ID 原文 译文
48256 仿真实验验证了所提算法的可行性和有效性。 Simulation results verify the feasibility and effectiveness of the proposed algorithm.
48257 在实效性要求高的空间操控任务中,脉冲轨道的优化设计必不可少。 In high efficiency requirements of space control tasks, the pulse track optimization design is necessary.
48258 针对脉冲轨道转移和交会的优化设计问题,基于hp自适应伪谱法设计一种通用方法,以直接法计算为主,综合使用间接法主矢量理论交互式规划出最优N脉冲轨道的机动方案。 For the optimal design of the impulse orbit transfer and exchange, based on HP adaptive pseudo spectral method to design a general method, give priority to with direct method to calculate, using the indirect method of main vector theory interactive planning out the optimal N pulse orbit maneuver.
48259 该方法以hp自适应伪谱法直接求解首末端双脉冲机动,依据间接法最优脉冲机动满足的主矢量必要条件进行检验,通过增加脉冲或者首末端漂移进行交互式规划,逐步确定出最优脉冲数目N的值,再采用hp自适应伪谱法求解出各脉冲速度增量的矢量与施加时刻,获得脉冲轨道的优化设计。 The method with HP direct adaptive pseudo spectral method is used to solve the end of the first double pulse motor, on the basis of the indirect method, the optimal pulse motor satisfy the main vector of necessary conditions, by increasing the pulse or the end of the first drift for interactive planning, step by step to determine the value of the optimal pulse number N and HP adaptive pseudo spectral method is used to solve the vector and applying time of each pulse velocity increment for optimization design of pulse orbits.
48260 提供2个仿真场景算例,求解过程和结果表明,该方法对初值敏感度小、鲁棒性强、收敛快、实用有效,可以便捷处理脉冲轨道的优化设计问题。 With two simulation examples, solving process and the results show that this method is sensitivity to initial value is small, strong robustness, fast convergence, practical and effective, and can easily deal with pulse track optimization design problem.
48261 在采用相干解调方法进行接收时,正弦型非线性切普键控(sine non-linear chirp keying,SNCK)信号受相位误差和多普勒频移影响较大,针对此问题提出一种将其近似为分段线性调频(linear frequency modulation,LFM)信号,采用分数阶傅里叶变换(fractional fourier transform,FRFT)进行解调的非相干解调方法。 When using coherent demodulation method for receiving, sine type nonlinear cutting PuJian control (going non - linear chirp keying, SNCK) signal is affected by the phase error and doppler shift is larger, aimed at this problem put forward a kind of approximate his for piecewise linear frequency modulation (linear frequency modulation, LFM) signal, the fractional Fourier transform, fractional Fourier transform, the FRFT) for demodulation of noncoherent demodulation method.
48262 将FRFT解调方法与经典相干解调方法进行对比,通过理论推导和仿真分析发现,在严格同步条件下,SNCK信号相干解调性能优于FRFT解调方法,并且信号码元长度对FRFT解调性能有微弱的影响。 The FRFT demodulation method is compared with classical coherent demodulation method, through theoretical derivation and simulation analysis, found that under the condition of strictly synchronous, SNCK coherent demodulation performance is better than that of FRFT signal demodulation method, and the length of the signal element FRFT demodulation performance has a weak impact.
48263 但FRFT解调不受相位误差的影响,且具有相对较高的抗多普勒频移能力。 But the FRFT demodulation is not affected by the influence of the phase error, and has relatively higher ability to resist doppler frequency shift.
48264 双基地多输入多输出(multiple-input multiple-output,MIMO)雷达可利用直达波进行幅相误差校正,但当直达波方向测量不准时,现有的校正算法性能会严重恶化。 Double base multiple input multiple output (multiple input multiple output, MIMO) radar can use direct wave amplitude phase error correction, but is not allowed when the direction of the direct wave measurement, the existing correction algorithm performance will be seriously deteriorated.
48265 针对此问题,提出了一种新的基于子空间的旋转阵列幅相误差校正算法。 Aiming at this problem, this paper proposes a new based on subspace rotation array amplitude-phase error correction algorithm.