查询词典 tracking

Because of the multimodality of its autocorrelation function, it makes acquisition and tracking more challenging.

由于其自相关函数的多峰性，将增加这种信号的捕获难度和误跟踪的可能性。

The current government is autocratic, but it is also adept at keeping the nation together by fast-tracking reforms.

目前的政府是专制，但它也善于通过快速跟进的改革让国家凝聚在一起。

Companies are using computer equipment automatic tracking control system, product quality and stability.

公司设备均采用电脑自动跟踪控制系统，产品质量稳定。

It has been a hankering goal to develop self-tracking arc welding robots with high level of automaticity and intelligence.

研制高度自动化和智能化的自跟踪式弧焊机器人以取代示教式弧焊机器人一直是人们热衷的一个目标。

The design of autonomous flight tracking control system for helicopter is an important issue.

首先研究了自主式控制系统的关键问题，然后提出一种智能自主式航迹控制系统的结构，采用了模块化设计思想，对直升机对象的航迹控制系统进行设计。

The methods of autonomously tracking and rebuilding of unknown environment with force sensor of robot is proposed, too.

并通过重构未知环境几何模型，使机器人具有感知未知环境信息并实时修改环境模型的能力，提高了机器人的智能性和自主性。

The particulate-tracking autoradiograph technique is a powerful tool for studying the behaviors of boron in materials.

径迹显微技术是研究硼的晶界偏聚的行之有效的方法。

The hot stamping processes of B-bearing steel sheet after hot rolling were simulated at Gleeble 1500, the microstructure and mechanical properties were analyzed at different heat treatment conditions, and the segregation of boron and precipitation of boron phase were investigated by X-ray diffraction analysis and particulate tracking autoradiograph technology.

通过Gleeble1500热／力模拟实验机对轧后含硼钢板进行了热冲压过程模拟，分析了各种热处理条件对含硼钢组织性能的影响，并采用X射线衍射技术和径迹照相技术分析了硼的偏聚和硼相析出情况。

Aiming at a class of typical dynamic hysteretic models, a kind of sliding mode tracking controller based on dynamic sliding mode principle is proposed. A dual-phase convergent process is implemented by constructing an auxiliary sliding mode variable.

针对一种典型的动态迟滞模型，提出一种基于动态滑模原理的跟踪控制器，通过构造辅助的滑模变量来实现动态滑模控制的两阶段收敛。

Based on the analysis of the mechanism of robot manipulators, a trajectory tracking controlling research model is first built up with ADAMS, and its mathematical model is formulated through the study of robot kinematics and dynamics. After the modeling errors are analyzed in practical robotic systems, a conception of centralized error is brought forward according to the theory of weighting functions. In the case of modeling errors' exist, the robotic uncertain model is derived by introducing an auxiliary control variable into inverse dynamic analysis. The control strategy of robust exponential convergence is applied to the robotic uncertain model, the applicable conditions and the applicable controller with this application are presented. The stable control effect under three main model uncertainties (parametric errors, joint disturbs, joint frictions) are systematically studied on the previously built research model. The problems of robust exponential convergence controller which often results in unstable output and so produces a large relative error when the input trajectory is in a small range are resolved by adjusting the control parameters based on the controller's structure.

本文在机械手的机械结构分析基础上，利用ADAMS建立了用于机械手轨线跟踪控制研究的机械手模型；通过对机器人运动学和动力学问题的研究，建立了机械手研究的数学模型；分析了机器人系统中模型误差的主要来源，根据加权函数法分析，提出了模型集中误差的概念；在存有模型误差的情况下，采用逆动力学结构并引入辅助控制量，由机器人误差模型推导了机器人非确定性模型；提出了采用鲁棒指数收敛法对上述机器人非确定性模型进行鲁棒镇定的控制策略，并给出了对机器人进行鲁棒指数收敛控制时系统不确定因素应满足的匹配条件；针对机械手研究模型，深入研究了鲁棒指数收敛控制器对机器人系统中常见的模型参数误差、关节扰动、关节摩擦等不确定因素的镇定控制效果；针对鲁棒指数收敛控制器易产生控制量振荡的问题以及在小范围内系统轨线跟踪的稳态误差过大问题，本文分别提出了基于控制器结构的控制参数调整法和基于轨线跟踪范围大小的控制参数分段切换法。

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。