查询词典 dynamical friction

A dynamic friction model is build and a friction observer is designed for ordinary position servo system.

从分析结果得知影响伺服系统低速性能的主要因素是摩擦力。因此，要提高电液伺服系统的低速性能，必须对摩擦力进行补偿。

The accuracy of the friction model directly affects the position precision,dynamic characteristics and friction compensation of mechanical systems.

针对预滑动摩擦的建模，重点介绍了几种描述预滑动摩擦的数学模型，并对各种模型的特点分别加以讨论。

The procedures of friction signal processing and parameter identification are also presented. In addition, the dynamic characteristics of systems with friction are studied using numerical techniques.

摩擦现象在微观尺度上具有极其复杂的物理学本质，在一般的机械系统领域对摩擦的研究中，都是力求从宏观尺度上最好的解释和模拟摩擦现象和行为。

Based on the analysis of the process of sand reclamation by way of centrifugal friction,the dynamic calculation on sand movement is made,and the system of sand reclamation by friction with the help of striking is presented.

在分析离心摩擦式旧砂再生过程的基础上，对砂子的运动作了动力学计算，得出了以摩擦为主、撞击为辅的再生产方式的结论。

In order to analyze the result caused by the frictional dynamic character in servo system,and test the validity of various friction compensation methods,a simulation scheme for dynamic friction model is required.

为了深入分析摩擦力动态特性在高精度的伺服系统控制中造成的影响，检验摩擦补偿方法对动态摩擦的补偿效果，需要建立一个有效的动态仿真摩擦模型。

Comparatively, the dynamic friction models can describe the friction more completely, with their complicated forms, which makes it difficult to identify related parameters.

再次， 简要概述了摩擦建模对机械系统动力学行为的影响，以及在高精度定位系统的控制中的作用。

Next, a few important friction models in common use are discussed, including six static and seven dynamic friction models. The forms, characteristics and applicability of these models are discussed in detail.

其次， 系统地介绍了几种较为重要的、常用的摩擦模型，包括6种静态摩擦模型和7种动态摩擦模型，并对每一种模型的构成，特点和适用范围等进行了较为详细地论述。

In this paper,a numerical solution for radial journal bearings with liquid hydro-dynamic lubrication is analysed, numerical expressions for oil fiton pressure, bearing capacity , friction moment,and leakage at the bearing ends are derived,bearing capacity,flow rate, friction moment,and eccentric angle of the load under 14 different temperatures and 14 different load eccentricities are calculated.

采用数值法分析解算液体动压向心滑动轴承，推导了油膜压力、承载力、摩擦力矩和端泄流量等的数值表达形式，计算了14个不同温度点及14种不同偏心率下的承载力、流量、摩擦力矩、载荷偏位角，并通过AUTOCAD绘制了它们之间的影响曲线。认为偏心率及油温对承载力影响很大，设计时应加以限制。

The energy equation of structural response under cyclic reversed loads is set up. Through the calculation and comparison of input energy, elastic strain energy, accumulative plastic dissipating energy and friction-damp dissipating energy, it is indicated that friction-damp dissipating energy should be increased as much as possible by reasonable design to decrease structural inelastic deformation and damage.

建立了结构在低周反复荷载作用下的能量反应方程，通过总输入能、弹性应变能、塑性累积耗能和摩阻控制装置耗能的计算和比较，分析了普通低剪力墙和新型低剪力墙的耗能能力，指出为减轻结构的非弹性变形和破损程度，应通过合理设计来尽量增大摩阻控制装置耗能。

The computation results of the movement of robots of different mass, which are imposed on with different friction, were given. The mass only influences the time that the robot needs to reach a steady state while the friction influences both its final steady velocity and time.

不同质量机器人在不同摩擦力下运动规律的计算结果表明，质量只影响机器人达到稳定运动的时间，而摩擦力会影响机器人的稳定运动速度和达到稳定运动的时间。

Must have Coordination and negotiation skill, flexible ideas, and be punctilious person.

必须具备较好的协调与谈判能力，头脑灵活，工作认真仔细

Result: 18 patients are all with simple eye.The pigment mole lies in nasal and temple sides of the ball conjunctiva,in which 2 lie in lacrimal caruncle and semilunar plica.

结果：18例患者均为单眼，色素痣大多数位于内外侧睑裂部球结膜面，2例位于泪阜及半月皱襞，经激光治疗后，10例色素痣消失，有5例行再次激光后消失，2例行第三次激光后消失，1例第四次激光后消失。