摘要：A nonlinear sliding mode adaptive controller for a thin-film diffractive imaging system is designed to achieve accurate pointing direction over the attitude of subarrays in large-diameter mirror *** kinematics and dynamics equations based on error quaternion and angular velocity are derived,and a diffractive thin-film sub-mirror array controller is designed to point ***,the global stability of the controller is proved by the Lyapunov *** the controller can adaptively identify the inertia matrix of each sub-mirror system,it is robust to bounded disturbances and changes in inertia *** the same time,the continuous arctangent function is introduced,which is effectively *** simulation results show that the designed controller can ensure the accurate tracking of the diffractive film in each sub-mirror in the presence of rotational inertia matrix uncertainty and various disturbances.

摘要：针对在轨卫星数量不断扩大,空间任务也日趋复杂化,仅依靠地基固定站测控难以满足实际需求的问题,本文研究了基于移动站的协同测控任务规划问题。基于卫星在轨运动的规范化描述,建立了多星多平台测控资源的调度模型,并将复杂空间任务规划问题转化为时间窗口编排问题。基于这一模型提出了一种遗传算法求解策略,该算法设计了一种新型的编码技术,并通过全局型搜索寻求高效、快速、可靠的近似最优解。利用仿真算例验证了该算法的有效性和快速性。

摘要：为了合理、高效地利用逐渐增多的在轨卫星资源,更好地完成对地观测任务,提出了一种基于遗传禁忌算法的多星协同任务规划方法,解决了多星协同任务规划问题。建立多星协同任务规划问题模型,并设计综合考虑任务总收益值和总完成度、卫星资源总侧摆角的目标函数。兼顾遗传算法较强的全局寻优能力和禁忌搜索算法较强的局部寻优能力,设计包含遗传搜索和禁忌搜索2个阶段的多星协同任务规划算法。建立不同种群数量、不同任务规模的仿真场景,验证了所提出方法的稳定性和有效性。