ID 原文 译文
14445 在算法中采用双门限检测,进一步减弱了噪声不确定度对检测性能的影响,提高了频谱感知性能。 Double-threshold detection is also presented to reduce the impact of uncertain noise on detection performance.
14446 目前用于机载前舱卫星通信的L频段终端系统设备,全部是由国外厂商提供,且多采用平面阵或机械扫描的方式。 All the currently-used L-band terminal system equipment for airborne forward compartment satellite communication is provided by foreign manufacturers,and most equipment adopts planar array or me- chanical scanning mode,which has no advantages in size and weight.
14447 提出"屋顶"形天线阵列来实现超低仰角覆盖,设计并研制了L频段机载前舱卫通相控阵天线样机。 The“roof" antenna array is proposed to achieve ultra-low elevation coverage,and the L-band airborne forward hatch satellite phased array antenna prototype is designed and developed.
14448 地面静态对星试验结果表明,天线样机可与海事卫星实现稳定通信,通信速率为310 kb/s,通信质量良好。 The results of ground static correspondence experiment show that the antenna prototype can realize stable communication with the maritime satellite. The communication rate is 310 kb/s,and the communication quality is good.
14449 相比于以往的平面布阵或机械扫描方案,这是一种规模小、重量轻的低仰角覆盖方法,非常适用于L频段机载前舱卫通天线。 Compared with the previous planar array or mechanical schemes, the proposed method is a low-elevation coverage method with small scale and light weight,which is very suitable for the L-band airborne forward hatch antenna for satellite communications.
14450 针对现有的无人机航迹规划方法收敛速度较慢、效率不高、易陷入局部最优等问题,构建了基于改进细菌觅食优化算法的无人机航迹规划结构,从三个方面改进算法： For the problems such as slow convergence speed,low efficiency and easy to fall into local optimum in the existing unmanned aerial vehicle( UAV) track planning methods,the UAV trajectory planning structure is built based on the improved Bacterial Foraging Optimization( BFO) algorithm. The algorithm is improved from three aspects:
14451 一是将固定步长改为自适应步长;二是游动时嵌入粒子群算法学习因子思想;三是将固定迁徙概率改为自适应迁徙概率。 first,changing the fixed step size to adaptive step size second, embedding the learning factor idea of particle swarm algorithm when swimming; third,changing the fixed migration probability to the adaptive migration probability.
14452 同时,提出了飞行代价目标函数,通过函数寻优进行无人机航迹规划,并由数字高程数据建立三维环境,对比基本细菌觅食优化算法和粒子群算法进行仿真。 In addition,the UAV track planning is performed through function optimization when the flight cost objective function is designed,and the three-dimensional environment is established from the digital elevation data.
14453 结果表明,基于改进细菌觅食优化算法优化的无人机航迹规划结构具有路径长度更短、路径更平滑和收敛速度更快的特点。 Compared with the basic BFO algorithm and the particle swarm algorithm for simulation,the results show that the UAV track planning optimized structure based on the improved BFO algorithm has the characteristics of shorter path length,smoother path and faster conver- gence speed.
14454 通过对无人机互通互联互操作等通用化测控系统的研究,提出了基于VPX架构的无人机测控终端综合化开放平台技术,通过采用标准化、通用化硬件模块,软件设计统一规范和标准,嵌入第三方软件,实现任务功能协同开发。 Through the research of unmanned aerial vehicle( UAV) interoperability and other universal telemetry , tracking and control( TT&C) system,an integrated open platform technology for UAV TT&C terminal based on VPX architecture is proposed. By adopting standardized and universal hardware modules,unified software design standards and embedded third-party software,the task function collaborative development is realized.