ID 原文 译文
13944 最后利用灰度理论从映射组合中选出最优组合作为精细互联结果,并利用 Kalman 滤波完成编队内各目标航迹的状态更新。 Finally, the optimal combination among these mapping combinations is chosen as the refined correlation result by utilizing the gray theory, and then the state update of the tracks of each target inside the formation is completed by using the Kalman filter.
13945 经仿真验证,与传统多目标跟踪算法中性能优越的结构化分支多假设( SB-MHT) 算法相比,该算法在跟踪精度、实时性以及有效跟踪率等方面性能优势显著,同时具有良好的工程适用性。 The simulation results show that compared with the Structure Branch Multiple Hypothesis Tracking ( SB-MHT) algorithm which has superior performance in the traditional muti-target tracking field, this algorithm has better performance in tracking accuracy real-time performance and the effective tracking rate. Moreover, this algorithm has excellent engineering applicability.
13946 为了研究雷达高度表相对于地面运动时天线主瓣照射区内多普勒谱分布规律,建立了大地回波宽多普勒带模型,利用基于等多普勒带、等距离环的网格映像法将波束照射区划分为若干矩形散射网格,采用等多普勒带内各矩形网格回波功率叠加的方法对回波多普勒功率谱进行仿真。 In order to obtain the law of Doppler spectrum distribution in the area radiated by the antenna's mainlobe when the radar altimeter moves relative to the ground, a wide-band Doppler echo model is established, and the beam irradiation area is divided into several rectangular scattering grids by using the grid mapping method based on the equal Doppler band and the equal distance ring. The simulation of echo Doppler power spectrum is conducted by using the method of echo power superposition of each rectangular grid in the equal Doppler band.
13947 克服了基于极坐标积分法计算繁琐且不利于后续工程实现的缺点,仿真结果与理论值相符,表明模型合理。 It overcomes the shortcomings of complicated calculation based on the polar- coordinate integration method, which is not conducive to the subsequent engineering realization. The simulation results are consistent with the theoretical values which shows that the model is reasonable.
13948 最后分析得出了雷达高度表在不同高度及速度下多普勒谱分布规律,为后续雷达高度表的回波模拟提供了理论支撑。 Finally, the law of Doppler spectrum distribution of the radar altimeter at different altitudes and speeds is obtained, which provides a theoretical support for the subsequent echo simulation of the radar altimeter.
13949 在空战中往往存在目标会根据当前战场态势提前做出机动的情况,使得传统空空导弹战术攻击区并不能准确地、完全地反映出当前时刻攻防态势,提出了一种基于目标机动预测的战术攻击区仿真方法,通过建立导弹三自由度数学模型、有限外推的目标机动预测模型以及导引律模型进行攻击区仿真分析。 In air combat, the target often performs maneuver in advance based on the current battlefield situation, so that the traditional tactical attack zone of air-to-air missiles cannot fully and accurately reflect the current attack /defense situation. This paper proposes a simulation method of the tactical attack zone by predicting target maneuver. The mathematical three-degree-of-freedom model of the missile, the model with limited extrapolation for target maneuver prediction and the model of the guidance law are established respectively to simulate the attack area.
13950 结果表明,通过预测目标机动方式对攻击区进行提前修正能够使飞行员及早掌握敌我态势的变化,做出决策判断,尽快完成 OODA 环,也为后续决策提供了有效的辅助信息。 The results show that, the early correction of the attack area through the predicted target maneuver mode enables the pilot to grasp the changes of battlefield situation of the two sides, make the right decision, and complete the OODA loop as soon as possible, which also provides effective auxiliary information for the subsequent decision.
13951 针对导弹拦截机动目标有限时间约束问题,在末端制导阶段,考虑自动驾驶仪动态延迟特性建立弹目拦截系统数学模型,对于传统终端滑模导引律存在的奇异问题导致的导弹制导稳定性差等问题,提出了基于改进的扩张状态观测器的新型非奇异终端滑模导引律。 To solve the problem of finite-time constraints when the missile intercepts a maneuvering target in the terminal guidance stage the mathematical model of the target interception system is established considering the dynamic delay of the autopilot. To solve the problem of poor guidance stability caused by the singularity of the traditional terminal sliding mode guidance law a new non-singular terminal sliding mode guidance law based on the improved Extended State Observer ( ESO) is proposed.
13952 该方法能够确保视线( LOS) 角速率在有限时间内收敛到零,且在平衡点处快速收敛;为了避免传统的扩张状态观测器( ESO) 导致的曲线非光滑情况,通过改进扩张状态观测器准确估计外部扰动,并对系统进行状态补偿。 This method ensures that the Line-of-Sight ( LOS) angular rate converges to zero in a finite time and converges quickly at the equilibrium point. In order to avoid curve chatter caused by the traditional ESO an improved ESO is adopted to accurately estimate external disturbances and compensate for the system’s state.
13953 设计地空导弹模型进行仿真验证,结果表明,该方法不但缩短了系统收敛时间,还提高了地空导弹制导精度。 A model of the surface-to-air missile is designed for simulation verification. The simulation results show that this method not only shortens the system’ s convergence but also improves the guidance precision of the surface-to-air missile.