ID 原文 译文
9454 最后利用实例分析验证了所提粒度约简方法的正确性。 Finally using instance analysis verify the validity of the proposed particle size reduction method.
9455 基于交会对接地面物理仿真系统对卫星交会对接中相对姿态和位置的控制问题进行研究,根据地面物理仿真系统的结构推导出描述系统姿态和位置运动的耦合六自由度动力学模型;‭ Based on rendezvous and docking ground physical simulation system for satellite rendezvous and docking relative posture and position control problem is studied, according to the ground physical simulation system structure is deduced to describe system posture and position of movement of the six degrees of freedom coupling dynamic model; ‭
9456 基于此模型,在存在外部扰动的情况下,采用自适应快速非奇异终端滑模控制思想设计一种能够克服传统终端滑模控制奇异问题的鲁棒有限时间控制器。 Based on this model, in the presence of external disturbances, the idea of adaptive fast nonsingular terminal sliding mode control to design a can overcome the traditional terminal sliding mode control of singular problem of robust finite time controller. ‭
9457 通过李雅普诺夫理论推导和仿真分析表明,该控制器在保证系统的有限时间稳定性和收敛性的同时能有效地抑制外部扰动。 By lyapunov theory derivation and simulation analysis show that the controller in the guarantee system stability and convergence of the finite time can effectively restrain the disturbance at the same time.
9458 卫星通信信号中90%以上采用相位或幅相联合调制方案,包括多进制相位键控(multiple phase shift keying,MPSK),多进制正交幅度调制(multiple quadrature amplitude modulation,MQAM),多进制幅相键控(multiple amplitude phase shift keying,MAPSK)等,此外短波通信、移动通信中MPSK也是最常用的信号类型之一。 More than 90% used in satellite communication signal phase or amplitude phase modulation scheme, including multi-band phase shift keying (multiple phase shift keying, MPSK), multi-band orthogonal amplitude modulation (multiple quadrature amplitude modulation, MQAM), multi-band amplitude phase shift keying (multiple amplitude phase shift keying, MAPSK), etc., in addition to all this short-wave communications, mobile communications MPSK is also one of the most common type of signal.
9459 载波同步是信号解调中十分关键与核心的部分。 Carrier synchronization is crucial in signal demodulation with the core part.
9460 针对非合作接收条件下幅相调制类信号星座图分布特性进行了深入研究,提出了一种基于星座图密度统计的载波同步算法,实现了一定信噪比条件下盲频偏消除与星座图恢复。 For non-cooperative receiving amplitude under the condition of phase modulation type of signal constellation diagram distribution characteristics were studied, put forward a kind of carrier synchronization algorithm based on constellation diagram density statistics, achieved a certain SNR blind deviation elimination and the constellation diagram.
9461 此方案不需要预先进行调制识别,对数据量要求不高,复杂度低,抗噪性能好,可广泛应用于常规信号以及未知、猝发信号解调。 This scheme does not need for modulation identification in advance, the volume of data is not high, low complexity, antinoise performance is good, can be widely used in the conventional signal and unknown, burst signal demodulation.
9462 仿真表明,在接近或高于解调信噪比的条件下,该方法频偏估计性能接近克拉美罗限,可应用于工程实践。 Simulation show that the close to or higher than that of demodulation SNR conditions, the method of frequency offset estimation performance is close to g Latin America limit, can be applied to engineering practice.
9463 为了研究滑翔飞行器再入过程中的侧向机动问题,A*算法的相关理论被引入到轨迹规划中。 In order to study the glide vehicle lateral mobility problem in the process of reentry, the related theory of A * algorithm is introduced to the trajectory planning.