项目名称: 带多充液箱及柔性附件航天器刚液柔控非线性耦合动力学研究
项目编号: No.11472041
项目类型: 面上项目
立项/批准年度: 2015
项目学科: 数理科学和化学
项目作者: 岳宝增
作者单位: 北京理工大学
项目金额: 86万元
中文摘要: 现代大型航天器要完成长时间及复杂的飞行任务需要携带多燃料贮箱及大型柔性附件。航天器在轨道及姿态机动和控制过程中会遇到刚体运动、液体晃动、柔性附件振动及控制系统之间的非线性耦合问题。本项目采用理论分析、数值仿真及物理实验相结合的综合协调方法对带多充液箱及柔性附件航天器耦合系统建立数学模型。应用现代非线性理论和方法对耦合动力学系统开展多层次、多尺度的定性与定量分析。对耦合大系统的稳定性及非线性控制器设计进行研究。探讨非线性现象发生的机理并给出稳定性判据及准则。针对航天器的姿态镇定、轨道及姿态机动、液体晃动及柔性附件振动等问题,设计自适应复合控制器,保证闭环信号有界并使航天器姿态渐近跟踪预期输出、同时抑制液体晃动及柔性附件的振动。在刚液柔控耦合系统的建模方法和理论、欠驱动系统非线性动力学与控制的方法和理论、多体耦合系统集成一体化仿真软件开发等方面取得创新成果并为复杂航天器总体设计提供参考依据。
中文关键词: 非线性动力学;稳定性;动力学建模;振动控制;非线性振动
英文摘要: Space missions increasing complexity require modern spacecraft to be equipped with multiple liquid filled containers and large flexible appendages to execute trajectory and attitude maneuvers during which the non-linearly coupled dynamics between rigid body dynamics, liquid sloshing, flexible vibration and control system will be encountered. The mathematical models for the spacecraft dynamics coupled with liquid slosh and flexible appendage vibration will be obtained by using the consistent synthesis methods. The modern nonlinear theories and methods will be employed to carry out the quantitative and qualitative research, and conduct the hierarchical and multiple scale analysis of the coupled dynamics for the spacecraft system composed of the rigid body, liquid fuel and flexible appendage and controller. The stability criteria and principles will be established by analyzing the mechanism of the nonlinear phenomena of the coupled dynamic system. This project is proposed to meet the impendent requirements from space engineering applications such as spacecraft attitude stabilization, orbit and attitude maneuvers, suppression of the liquid sloshing and flexible appendage vibration. The paramount tasks are to design the robust controller such that all closed-loop signals are bounded and the spacecraft attitude asymptotically tracks the desired output, and it is guaranteed that both the liquid sloshing and flexible appendage vibration are suppressed. The innovative methods and theories for the modeling of dynamically coupled rigid-flexible-liquid-control system and the control of the un-actuated nonlinear dynamic system, the computational results and integrated simulation software for the coupled multi-body system will provide the basis for the complex spacecraft system design.
英文关键词: Nonlinear dynamics;Stability;Dynamics modeling;Vibration and control;Nonlinear Vibration