跟踪误差

一种含模型偏差的GPS伪码跟踪误差估计器

GPS PN Code Tracking Error Estimator with Model Bias

用BP网的跟踪误差辨识建模及跟踪性能评价

Identification and Modeling of Tracking Error Using BP Neural Network and Evaluation of Tracking Performance

GPS考虑副瓣的多径跟踪误差研究

Study of Multipath Tracking Errors Considering Autocorrelation Sidelobe in GPS

针对目标做高机动运动时跟踪误差增大的问题，提出了一种基于H∞次优滤波器的模糊鲁棒跟踪器。

During tracking of a target , the tracking error increases dramatically when the target is highly maneuvering .

具有VaR约束的跟踪误差投资组合鲁棒优化模型

Robust Optimal Tracking Error Portfolio Models Based on VaR

当前高速高精度的数控加工设备，其控制算法大多采用跟踪误差的PID控制实现。

For current high-speed CNC machining equipment , PID control method is commonly adopted to reduce the tracking error .

跟踪误差（trackingerror）是为了衡量指数基金的投资风险而提出的一个概念。一般而言，跟踪误差被定义为指数化投资组合与基准投资组合收益率之间的差额。

Tracking error measures the investment risk of index fund , which is defined as yield difference between the index portfolio and the benchmark portfolio .

为了分析多径干扰对多径消除技术（MET）的影响，建立了MET的跟踪误差模型。

To analyze the effect of multipath disturbance on multipath eliminating technique ( MET ), the error model of MET is established .

该方法考虑了跟踪误差和逼近误差对参数自适应律的共同影响，并对模糊逼近误差和外扰采用H∞补偿控制。

The adaptive law utilizes two type of errors in the adaptive fuzzy systems , the tracking error and ( approximation error . )

分析了直接下变频导航接收机中，I、Q信号的非正交引起的载波及伪码的跟踪误差。

In direct conversion navigation receiver , due to the IQ mismatch , there will be track error in carrier phase and code phase .

首先设计一个以系统本身状态增量和跟踪误差作为状态向量的扩展系统，然后在LMI优化框架下，设计离散约束系统的H∞跟踪控制律。

In the framework of LMI optimization , we design H ∞ tracking control law for discrete-time system subject to control constraints .

匝道调节率由PID控制器决定，而PID的参数由模糊逻辑根据密度跟踪误差和误差的变化来调整。

The ramp metering rate is determined by the PID controller whose parameters are tuned by fuzzy logic according to the density tracking error and error variation .

基于Lyapunov定理证明了闭环系统稳定，跟踪误差指数收敛到任意小的有界紧集内。

It has been proved that the tracking error converge to an arbitrary small compact set in finite time by Lyapunov stability theorem .

提出采用码跟踪误差增量作为GNSS无线频率兼容的评估参数之一。

Proposed the code tracking error increment as one of GNSS radio frequency compatible assessment parameters .

然后与H∞相结合，通过选取控制变量的权重因子，可以将逼近误差和外部扰动对跟踪误差的影响减小到任意给定的标准。

In the study , the effect of both fuzzy logic approximation error and external disturbance on the tracking error is attenuated to a prescribed level by adequately selecting the weighting factor .

推导了GPS接收机中多径效应引入的最大载波相位跟踪误差的闭合形式。

The closed expression form of the maximum carrier phase tracking error caused by multipath effect is derived in this paper based on multipath signal characteristics and GPS receiver work mechanism .

设计的多变量积分Backstepping控制器，可以保证系统的跟踪误差收敛至较小的球域内。

The multivariable integrated backstepping controller can also guarantee the tracking error converge into a small ball field .

但实际上对于自由曲线的加工，仅控制跟踪误差并不能严格保证最终的加工轨迹轮廓误差的消除，传统的PID闭环控制模型并不能保证轮廓精度。

But in fact reducing the tracking error controlling can not strictly ensure the contour errors reduced . It means that the traditional PID closed-loop controller does not guarantee the accuracy .

所设计的间接自适应控制器使系统在Lyapunov意义下稳定，且跟踪误差趋近于0。

The designed indirect adaptive controller makes the system stable in the Lyapunov sense , and makes the tracking error convergence to zero as well .

第四章介绍了ETF的跟踪误差。

In Chapter 4 , we give an introduction to index of error of foresee of ETF .

采用Lyapunov函数方法证明系统状态变量、网络权值矢量、网络逼近误差界的在线估计及输出跟踪误差的收敛性。

The states of the system , network weights , network approximation errors ′ estimations and tracking error are proved to be convergence using Lyapunov methods .

通过Matlab对比加入速度和加速度误差补偿控制策略前后的系统跟踪误差，可得出速度和加速度误差补偿能提高光电跟踪系统跟踪精度。

Through Matlab contrasting the track error before and after adding speed error and acceleration compensation control , the speed and acceleration error compensation could improve the track precision of the photoelectric track system .

基于Lyapunov稳定性理论，分析证明了闭环系统所涉及的变量是有界的，并且，跟踪误差收敛到零的邻域内。

Based on Lyapunov stability theory , it is proved that all variables in the closed-loop system are bounded and tracking error converges to a neighborhood of zero .

第五章介绍了ETF的跟踪误差及其产生原因。

In Chapter 5 , we give an introduction to the reason of index of error of foresee of ETF .

针对模型参考自适应控制的区域稳定性问题，采用Lyapunov直接法分析参数收敛与系统跟踪误差之间的关系。

Considering the local stability problem of model reference adaptive control ( MRAC ), the relation between parameter convergence and system tracking error is analyzed by using Lyapunov direct method .

利用Lyapunov理论证明了该控制系统是一致终结有界，且观测误差和跟踪误差收敛到原点的一个小邻域内。

Based on Lyapunov stability theory , it is proved that the closed-loop control system is uniformly ultimately bounded with the tracking errors converging to the neighborhoods of the origin exponentially .

本文还研究了GALILEO接收机中的多径效应，推导多径效应引入的环路跟踪误差，并提出两种消除多径效应的方法。

The multi-path effect in Galileo receiver and loop track error caused by multi-path effect are discussed , two methods of eliminating multi-path effect are presented .

第六章介绍了ETF指数基金之跟踪误差预测和分解。

In Chapter 6 , we give an introduction to ETF . It is about its index of error of foresee and decomposition .

文章阐述系统总体结构的设计原则以及二极磁铁（B）和四极磁铁（Q）磁场的跟踪误差要求。

The main design principle of the power supply system is described in the paper , and some considerations for close dipole magnet ( B ) and quadrupole magnet ( Q ) field tracking during beam acceleration period are also discussed .

退化现象可能导致基于粒子滤波（PF）的轮廓跟踪误差增大甚至失败。

Degeneracy phenomenon is a common problem of contour tracking based on Particle Filter ( PF ) . It can augment the error of tracking or even make it failed .