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国家自然科学基金(61104026)

作品数:10 被引量:28H指数:3
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相关机构:哈尔滨工业大学中国科学院长春光学精密机械与物理研究所深圳航天东方红海特卫星有限公司更多>>
发文基金:国家自然科学基金国家高技术研究发展计划更多>>
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10 条 记 录,以下是 1-10
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利用零运动避免SGCMG框架轴转速死区的方法被引量:3
2014年
研究了应用SGCMG零运动避免框架轴转速死区的方法。利用奇异值分解的方法对SGCMG的零运动进行分析,提取正交的零空间基底与各个基底对应的坐标值。以SGCMG零运动尽量远离零为原则选取性能指标,令性能指标取极小,求解出零空间基底坐标方向的单位列阵。以每一个SGCMG的框架轴转速均大于死区转速为准则,给出了选取零空间基底坐标列阵模长的方法。设计SGCMG零空间基底坐标的调节策略,能使得SGCMG长时间运行在框架轴转速死区外。最后给出含有卫星姿态控制系统的仿真实例,校验了所设计零运动的有效性。
耿云海侯志立
关键词:SGCMG死区
对接端口间相对运动耦合动力学建模被引量:3
2014年
为提高对非合作目标在轨服务任务的成功率,本文建立了两航天器交会过程的非质心点间耦合相对运动动力学模型。从传统点质量相对运动模型入手,考虑两航天器相对姿态运动和服务航天器绝对姿态运动产生的耦合作用,建立对接端口间的耦合动力学模型。分析耦合作用的种类:航天器所受外力矩产生的动力学耦合;相对姿态四元数、相对姿态角速度和服务航天器绝对姿态角速度产生的运动学耦合。最后设计了滑模控制器,实现对接端口间无碰撞安全对接。数学仿真证明,该耦合作用在交会接近过程中具有显著影响,因此不可被忽略。
陈炳龙耿云海
关键词:非合作目标
LMI Approach to Mixed H_/H_∞ Fault Detection Observer Design被引量:1
2012年
To investigate the robust fault detection (RFD) observer design for linear uncertain systems, the H_index and H∞ norm are used to describe this observer design as optimization problems. Conditions for the existence of such a fault detection observer are given in terms of matrix inequalities. The solution is obtained by new iterative linear matrix inequality (ILMI) algorithms. The RFD observer design over finite frequency range in which Of does not have full column rank for a system is also considered. Numerical example demonstrates that the designed fault detection observer has high sensitivity to the fault and strong robustness to the unknown input.
张迎春吴丽娜李璟璟陈雪芹
关键词:OBSERVERROBUSTNESS
基于偏差分离原理的卫星执行机构故障诊断被引量:5
2015年
提出一种同时估计输入时滞和控制输入故障的方法。首先,基于偏差分离的思想,分别建立含有输入时滞和控制输入故障的一般控制系统与卫星姿态控制系统的数学模型。其次,基于二阶Kalman滤波对控制输入故障以及输入时滞进行估计。最后,对所提出的方法进行了数学仿真验证,特别地,基于"快舟一号"卫星控制系统半物理仿真平台进行了半物理仿真验证,证明了方法的可行性和有效性。
李冬柏陈雪芹李诚良
关键词:故障诊断时滞卫星
Modified super twisting controller for servicing to uncontrolled spacecraft
2015年
A relative position and attitude coupled sliding mode controller is proposed by combining the standard super twisting (ST) control and basic linear algorithm for autonomous rendezvous and docking. It is schemed for on-orbit servicing to a tumbling non- cooperative target spacecraft subjected to external disturbances. A coupled dynamic model is established including both kinemati- cal and dynamic coupled effect of relative rotation on relative translation, which illustrates the relative movement between the docking port located in target spacecraft and another in service spacecraft. The modified super twisting (MST) control algorithm containing linear compensation items is schemed to manipulate the relative position and attitude synchronously. The correction provides more robustness and convergence velocity for dealing with linearly growing perturbations than the ST control algorithm. Moreover, the stability characteristic of closed-loop system is ana- lyzed by Lyapunov method. Numerical simulations are adopted to verify the analysis with the comparison between MST and ST control algorithms. Simulation results demonstrate that the pro- posed MST controller is characterized by high precision, strong robustness and fast convergence velocity to attenuate the linearly increasing perturbations.
Binglong ChenYunhai Geng
Super twisting controller for on-orbit servicing to non-cooperative target被引量:9
2015年
A relative position and attitude coupled controller is proposed for rendezvous and docking between two docking ports located in different spacecraft. It is concerned with servicing to a tumbling non-cooperative target spacecraft in arbitrary orbit subjected to external disturbances.By considering both kinematic and dynamical coupled effects of relative rotation on relative translation, a coupled dynamic model is established to represent the relative motion of docking port on target spacecraft with respect to another on the service spacecraft. The spacecraft control is based on the second order sliding mode algorithm of super twisting(ST). It is schemed to manipulate the relative position and attitude synchronously. A formal proof of the finite time convergence property of the closed-loop system is derived theoretically by the second method of Lyapunov. Numerical simulations with the designed ST controller are presented to validate the analytic analysis by contrast with the twisting control algorithm. Simulation results demonstrate that the proposed relative position and attitude integrated controller is characterized by high precision, strong robustness and high reliability.
Chen BinglongGeng Yunhai
基于在线补偿算法的卫星姿态控制系统容错控制被引量:1
2012年
针对卫星姿态控制系统中传感器或执行机构发生故障的情况,提出一种基于在线核学习算法补偿的内模容错控制方法.该方法利用内模控制的性质以及在线学习算法的补偿能力,来实现卫星姿态控制系统的自适应容错控制.首先,提出了一种基于正交匹配追踪思想的在线核学习算法,其正交性增强了算法的稀疏性,匹配追踪思想确保了估计误差的有界性.其次,利用提出的在线学习算法来补偿原系统的逆模型,作为故障后系统的逆模型使用,并与原系统组成伪线性系统.最后,将此系统应用于卫星姿态控制系统的内模控制中,仿真结果证明该算法快速可靠,能够满足故障状况下的性能要求.
管宇赵石磊张迎春贾庆贤
关键词:正交匹配追踪容错控制内模控制卫星姿态控制
Fault reconstruction observer design for continuous-time systems with measurement disturbances via descriptor system approach被引量:1
2014年
This paper addresses a problem of observer-based sensor fault reconstruction for continuous-time systems subject to sensor faults and measurement disturbances via a descriptor system approach. An augmented descriptor plant is first formulated, by assembling measurement disturbances and sensor faults into an auxiliary state vector. Then a novel descriptor state observer for the augmented plant is constructed such that simultaneous reconstruction of original system states, sensor faults and measurement disturbances are obtained readily. Sufficient conditions for the existence of the proposed observer are explicitly provided, and the application scope of the observer is further discussed. In addition, an extension of the proposed linear approach to a class of nonlinear systems with Lipschitz constraints is investigated. Finally, two numerical examples are simulated to illustrate the effectiveness of the proposed fault-reconstructing approaches.
Qingxian JiaYingchun ZhangChengliang LiXueqin Chen
基于LMI的H_/H_∞故障检测观测器设计被引量:2
2012年
考虑未知输入信号的影响,研究了线性系统鲁棒故障检测观测器的设计问题。利用描述残差对故障灵敏度的H_指数和表示残差对未知输入鲁棒性的H∞范数,将鲁棒故障检测观测器的设计问题描述为基于H_/H∞的优化设计问题。利用线性矩阵不等式(linear matrix inequality,LMI)理论,给出故障检测观测器的存在条件,提出一种新的迭代LMI算法求解最优观测器增益。仿真结果表明,利用这种方法设计的故障检测观测器对故障的灵敏度高,对未知输入的鲁棒性强。
吴丽娜张迎春贾庆贤陈雪芹
关键词:故障检测线性矩阵不等式观测器
对失控航天器在轨服务的自适应滑模控制器设计被引量:3
2015年
为实现对自由翻滚的失控目标航天器进行在轨服务,基于二阶滑模控制算法设计了相对位置与姿态耦合的自适应控制器。考虑相对转动对相对平动的耦合作用,建立了两航天器对接端口间相对位置与姿态耦合的动力学模型,并在此基础上设计了自适应Super twisting控制器,以减弱已知界限的有界干扰所产生的震颤效应,使闭环系统在有限时间内收敛到平衡点。利用李雅普诺夫方法证明了有界干扰下的闭环系统稳定性,并对收敛时间的上界进行了估计。仿真结果表明,与Super twisting算法相比,所设计的自适应二阶滑模控制器对参数不确定性及线性增长有界干扰具有较强的鲁棒性,且控制精度满足在轨服务的任务需求。
陈炳龙耿云海
关键词:滑模控制自适应控制有限时间收敛
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