基于合作信标的卫星激光通信瞄准捕获仿真系统

Simulation System of the Beacon Pointing and Acquisition Process in the Satellite Laser Communication

针对星间激光通信基于合作激光信标的瞄准与捕获过程,在LabVIEW(虚拟仪器)平台上研制了一套瞄准与捕获仿真系统。该系统模拟卫星轨道姿态动力学,建立双星指向关系,仿真双自由度转台初始对准。根据不确定区域大小,驱动信标激光进行螺旋扫描,根据信标光束散角及探测器视场,确定仿真捕获点以完成捕获。加入含有高斯噪声的最大速度为1°/s,最大加速度为1°/s2的等效正弦扰动进行了动态捕获实验。最终实现了同步轨道卫星和近地轨道卫星间动态双星激光通信瞄准与捕获仿真,形成了基于虚拟仪器的激光通信全过程仿真模式,为跟踪系统仿真及无信标捕获的仿真奠定了基础。

A set of simulation system is developed on LabVIEW platform for the beacon pointing and acquisition process of the satellite laser communication. This system simulates the satellite orbit and attitude dynamics, establishes the binary pointing relationship and simulates the initial alignment of the turntable with two degrees of freedom. The beacon laser is driven to do the helical scanning according to the size of the uncertain region. The beam angle and the field of the detector determine the simulation acquisition point so as to acquire it. And then equivalent sinusoidal disturbances with Gaussian noise 1°/s maximum speed and 1°/s2 maximum acceleration are used to finish the dynamical acquisition experiment. Finally, the pointing and acquisition simulation of the dynamic binary laser communication between a geostationary earth orbit （GEO） and a low earth orbit （LEO） is accomplished, and the simulation model of the laser communication process based on the virtual instrument is also constructed, which estabishes the foundation for the tracking system simulation and beaconless acquisition simulation.