对星地量子测距过程中利用捕获跟踪瞄准(Acquisition tracking and pointing,ATP)系统进行纠缠光子对收发和利用符合计数原理计算纠缠光子对到达时间差(Time difference of arrival,TDOA)的两个关键过程进行了仿真实验研究。根据"...对星地量子测距过程中利用捕获跟踪瞄准(Acquisition tracking and pointing,ATP)系统进行纠缠光子对收发和利用符合计数原理计算纠缠光子对到达时间差(Time difference of arrival,TDOA)的两个关键过程进行了仿真实验研究。根据"墨子号"量子卫星真实的6个轨道参数,对卫星的运动轨迹以及地面用户对从卫星上发射到地面信号的ATP过程进行系统仿真实验研究。分析并设计了ATP系统的结构;借助于Simulink环境下的仿真软件,建立ATP时域仿真系统,将所计算出的"墨子号"方位角与俯仰角位置信号作为ATP系统的输入信号,对所建立的ATP系统进行星地纠缠光收发的捕获跟踪瞄准过程进行了系统仿真实验,跟踪精度达到了2μrad;在实现地面用户对量子卫星的精确跟踪的基础上,设计并进行纠缠光子对收发及其符合计数的仿真实验;拟合出纠缠光子对皮秒级误差的到达时间差,实现了精确的量子测距过程,为量子导航系统的实现提供了一定的理论及仿真实验基础。展开更多
This paper demonstrates that the application of calibration algorithms of aerodynamic parameters for the trajectory of spinning projectile is successful. First, from the point of view of the trajectory simulation, a g...This paper demonstrates that the application of calibration algorithms of aerodynamic parameters for the trajectory of spinning projectile is successful. First, from the point of view of the trajectory simulation, a general summary of well-known trajectory models is given. A five degrees of freedom （5 DOF） model is developed that can match the projectile motion essentially in the vertex region, and the results obtained by 5 DOF model are in close agreement with those of a more sophisticated 6 DOF model for elevation angles above 45 degrees. Secondly, the calibration algorithms have been developed and are summarized. The methods of calibrating the flight trajectory models are compared, and these methods are shown to be effective in the representative cases. In addition, the method of Math number calibration （MNC） is presented; some possible areas in MNC for further investigation are indicated together with benefits to be gained. The utilization of MNC schemes not only allow a worthwhile reduction of calibration rounds firing in range and accuracy （R＆A） trial and production of firing tables （PFT） test, but also make PFT and fire control data （FCD） more cost effective.展开更多
文摘对星地量子测距过程中利用捕获跟踪瞄准(Acquisition tracking and pointing,ATP)系统进行纠缠光子对收发和利用符合计数原理计算纠缠光子对到达时间差(Time difference of arrival,TDOA)的两个关键过程进行了仿真实验研究。根据"墨子号"量子卫星真实的6个轨道参数,对卫星的运动轨迹以及地面用户对从卫星上发射到地面信号的ATP过程进行系统仿真实验研究。分析并设计了ATP系统的结构;借助于Simulink环境下的仿真软件,建立ATP时域仿真系统,将所计算出的"墨子号"方位角与俯仰角位置信号作为ATP系统的输入信号,对所建立的ATP系统进行星地纠缠光收发的捕获跟踪瞄准过程进行了系统仿真实验,跟踪精度达到了2μrad;在实现地面用户对量子卫星的精确跟踪的基础上,设计并进行纠缠光子对收发及其符合计数的仿真实验;拟合出纠缠光子对皮秒级误差的到达时间差,实现了精确的量子测距过程,为量子导航系统的实现提供了一定的理论及仿真实验基础。
文摘This paper demonstrates that the application of calibration algorithms of aerodynamic parameters for the trajectory of spinning projectile is successful. First, from the point of view of the trajectory simulation, a general summary of well-known trajectory models is given. A five degrees of freedom （5 DOF） model is developed that can match the projectile motion essentially in the vertex region, and the results obtained by 5 DOF model are in close agreement with those of a more sophisticated 6 DOF model for elevation angles above 45 degrees. Secondly, the calibration algorithms have been developed and are summarized. The methods of calibrating the flight trajectory models are compared, and these methods are shown to be effective in the representative cases. In addition, the method of Math number calibration （MNC） is presented; some possible areas in MNC for further investigation are indicated together with benefits to be gained. The utilization of MNC schemes not only allow a worthwhile reduction of calibration rounds firing in range and accuracy （R＆A） trial and production of firing tables （PFT） test, but also make PFT and fire control data （FCD） more cost effective.
