基于事件触发的预设时间航天器轨迹跟踪控制  

Event trigger-based prescribed-time tracking control of spacecraft

作　　者：郝勇[1] 贾登辉 李晨洋 李俊[1,2] HAO Yong;JIA Denghui;LI Chenyang;LI Jun(College of Intelligent Systems Science and Engineering,Harbin Engineering University,Harbin 150001,China;School of Astronautics,Harbin Institute of Technology,Harbin 150001,China)

机构地区：[1]哈尔滨工程大学智能科学与工程学院,黑龙江哈尔滨150001 [2]哈尔滨工业大学航天学院,黑龙江哈尔滨150001

出　　处：《智能系统学报》2024年第3期661-669,共9页CAAI Transactions on Intelligent Systems

摘　　要：针对通信受限条件下的航天器轨迹跟踪问题,提出了一种基于事件触发的预设时间控制算法。为了满足不同任务场景下对航天器快速性的要求,本文设计了一种预设时间轨迹跟踪控制算法。结合反步控制理论及预设时间动态增益,最终实现轨迹跟踪系统的预设时间收敛。作为一种典型的网络化控制系统,航天器在执行任务过程中可能会受到自身通信能力的限制,造成通信阻塞、时延和丢包等问题。为此,本文提出了一种基于动态参数的事件触发算法,在保证系统控制精度的同时,一定程度上避免了控制中心与航天器本体间不必要的通信资源消耗。相比于传统的静态事件触发算法,文中基于动态参数的事件触发算法在减少通信频率方面更具优势。通过理论分析和仿真实验验证所提控制算法的有效性。An event trigger-based prescribed-time control algorithm is proposed for trajectory tracking of a spacecraft under communication constraints.First,to endow the spacecraft with rapidity under different task scenarios,a prescribed-time trajectory-tracking control algorithm is designed,which finally achieves the prescribed-time convergence of the trajectory-tracking control system by combining the backstepping control theory and dynamic gain of the prescribed time.Second,as a typical networked control system,the spacecraft may be limited by its own communication capability in the process of task implementation,which will lead to communication congestion,time delay,packet loss,and so on.Therefore,an event-trigger algorithm is proposed based on the dynamic parameter.While assuring system control precision,the algorithm can avoid unnecessary communication consumption between the control center and the spacecraft itself to a certain extent.Compared with the traditional static event-trigger algorithm,the proposed dynamic parameter-based event-trigger algorithm has the advantage of reducing the communication frequency.Finally,the effectiveness of the proposed control algorithm is verified by theoretical analysis and simulation experiments.

关 键 词：通信受限 轨迹跟踪 事件触发 预设时间 反步控制 动态增益 网络化控制系统 动态参数 

分 类 号：TP29[自动化与计算机技术—检测技术与自动化装置] O231[自动化与计算机技术—控制科学与工程]