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水下航行器的导航精度试验与航路的设计关系密切,为了找出最佳的试验航路,以得到真实可信的导航精度,该文通过对导航系统采用多普勒计程仪加光纤陀螺罗盘或惯导系统的仿真,分别计算直线航路、闭环航路和开环航路情况下的导航精度,以确定不同航路设计对导航精度的影响。仿真结果表明,由于导航系统的误差在环形航路中会互相抵消,使得环形航路试验得到的导航精度偏小,这与试验的本意相违背;而直线航路试验不受此影响,得到的导航精度较环形航路的大,是最接近真值的。本文首次提出了用仿真计算确定水下航行器试验航路的方法,可为水下航行器试验航路的选择提供依据。 相似文献
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A measurement system has been developed based on high-precision printed probes in printed circuit board (PCB) and steep rising-time probe adapters,which can be applied to study the expansion uniformity of armature in a helical magnetic flux compression generator (HFCG).The influences of wall thickness and initiation position on the expansion uniformity of armature in HFCG were experimentally investigated.The results show that the armature with thinner wall thickness will easily rupture due to the high pressure of detonation products inside,the armature with larger wall thickness will easily crack due to the tensile stress on the outer surface of the wall,the influence of the end effect on the expansion uniformity can be ignored if the distance between the first group of probe and the initiation point is more than 3 times the armature diameter. 相似文献
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High-power precise delay trigger/ignition system is a programmable pulse generator developed for experiment controlling in explosively driven magnetic flux compression generators. Precise delay pulses are generated by the digital circuit, after being magnified and sharpened through multistage isolated amplifiers and rising edge sharpening device, high-voltage steep delay pulses with precision less than μs level are obtained. This system has been used in our compact magnetic flux compression generator experiments in place of the traditional primaeord delay device. 相似文献
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<正>交频分复用(Orthogonal Frequency Division Multiplexing,OFDM)通信技术由于具有频谱利用率高、抗多径能力强等优点,成为当前水声通信的研究重点和热点。在保证鲁棒性能的前提下,为了能够进一步提高其吞吐量,将叠加编码(Superposition Coding,SC)技术应用于水声OFDM通信系统中,在保证基本信号的同时获得额外的信息。仿真结果和水池实验结果表明:通过选择合适的功率分配因子,叠加编码在保证两路信号误比特率性能的前提下,可以提高系统的吞吐量,具有很好的应用前景。 相似文献
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从水雷可靠性指标的分布入手,分析了双方风险及其分担的原则,提出了水雷可靠性样本量的确定方法,解决了最小成功数的问题,对影响样本量的因素进行了分析,探讨了鉴别比在不同取值下,对试验的影响。 相似文献