| 引用本文: | 何振,吴建军.基于激光推进的光船发射任务设计与参数优化分析.[J].国防科技大学学报,2007,29(3):11-15.[点击复制] |
| HE Zhen,WU Jianjun.An Investigation of Lightcraft Launching Task Design and Optimum Parameter Analysis Based on Laser Propulsion[J].Journal of National University of Defense Technology,2007,29(3):11-15[点击复制] |
|
| |
|
|
| 本文已被：浏览 6900次 下载 5479次 |
| 基于激光推进的光船发射任务设计与参数优化分析 |
| 何振, 吴建军 |
|
(国防科技大学 航天与材料工程学院，湖南 长沙 410073)
|
| 摘要: |
| 针对发射初始质量为100kg的光船到近地圆轨道的任务，研究了激光平均功率、激光大气传输特性、光船激光接收面面积、发动机比冲、发动机能量转化效率等参数之间的相互关系及光船飞行任务的优化问题。针对激光发射光船的具体要求，由功率估算公式计算出激光平均功率，从激光作用范围估算出光船的激光接收面的最小面积；基于光船飞行动力学模型，结合估算的参数，应用序列二次规划方法优化计算出光船飞行的最优弹道。计算结果表明，光船入轨质量可达到35.5kg，最优比冲为8140m/s。 |
| 关键词: 激光推进 光船 最优弹道 优化设计 |
| DOI： |
| 投稿日期：2006-12-09 |
| 基金项目:国家部委基金资助项目 |
|
| An Investigation of Lightcraft Launching Task Design and Optimum Parameter Analysis Based on Laser Propulsion |
| HE Zhen, WU Jianjun |
|
(College of Aerospace and Materials Engineering, National Univ. of Defense Technology, Changsha 410073, China)
|
| Abstract: |
| In order to launch objects into low-earth circular orbit using an earth-based laser and a lightcraft with 100kg initial mass, the relationships among the concerned parameters such as the laser average power, the characteristics of laser propagation in atmosphere, light receiver size of lightcraft，the specific impulse of engine, and the energy conversion efficiency of engine were investigated. Meanwhile, the optimal trajectory for such a task was also studied. The necessary average laser power was estimated from the initial acceleration of the lightcraft. The minimum size of the lightcraft's light receiver was derived from laser range. Based on the flight dynamic model of lightcraft and the estimated parameters, the optimum trajectory from the ground to low-earth orbit was computed. The results show that the maximum mass-to-orbit is up to 35.5kg, and the optimum specific impulse is 8140m/s. |
| Keywords: laser propulsion lightcraft optimum trajectory optimal design |
|
|
|
|
|
