非线性不确定系统的鲁棒镇定与非线性H~∞控制

研究一类非线性不确定系统的局部鲁棒镇定，提出了不确定系统的Ｌｙａｐｕｎｏｖ型可镇定的鲁棒性概念．在不确定项满足模有界结构条件下，对控制矩阵的不确定性分２种情况，分别从Ｈ∞控制和微分几何角度，给出了非线性Ｈ∞控制与非线性系统Ｌｙａｐｕｎｏｖ型可镇定的充分条件．     

耦合映象格子系统中的刚性同步

提出了一个新的反馈项，实现了两个耦合映象格子系统的时空混沌同步。讨论了这同步的特点，指出这种同步是刚性同步，并给出模拟结果。     

投影三维重建中基础矩阵的鲁棒性估计方法

在未定标系统中 ,基础矩阵给出了图像间对极几何关系的代数描述 ,解决了许多视觉问题的关键环节 ,本文提出了一种新的鲁棒性基础矩阵估计方法 ,它引入了能够较好表达代数余数标准方差的Sampson加权算子 ,并且用迭代法来满足图像点噪声为非高斯白噪声的情况 .实验结果表明 ,在较大噪声干扰的条件 ,仍能较为准确地估计基础矩阵 ,具有良好的鲁棒性和较快的运算速度 .     

Perturbation and robust controllability of singular distributed parameter control systems in Hilbert space

Perturbation and robust controllability of the singular distributed parameter control system are discussed via functional analysis and the theory of GE-semigroup in Hilbert space.The perturbation principle of GE-semigroup and the sufficient condition concerning the robust controllability of the singular distributed parameter control system are obtained,in which the controllability for singular distributed parameter control system is not destroyed,if we perturb the equation by small bounded linear operator.     

一类非线性系统降维状态镇定的一种新方法

提出了运动体控制领域中常见一类非线性系统的降状态镇定方法。作为例子，设计了某飞行器姿态稳定控制律，仿真结果证明了此方法的正确性和实用性。     

无缺陷产品设计的基本模型

基于随机优化稳健设计的原理研究了无缺陷产品设计的基念和模型，并示例证明。这一方法可以保证产品在无缺陷下获得优质和低成本。     

船舶运动控制综述与展望

对欠驱动水面船舶的非线性控制做了简要的论述,首先说明了问题的背景和重要意义,其次介绍了欠驱动船舶常用的非线性控制方法,最终提出了该领域的一些开放性的问题。     

Reduced-order output feedback controllers for the robust H∞ performance problem

Conclusion This note considers robust H^∞ control problems for a class of systems with time-varying uncertainty lying in a hyperrectangle. It has two features: (i) Output feedback controllers are discussed instead of the state feed-back ones. It is proved that the problem can be reduced to finite-dimensional convex programming problems of finite vertex LMIs. All desired output feedback controllers can be parameterized based on the solutions of 2^m LMIs. (ii) Reduced-order controller design is considered and the design idea is also formulated as solutions to LMIs. These results are also an extension of the main theorems about reduced-order controllers discussed in ref. [8] for uncertain systems. Based on the approaches presented here, similar problems in the discrete-time case could be dealt with.     

Global Stabilization of Nonlinear Systems with Byrnes—Isidori Normal Form

1　IntroductionThe problem of the asymptotic stabilization of minimum phase nonlinear systems viasmooth state feedback has been well studied in[1— 6 ].One major methodology is by useof the nonlinear analog of the nonlinear zero dynamics notion so that,un…     

基坑监测相关规范比较

与基坑监测相关的国家规范及行业规程主要有三种,它们既有相同或相似的条文,也有差异显著的技术指标。通过对比研究,认为冶金部颁布的规范较为全面、详细;国家规范反映了更新的技术进展。