考虑安装偏差的联合执行机构自适应控制算法
发布时间:2017-12-28 17:31
本文关键词:考虑安装偏差的联合执行机构自适应控制算法 出处:《哈尔滨工业大学学报》2016年11期 论文类型:期刊论文
更多相关文章: 控制力矩陀螺 飞轮 安装偏差 控制精度 自适应控制
【摘要】:为满足卫星机动过程中成像的需求,采用联合控制力矩陀螺和飞轮作为执行机构提供大且精确的控制力矩,但其安装的偏差会降低卫星姿态控制精度,基于设计自适应控制律处理这一问题.在携带变速控制力矩陀螺卫星通用模型的基础上,建立考虑安装偏差的联合执行机构控制模型.基于修正罗德里格参数描述的姿态运动学,设计多输入多输出自适应跟踪控制律估计执行机构的安装偏差与卫星转动惯量,并进行控制补偿以提高姿态控制精度.采用平滑映射避免控制律出现奇异现象而导致的无法执行,并基于Lyapunov原理分析了控制系统稳定性.数学对比仿真结果表明,该控制方法能够有效的实现卫星快速机动过程中的高精度控制,可提高2个数量级的跟踪控制精度.
[Abstract]:In order to meet the requirements in the process of mobile satellite imaging, using a combination of control moment gyro and flywheel as actuator to provide control torque and accurate, but the installation deviation will reduce the accuracy of satellite attitude control, control law to deal with this issue. Based on the design of adaptive transmission control in articles based on the general model of moment gyroscope satellite. Considering the joint actuator installation deviation control model. The modified Rodrigo attitude kinematics based on Parameterized Design of multi input multi output adaptive tracking control law enforcement agencies estimate installation deviation and satellite inertia, control and compensation to improve the accuracy of attitude control. By mapping avoid singularity phenomenon and control law can not lead to based on the principle of Lyapunov implementation, and analyzes the stability of the control system. The mathematical simulation results show that this method can control. The high precision control in the process of satellite fast maneuver can be achieved effectively, which can improve the tracking control precision of 2 orders of magnitude.
【作者单位】: 哈尔滨工业大学卫星技术研究所;北京空间飞行器总体设计部;
【分类号】:V448.2
【正文快照】: 现代航天器的功能需求对卫星的大角度快速机动能力提出更高的要求,以提高卫星获取信息的能力,这个能力不仅体现在获取信息的快速性上[1],还体现在信息获取的多样性上(如立体成像,拼接成像等)[2-3].在一些非沿迹成像[4]、地面动目标跟踪这些工作模式在卫星快速机动的基础上,还,
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