月面大范围空间机动初步优化  

Initial Optimization of Lunar Large-scale Space Maneuver

作　　者：任宽 申麟[1] 李扬[1] 吴胜宝[1] 胡冬生[1] Ren Kuan;Shen Lin;Li Yang;Wu Sheng-bao;Hu Dong-sheng(R&D Department,China Academy of Launch Vehicle Technology,100076,Beijing)

机构地区：[1]中国运载火箭技术研究院研究发展部,北京100076

出　　处：《导弹与航天运载技术（中英文）》2023年第1期52-58,共7页Missiles and Space Vehicles

摘　　要：月面大范围机动技术将是未来探索以及开发月球的关键技术之一,月面机动轨迹优化可以显著减少机动过程的燃料消耗。主要针对月面大范围机动轨迹进行初步优化,将整个机动轨迹分为上升段、自由漂浮段、第1次动力减速段、垂直动力着陆段,前面3个飞行阶段是对整个飞行任务的初制导,在达到飞行射程的同时使飞行终端满足垂直着陆段的降落要求,通过垂直着陆段修正初制导误差,使飞行器满足目标点精确着陆要求。首先,建立各个飞行阶段的运动学模型,将前3个飞行阶段作为一个轨迹优化问题,采用遗传优化算法对优化问题进行求解。另外,将垂直动力着陆段轨迹优化问题通过无损凸化和离散的方式转化为一个有限维的二阶锥凸问题,通过凸优化求解器求解以实现在线轨迹优化。仿真结果表明,采用的轨迹优化方法具有较高的任务适应性和鲁棒性,可以适应不同机动任务需求实现高精度垂直动力着陆。The large-scale lunar maneuvering technology will be one of the key technologies for future exploration and development of the moon.The optimization of lunar maneuvering trajectory can significantly reduce fuel consumption during the maneuvering process.The initial optimization of the lunar large-scale maneuvering trajectory is focused on,and the entire maneuvering trajectory is divided into ascending section,free-floating section,first dynamic deceleration section,vertical dynamic landing section.The first three flight sections are the initial guidance for the flight mission.While reaching the flight range,the flight terminal meets the landing requirements of the vertical power landing section,and the vertical power landing section is to correct the initial guidance error so that the aircraft can accurately land at the target point.Firstly,the kinetic model of each flight section,the first three flight sections is established are considered as a trajectory optimization problem,and genetic optimization algorithm is used to solve the optimization problem.In addition,the trajectory optimization problem of the vertical dynamic landing section is transformed into a finite-dimensional SOCP(second-order cone program)problem through lossless convexification,and solved by the convex optimization problem solver to achieve online trajectory optimization.The simulation results show that the trajectory optimization method adopted has high task adaptability and robustness,and can achieve high-precision vertical power landing adapting to different maneuver task requirements.

关 键 词：月面大范围机动技术 机动轨迹优化 垂直动力着陆 凸优化 

分 类 号：V476.3[航空宇航科学与技术—飞行器设计]