查询词典 forward-biased

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。

"The idea to create a low cut performance shoe came from Kobe, but the evidence we needed to move forward, came from working with the Nike Sports Research Lab," said Avar.

创造低统高性能篮球鞋的概念来自Kobe，但我们需要往前迈进的证据则出自Nike运动研究实验室。

Combining the precise exponential matrix calculation with the basic assumptions of constant average acceleration method of the Newmark family, explicit integral method with Taylor series and its algorithm are put forward.

将Newmark-β法中常平均加速度法的基本假定与精细指数算法结合，根据指数矩阵的Taylor级数展开式，提出了动力方程的显式级数解，并设计了相应的时程积分算法。

Children avidly look forward to the arrival of Children's Day because it is the happiest time for them every year.

孩子们热切地盼望着儿童节的到来，因为每年的这个时候他们最快乐。

Going forward, I'm adding avocado to all my salads and sandwiches.

多说一句，我把鳄梨加到所有的沙拉和三文治中。

She always looked forward to the avocado season.

她总是很期待鳄梨旺季。

That might have been enough to secure four more years in power. Instead the usually avuncular Ganga was provoked into striding the gangways of the auditorium haranguing delegates as they came forward to cast their votes.

然而，劳斯对中国的拒绝惹得一向慈眉善目的冈加火冒三丈，他大步流星地走上会堂的过道，在那些上前投票的代表们面前发表演讲，对劳斯大加讨伐。

I can't say I look forward to the failures that await me.

我不会说自己在盼望那些等待着我的失败。

Well, I'm sure that I won't be the only one looking forward to reading your articles … and seeing some pictures of Axel and Abie!

嗯，我相信我不会是唯一一个期待著阅读你的文章。。。，看到一些照片的阿克塞尔和冷杉！

A mechanical calculation method, which was used to analyze the deformation of axial symmetry in plastic process , is put forward in this paper.

针对塑性加工过程中的轴对称变形问题，提出了一种力学计算方法，论证了圆环坐标系的坐标变换法则和主要力学方程，然后将理论计算值与实验条件下的实测值进行对比。

Nowadays, most of research are to build a transmutative Petri Nets through adding controlling place sets, controlling arc sets and controlling policy to the basic Petri Nets, while the Controlled Petri Nets could be used to argue many controlling theory problems conveniently and to induce many logically and physically supervisory and solve the Event Feedback Controlling Problems and State Feedback Controlling Problem in DEDS supervisory theory.

目前大多数的研究表现为在变形后的受控Petri网基础上，利用各种方法求得各种逻辑型、结构型控制器，解决DEDS监控理论中的事件反馈控制问题与状态反馈控制问题。

On one hand, there are discussions with the works council and union about extension of short time working up to the end of September.

一方面，有讨论，工程理事会和联盟关于延长工作时间短至9月底。