准确模拟空天飞行器的飞行航迹,是验证空天飞行器导航算法正确性、研究导航系统性能的重要前提和基础。为对空天飞行器的全程飞行航迹进行模拟仿真,提出了利用动力学软件设计出高可信度、高精度动态飞行航迹的方法。针对空天飞行器发射段、在轨段、灵活变轨段、高速再入段4个不同飞行阶段,分别使用了STK软件中的运载火箭、卫星以及飞机模型,并结合空天飞行器不同阶段的运动特性设置了模型的相关参数,实现了空天飞行器的全程分段航迹模拟。利用获得的STK数据报告对空天飞行器进行了惯性导航系统仿真,仿真验证结果表明,STK设计的航迹能有效满足导航系统的仿真要求。
Accurate simulation of aerospace vehicle's trajectory is the important premise and foundation to verify the correctnessof aerospace vehicle' s navigation algorithm and the performance of navigation sys- tem. To conduct the simulation research of aerospace vehicle's trajectory, a method of using STK software to design a trajectoryof high credibility and high precisionis put forward. Aiming at launchperiod, on- or- bitperiod,maneuver period and high- speed reentry period of aerospace vehicle, respectively using the rocket,satellite and aircraft modelsin the STK software,and combined with the aerospace vehicle's move- ment characteristics of different periods, the related parameters of the modelsare set. Finally, aerospace ve- hicle's trajectory simulation is realized. The inertial navigation system simulation ofaerospace vehicle is carried outwith STK's data report,which verifies that STK-basedtrajectorycan satisfy the requirement of the navigation simulation system.