可观测性

Study on application and simulation of Kalman filter technology in SINS Because Kalman filter some merits, such as provided a fast and accurate method for SINS, adopting it to do initial alignment in this paper. The Kalman filter theory is introduced and the dynamic error vector equation of the initial alignment is derived at the first. Using velocity error as exterior value of observation, maneuverable characteristic that is influenced with system's observability and its degree is studied at length by do amount of simulations and experiences.

首先介绍了卡尔曼滤波理论及相关技术，建立了系统卡尔曼滤波的状态方程和观测方程；首先采用速度误差作为观测值，详尽的研究了系统机动特性对可观测性和可观测度的影响，并做了大量仿真实验：通过对滤波原理的分析研究了影响的原因；分别选用加速度计输出误差和转台输出姿态角误差作为外部观测值，推导建立它们的观测模型，并通过仿真证明了分析结论的正确性。

Based on two algebra Riccati equation method especially the structure of the system Hamilton matrix and system observability theory, the role of invariant zeros in constructing system reduced order controllers was given. That is, by the suitable selection of free parameters of the system H(subscript ∞) controller, some points which were symmetry with the unstable invariant zeros about the imaginary axis became the stable poles of the system controller which were not observable and could be reduced from the system, thus could get further reduced order controller.

基于2代数黎卡提方程方法，特别是系统Hamilton矩阵的结构特点和系统可观测性理论，论述了不变零点在构造系统降阶控制器中所起的作用，即通过选择控制器的自由参量，使某些不稳定的不变零点关于虚轴对称的点构成系统控制器不可观的稳定极点，从而实现了控制器进一步降阶。

So they are cleared up. The precision and velocity of initial alignment are decided by the precision and velocity of the value of the state variables.

而估计的精度和速度又由系统的可观测性所决定，故初始对准的速度和精度在很大程度上由系统的可观测性所决定。

A new observability analysis algorithm for power system state estimation based on reduced network Jacobian matrix is proposed.

提出了一种新的基于降阶网络雅可比矩阵的电力系统状态估计可观测性分析方法。

Extended Kalman filter ; multistation passive fusion tracking algorithms ; observability ; nolinear

EKF算法；被动式多站融合跟踪算法；可观测性；非线性

Then, based on the observability of SINS/GPS integrated system it has been concluded that the observability of the attitude errors of the integrated system is very poor, and the nonsingular condition of the obervability matrix has been given by means of the theoretical analysis.

首先建立起捷联惯导系统与全球定位系统相组合系统的数学模型，从研究SINS／GPS组合系统的可观测性出发，通过理论分析得出了组合系统姿态角误差可观测性很差的结论，并给出使可观测阵满秩的条件。

According to two factors between the observability and the stability in the paper, a practical phasor measurement unit configuration scheme based on weak voltage area surveillance and incomplete observability is proposed.

本文同时考虑系统可观测性和电压稳定性两方面因素，提出了一种基于电压薄弱区域监视的非完全可观测的同步相量测量单元配置方案。

Based on Pseudo-linearization and least square methods, the bearings-only target motion problem was studied under the conditions that the target takes uniform rectilinear motion in 2-dimensional space, the single observer takes uniform rectilinear motion first, and then takes rectilinear motion with constant acceleration. The necessary and sufficient observable conditions, some unobservable conditions are gained.

基于拟线性处理和最小二乘方法，在目标作匀速直线运动，单观测站作匀速直线运动，进而作匀加速直线运动的机动情形下，研究了二维纯方位系统的可观测性，得到了系统可观测性的充要条件以及系统的某些不可观测的条件。

But the precision and velocity .of the value of the state variables are decided by the observability of INS.

因此，要想研究系统状态的可估计性，必须首先分析系统状态的可观测性。

An Kalman filter positioning algorithm applied in "BeiDou" and INS integrated navigation system is proposed. then, the observability、controllability and stability of it is ratiocinated and analyzed. The observability of every state is analyzed.

针对北斗卫星定位系统和惯性导航系统设计组合导航卡尔曼滤波定位算法，接着对算法的可控性和可观性进行了分析，并分析了各个状态的可观测性；从稳定性的定义出发提出并推导了分析卡尔曼滤波器稳定性的方法，并用来分析了本文算法的稳定性和渐进稳定性。

However, as the name（read－only memory）implies, CD disks cannot be written onorchanged in any way.

然而，正如其名字所指出的那样，CD盘不能写，也不能用任何方式改变其内容。

Galvanizes steel pallet is mainly export which suits standard packing of European Union, the North America. galvanizes steel pallet is suitable to heavy rack. Pallet surface can design plate type, corrugated and the gap form, satisfies the different requirements.

镀锌钢托盘多用于出口，替代木托盘，免薰蒸，符合欧盟、北美各国对出口货物包装材料的法令要求；喷涂钢托盘适用于重载上货架之用，托盘表面根据需要制作成平板状、波纹状及间隔形式，满足不同的使用要求。