线性控制系统的能控性与能观性

控制系统的能控性与能观性是建立在状态空间描述的基础之上的.能控性与能观性是利用状态方程、输出方程分析输入u[t]对状态x[t]的控制能力和输出y[t]对状态的反映能力.一个系统若具有很好的能控性和能观性,我们就可以对它实施最优控制.     

三水箱多变量液位控制实验设计

三容水箱液位控制实验系统是一种非线性、强耦合、多变量和大滞后的复杂系统。该文首先介绍三容水箱液位控制实验系统的实物系统装置,然后设计了几种典型的多变量液位控制实验,并给出了被控对象的数学模型,最后对上述系统被控对象的能控性和能观性进行了分析。     

李雅普诺夫方程的推广

定义了能控性矩阵及能观性矩阵,利用矩阵方程讨论了推广的李雅普诺夫方程的解的存在及唯一性.     

一类广义系统的能控性

能控性是现代控制论的基本问题,广义系统的能控性是难题之一,引起许多专家学者的重视和探究.通过一个定理,在系统正则的条件下,将系统分为快、慢两个子系统并分别讨论了它们的能控问题,得到了一类广义系统能控的充要条件,最后给出了一个范例.     

非线性结构系统能控性参数分析

文章研究了一类非线性组合系统的结构能控性,将非线性系统模型置于非交换环上用以得到非线性系统的传递函数(矩阵).根据频域上线性系统能控的系统传递函数不存在零极点抵消的判据,获得非线性系统结构能控的条件,并用实例证明所获得的判据对分析非线性系统结构能控性是可行的.     

Volterra协作种群系统的能控性

研究了具齐次Neumann边界条件的非线性抛物积微分系统的精确零能控.首先建立对偶的线性化系统Carleman型估计;由此得到线性化系统的能控性;最后根据Kakutanis’s不动点定理证明非线性问题的零能控.     

连续时间线性时不变系统的能控性判据研究

研究了连续时间线性时不变系统的能控性判据,给出格拉姆判据更精确的表达及证明.并给出秩判据及PBH判据的另外证明.     

二维离散系统的模能控性与模能观性

本文给出了二维离散系统在一般模型下的模能控与模能观定义,讨论了它的充要判据,对可分系统给出了简便判据,给出了一类系统模能观性在状态空间上的几何解释。     

仿射非线性系统的动态反馈线性化与系统线性近似的能控性

用微分几何方法讨论了m=n-1仿射非线性系统的动态反馈线性化与系统的线性近似能控性的关系，出了系统可动态反馈线性化的条件。     

控制时滞线性时不变区间奇异系统的R-能控性

根据控制时滞线性奇异系统理论和区间奇异系统理论,运用矩阵的初等变换,得到控制时滞线性奇异系统能控以及R-能控的充要条件。并利用所得结果,解决了控制时滞线性时不变区间奇异系统的R-能控问题。     

Timing issues in distributed testing

The objective of conformance testing is to determine whether an implementation under test (IUT) conforms to its specification. In distributed test architecture where there are multiple remote testers, the objective can be complicated by the fact that testers may encounter controllability and observability problems during the application of a test sequence. A certain amount of work has been done in the area of generating test sequence that is free from these problems. However, few researchers investigate them from the aspect of test execution. This work studies the test execution phase when test sequences are applied to the imple- mentation and it is pointed out that controllability and observability problems can be resolved if and only if the test system im- plements some timing constraints. When determining these constraints, the dynamic time information during test is taken into account, which reduces the test execution time and improves test efficiency further.     

Time domain analysis for discrete difference equation on discrete linear system controllable problem''s research

We usually describle a comparatively more complex control system, especially a multi-inputs and multioutputs system by time domation analytical procedure. While the system's controllability means whether the system is controllable according to certain requirements. It involves not only the system's outputs' controllability but also the controllability of the system's partial or total conditions. The movement is described by difference equation in the linear discrete-time system. Therefore, the problem of controllability of the linear discrete-time system has been converted into a problem of the controllability of discrete-time difference equation. The thesis makes out the determination method of the discrete-time system's controllability and puts forward the sufficient and necessary conditions to determine it's controllability by making a study on the controllability of the linear discrete-time equation.     

分布式环境下基于多UIO 的测试序列生成方法

In developing distributed systems, conformance testing is required to determine whether an implementation under test （IUT） conforms to its specification. With distributed test architectures involving multiple remote testers, testing approaches may become more complicated because of issues known as controllability and observability problems. Based on a finite state machine （FSM） representation of the system＇s specification, this paper proposes a new method to generate a test sequence utilizing multiple UIO sequences. The method is essentially guided by the way of minimizing the use of external coordination messages and input/output operations. Experiments are given to evaluate the proposed method.     

Valve-based compensation for controllability improvement of the energy-saving electrohydraulic flow matching system

The energy-saving electrohydraulic flow matching (EFM) system opens up an opportunity to minimize valve losses by fully opening the control valves, but the controllability is lost under overrunning load conditions. To address this issue, this paper proposes a valve-based compensator to improve the controllability of the energy-saving EFM system. The valve-based compensator consists of a static compensator and a differential dynamic compensator based on load conditions. The energy efficiency, the stability performance, and the damping characteristic are analyzed under different control parameters. A parameter selection method is used to improve the efficiency, ensure the stability performance, and obtain good dynamic behavior. A test rig with a 2-t hydraulic excavator is built, and experimental tests are carried out to validate the proposed valve-based compensator. The experimental results indicate that the controllability of the EFM system is improved, and the characteristic of high energy efficiency is obtained by the proposed compensator.     

非线性切换系统的镇定与非光滑控制Lyapunov函数

对构建一般非线性切换系统的切换律进行了讨论,由系统的渐近能控性出发,在一定的假设前提下,得出了存在依赖于状态的切换律,使闭环系统在广义的意义下渐近稳定的结论.结论推广到了仿射控制系统,给出了使系统镇定的一个充分条件.     

基于光电检测和PLC控制的自动化圆孔倒角设备的设计与实现

根据汽车滑动轴承注油孔倒角的加工工艺要求,采用PLC控制器实现对光电检测系统、气动系统、交流伺服系统及人机交互系统的统一控制,并配备相应的机械系统,开发设计自动化圆孔倒角设备。实践证明,基于光电检测和PLC控制的自动化圆孔倒角设备可操作性、可控性优越,性能稳定,效益明显。