| 气动-引力辅助轨道机动轨迹优化方法 |
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| 引用本文： | 张万里,王常虹,夏红伟,解伟男.气动-引力辅助轨道机动轨迹优化方法[J].西南交通大学学报,2011,46(1):167-174. |
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| 作者姓名： | 张万里 王常虹 夏红伟 解伟男 |
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| 作者单位： | 哈尔滨工业大学空间控制与惯性技术研究中心,黑龙江哈尔滨,150001 |
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| 基金项目： | 本文工作得到哈尔滨工业大学优秀青年教师培养计划的资助 |
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| 摘 要： | 为使航天器在星际航行中实现轨道机动且有效节省燃料,建立了AGA(aero-gravity assist)机动的动力学方程和性能指标函数,给出终端约束和路径约束条件,用拟谱法将连续两点边值问题转换为等价的非线性规划问题,应用SNOPT软件求出飞行器最大化日心速度和最小化日心速度对应的最优轨迹,最后对轨迹优化算法进行了仿真,得出在热流速率峰值约束下的最优轨迹变化规律.结果表明,节点数为40时,最大速度偏差为0.009 m/s,满足收敛精度要求;与引力辅助轨道机动相比,极大化日心速度增大了8.02%,极小化日心速度减小了32.26%,相应偏转角分别增加了42.74°和68.40°;与无热流速率约束情况相比,最大热流速率峰值为500 W/(cm2.s)时,飞行器进入大气的深度、日心速度和偏转角分别减少6.35 km、93 m/s和6°.
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| 关 键 词： | 气动-引力辅助 拟谱法 轨迹优化 日心速度 非线性规划 |
Trajectory Optimization Method of Aero-Gravity Assist Orbital Maneuver |
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| ZHANG Wanli,WANG Changhong,XIA Hongwei,XIE Weinan.Trajectory Optimization Method of Aero-Gravity Assist Orbital Maneuver[J].Journal of Southwest Jiaotong University,2011,46(1):167-174. |
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| Authors: | ZHANG Wanli WANG Changhong XIA Hongwei XIE Weinan |
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| Institution: | ZHANG Wanli,WANG Changhong,XIA Hongwei,XIE Weinan(Space Control and Inertial Technology Research Center,Harbin Institute of Technology,Harbin 150001,China) |
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| Abstract: | In order to achieve the orbit maneuver and save the fuel consumption in the space travel mission of spacecrafts,the dynamic equations and performance index functions of aero-gravity assist(AGA) maneuver were established under the terminal constraints and path constraints.The continuous two-point boundary value problem was converted to the equivalent nonlinear programming problem using the pseudospectral method,and the optimal trajectories corresponding to the maximum and minimum heliocentric velocities of t... |
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| Keywords: | aero-gravity assist pseudospectral methods trajectory optimization heliocentric velocity nonlinear programming |
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