摘要
可靠和有效的高精度姿态控制需要已知卫星变化的质量特性的精确信息,在线辨识航天器的转动惯量显得尤为重要。利用飞轮作为执行机构,分别提出了一种基于递推最小二乘法的航天器转动惯量在线开环辨识和闭环辨识的算法。当飞轮输出合适的控制力矩时,能够快速辨识出处于开环状态的航天器转动惯量,并且保证航天器的姿态变化在可接受的范围内。提出了一种闭环辨识方法,基于变结构控制器,在航天器完成姿态机动任务的同时,能够快速辨识出航天器的转动惯量,辨识精度在2%之内。
In order to fulfill the reliable and efficient high precision attitude control,it is necessary to know the change of the mass property accurately,which makes the online identification of the moment of inertia become very important.With flying wheel as the execution unit,an open-loop and closed-loop moment of inertia identification method based on least recursive squares,an algorithm was proposed respectively.When the output control torque of the flying wheel is suitable,the open-loop spacecraft moment of inertia can be identified quickly,while the change of the spacecraft attitude is accepted.A closed-loop identification method was discussed based on variable structure controller.The spacecraft moment of inertia can be obtained rapidly while it completes the attitude motivation task,and the precision of the closed-loop identification can be within 2%.
出处
《系统仿真学报》
CAS
CSCD
北大核心
2010年第5期1117-1120,共4页
Journal of System Simulation
关键词
航天器
转动惯量
在线估计
闭环辨识
变结构控制器
spacecraft
moment of inertia
online estimation
closed-loop identification
variable structure controller
