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On the finite horizon Nash equilibrium solution in the differential game approach to formation control 被引量:3
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作者 JOND Hossein Barghi NABIYEV Vasif 《Journal of Systems Engineering and Electronics》 SCIE EI CSCD 2019年第6期1233-1242,共10页
The solvability of the coupled Riccati differential equations appearing in the differential game approach to the formation control problem is vital to the finite horizon Nash equilibrium solution.These equations(if so... The solvability of the coupled Riccati differential equations appearing in the differential game approach to the formation control problem is vital to the finite horizon Nash equilibrium solution.These equations(if solvable)can be solved numerically by using the terminal value and the backward iteration.To investigate the solvability and solution of these equations the formation control problem as the differential game is replaced by a discrete-time dynamic game.The main contributions of this paper are as follows.First,the existence of Nash equilibrium controls for the discretetime formation control problem is shown.Second,a backward iteration approximate solution to the coupled Riccati differential equations in the continuous-time differential game is developed.An illustrative example is given to justify the models and solution. 展开更多
关键词 formation control differential game dynamic game Nash equilibrium coupled riccati equations.
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面向海洋勘测的多水下机器人编队跟踪控制研究 被引量:1
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作者 闫勋 廖宇辰 +2 位作者 贾晋军 姜大鹏 颜家杰 《舰船科学技术》 北大核心 2024年第1期102-108,共7页
本文研究面向海洋勘测任务的多水下机器人系统编队跟踪控制分析和设计问题。首先,以有向图为工具,建立水下机器人之间的信息交互模型,并利用局部相邻个体的信息构建了基于一致性的协议。然后,提出多水下机器人系统实现编队跟踪控制的充... 本文研究面向海洋勘测任务的多水下机器人系统编队跟踪控制分析和设计问题。首先,以有向图为工具,建立水下机器人之间的信息交互模型,并利用局部相邻个体的信息构建了基于一致性的协议。然后,提出多水下机器人系统实现编队跟踪控制的充分条件。通过分析证明,若期望的编队满足给定条件,则多水下机器人系统可实现预定义的编队队形。此外,通过将编队控制协议增益矩阵计算转化为代数黎卡提方程求解问题,给出了一种确定编队控制协议矩阵的新方法。最后,通过数值模拟验证了所提方法的有效性。 展开更多
关键词 编队跟踪控制 一致性算法 黎卡提方程 多水下机器人
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离散时间代数Riccati方程解矩阵的界 被引量:2
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作者 毕海云 陈东彦 《电机与控制学报》 EI CSCD 北大核心 2010年第2期103-106,共4页
研究了一般离散时间代数Riccati方程(GDTARE)的解矩阵的估计问题。利用矩阵特征值的性质等推导出GDTARE的解矩阵的上下界,并建立了求解上下界的迭代格式,使用迭代格式可对上下界进行改进。最后,通过比较分析和算例验证说明了本文所得结... 研究了一般离散时间代数Riccati方程(GDTARE)的解矩阵的估计问题。利用矩阵特征值的性质等推导出GDTARE的解矩阵的上下界,并建立了求解上下界的迭代格式,使用迭代格式可对上下界进行改进。最后,通过比较分析和算例验证说明了本文所得结果较已有研究结果更具有一般性和较小的保守性。 展开更多
关键词 离散时间代数riccati方程 解矩阵 解矩阵的界 迭代格式
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代数黎卡提方程的求解与辛子空间迭代法 被引量:2
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作者 钟万勰 《上海力学》 CSCD 1994年第2期1-11,共11页
综合共轭辛子空间迭代法以及2^N消元迭代算法,利用接触变换下黎卡提方程解的变换公式,给出了代数黎卡提方程的有效解法。即使有│μ│=1的本征根,解法依然有效。数例表明了方法的有效性。
关键词 代数 黎卡提方程 辛子空间迭代
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Optimization of formation for multi-agent systems based on LQR 被引量:4
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作者 Chang-bin YU Yin-qiu WANG Jin-liang SHAO 《Frontiers of Information Technology & Electronic Engineering》 SCIE EI CSCD 2016年第2期96-109,共14页
In this paper,three optimal linear formation control algorithms are proposed for first-order linear multiagent systems from a linear quadratic regulator(LQR) perspective with cost functions consisting of both interact... In this paper,three optimal linear formation control algorithms are proposed for first-order linear multiagent systems from a linear quadratic regulator(LQR) perspective with cost functions consisting of both interaction energy cost and individual energy cost,because both the collective ob ject(such as formation or consensus) and the individual goal of each agent are very important for the overall system.First,we propose the optimal formation algorithm for first-order multi-agent systems without initial physical couplings.The optimal control parameter matrix of the algorithm is the solution to an algebraic Riccati equation(ARE).It is shown that the matrix is the sum of a Laplacian matrix and a positive definite diagonal matrix.Next,for physically interconnected multi-agent systems,the optimal formation algorithm is presented,and the corresponding parameter matrix is given from the solution to a group of quadratic equations with one unknown.Finally,if the communication topology between agents is fixed,the local feedback gain is obtained from the solution to a quadratic equation with one unknown.The equation is derived from the derivative of the cost function with respect to the local feedback gain.Numerical examples are provided to validate the effectiveness of the proposed approaches and to illustrate the geometrical performances of multi-agent systems. 展开更多
关键词 Linear quadratic regulator (LQR) formation control Algebraic riccati equation (ARE) OPTIMALCONTROL Multi-agent systems
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三阶中立型微分方程的渐近性质(英文)
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作者 范淑慧 孔彦 白玉真 《曲阜师范大学学报(自然科学版)》 CAS 2017年第1期1-9,共9页
该文的主要目的是讨论具有偏差变元的三阶中立型微分方程的渐近性和振动性.将利用广义Riccati变换和积分平均值的技巧,给出一些新的可以应用到文献中的结果.
关键词 振动性 渐进性 三阶微分方程 广义riccati变换 偏差变元
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Synthesis and anti-HIV activities of phorbol derivatives
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作者 HUANG Xiaolei TANG Chengrun +9 位作者 HUANG Xusheng YANG Yun LI Qirun MA Mengdi ZHAO Lei YANG Liumeng CUI Yadong ZHANG Zhenqing ZHENG Yongtang ZHANG Jian 《Chinese Journal of Natural Medicines》 SCIE CAS CSCD 2024年第2期146-160,共15页
In this study,37 derivatives of phorbol esters were synthesized and their anti-HIV-1 activities evaluated,building upon our previous synthesis of 51 phorbol derivatives.12-Para-electron-acceptor-trans-cinnamoyl-13-dec... In this study,37 derivatives of phorbol esters were synthesized and their anti-HIV-1 activities evaluated,building upon our previous synthesis of 51 phorbol derivatives.12-Para-electron-acceptor-trans-cinnamoyl-13-decanoyl phorbol derivatives stood out,demonstrating remarkable anti-HIV-1 activities and inhibitory effects on syncytia formation.These derivatives exhibited a higher safety index compared with the positive control drug.Among them,12-(trans-4-fluorocinnamoyl)-13-decanoyl phorbol,designated as compound 3c,exhibited the most potent anti-HIV-1 activity(EC_(50)2.9 nmol·L^(−1),CC50/EC_(50)11117.24)and significantly inhibited the formation of syncytium(EC_(50)7.0 nmol·L^(−1),CC50/EC_(50)4891.43).Moreover,compound 3c is hypothesized to act both as an HIV-1 entry inhibitor and as an HIV-1 reverse transcriptase inhibitor.Isothermal titration calorimetry and molecular docking studies indicated that compound 3c may also function as a natural activator of protein kinase C(PKC).Therefore,compound 3c emerges as a potential candidate for developing new anti-HIV drugs. 展开更多
关键词 Phorbol esters Anti-HIV-1 activity Syncytia formation 12-(trans-4-fluorocinnamoyl)-13-decanoyl phorbol Safety index HIV-1 entry inhibitor HIV-1 reverse transcriptase inhibitor PKC activator
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OSCILLATION THEOREMS FOR A CLASS OF TWO-DIMENSIONAL DELAY DIFFERENTIAL SYSTEMS 被引量:2
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作者 Jinchang Yu 《Annals of Differential Equations》 2013年第1期107-113,共7页
By Riccati transformation, we establish some oscillation theorems for a class of two-dimensional nonlinear delay differential systems. The results obtained generalize some relatively known results.
关键词 OSCILLATION delay differential system TWO-DIMENSIONAL riccati trans- formation second order
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The compositions,sources,and size distribution of the dust storm from China in spring of 2000 and its impact on the global environment 被引量:44
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作者 Guoshun Zhuang Jinghua Guo +1 位作者 Hui Yuan Chengyi Zhao 《Chinese Science Bulletin》 SCIE EI CAS 2001年第11期895-901,共7页
The average mass concentration of the aerosols in Beijing during the dust storm in the spring of 2000 was -6000 μg · m-3, -30 times as high as that in the non-dust storm days. The enrichment factors of the pollu... The average mass concentration of the aerosols in Beijing during the dust storm in the spring of 2000 was -6000 μg · m-3, -30 times as high as that in the non-dust storm days. The enrichment factors of the pollution elements As, Sb and Se were higher than those in the non-dust storm days. This indicated that As, Sb and Se resulted from the pollution sources of those areas, through which the dust storm passed during their long-range transport, in addition to the local pollution sources in Beijing. The enrichment factors of the Pb, Zn, Cd and Cu were much less than those in the non-dust storm days, suggesting that the local pollution sources in Beijing area contributed to them mostly. The enrichment factors of elements Al, Fe, Sc, Mn, Na, Ni, Cr, V and Co were close to 1, showing that these elements originated from crust. The concentration of S in the dust storm was -10 μg · m-3,4 times as high as that in non-dust storm. S in the aerosols resulted from the adsorption of gaseous SO2 and the consequent 展开更多
关键词 DUST STORM AEROSOLS particles POLLUTION SOURCES trans- formation global change.
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