摘要
撞击器在接近目标小天体过程中相对速度较快,这要求撞击器的导航、制导与控制(GNC)系统要具有较高的自主性和实时性。对撞击器GNC系统进行了研究,采用深空环境中常用的传感器及执行机构,对撞击器自主GNC系统进行了构建,并分别设计了自主光学导航算法与轨道修正制导律。最后为了验证所设计GNC系统的可行性和可靠性,进行了严格的六自由度蒙特卡罗数学仿真,同时对机动时刻、撞击目标点等关键参数对最终撞击性能的影响进行了分析。
Due to the quite high relatively speed when impactors approach the small body, the guidance navigation and control （GNC） system should be highly autonomous and real time capability to achieving precise impact on small bodies. Based on the common sensors and actuators in deep space mission, a GNC system was composed. Meanwhile, an autonomous optical navigation scheme and a trajectory correction maneuver guide law were proposed. Finally, strict six-freedom Monte Carlo simulations were carried out to validate feasibility and reliability of the GNC system, and the key parameters such as maneuver timing and impact aim point on impact performance were analyzed.
出处
《系统仿真学报》
CAS
CSCD
北大核心
2011年第1期89-94,共6页
Journal of System Simulation
基金
国家自然科学基金(60874094)
关键词
导航
制导与控制
小天体撞击器
自主光学导航
轨道修正制导律
蒙特卡罗仿真
navigation guidance and control
small body impactors
autonomous optical navigation
trajectory correction maneuver guide law
Monte-Carlo simulation
