter estimation is critical when digitally modeling a ship. A parameter estimation method with constraints
was developed, based on the variational method. Performance functions and constraint equations in the variational method are
constructed by analyzing input and output equations of the system. The problem of parameter estimation was transformed into
a problem of least squares estimation. The parameter estimation equation was analyzed in order to get an optimized estimation
of parameters based on the Lagrange multiplication operator. Simulation results showed that this method is better than the
traditional least squares estimation, producing a higher precision when identifying parameters. It has very important practical
value in areas of application such as system identification and parameter estimation. 相似文献