共查询到12条相似文献,搜索用时 46 毫秒
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In order to recognize the jamming pattern in anti-jamming, a novel fuzzy jamming recognition method based on statistic parameters of received signal’s power spectral density (PSD) is proposed. It exploits PSD’s shape factor and skewness of received signal as classified characters of jamming pattern. After the mean center and variance of each jamming pattern are calculated by using some jamming samples, an exponential fuzzy membership function is used to calculate the membership value of the recognized sampl... 相似文献
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As only a little information can be obtained from torpedo's lake and sea tests, and the torpedo's life does not distribute typically. If conventional methods are used to convert the environment factor for torpedo's lake and sea tests, their results can not reflect the actual conditions. A conversion model of the environment factor for torpedo's lake and sea tests is set up based on the GM(1,2) model of the grey system theory. For the merit of the grey system, the problem of uncertain life distributions and few samples can be solved. The calculation results show that the method is easy, realistic and high precise. 相似文献
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In order to extract the feature information of ultra wide-band (UWB) radio fuze target and give full play to the warhead’s strike ability, a method based on polar Hough transform for scattering centers extraction of the target was proposed in this paper. It firstly utilized the fuze scanning to obtain the distance and azimuth information of the target’s main scattering centers at different times, i.e. the track information of scattering centers under the polar coordinates, then used the polar Hough transform to transform the track into the parameter space in order to accumulate the dots and drew 3-D parameter space diagram, in which the peak points corresponded to the target’s scattering centers. The simulation results indicate that the method can not only extract scattering centers efficiently and accurately, but also has strong anti-noise performance, and the algorithm is simple and easy to be implemented in engineering. 相似文献
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本文针对航天器飞行状态的工况识别和故障诊断问题,提出了征兆向量和模糊征兆向量的概念,在此基础上给出了一种航天器工况和故障的模糊模式识别的方法,并对三种故障进行了诊断和验证. 相似文献
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红外有源干扰技术分析 总被引:5,自引:1,他引:4
采用红外有源干扰技术,可以有效地对抗红外导弹,确保已方平台安全。红外有源干扰技术包括红外干扰弹、红外干扰机、定向红外对抗和激光致盲等。并分析了各种红外有源干扰技术的工作原理,以及其现状和发展趋势。 相似文献
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