1.This article describes the development and application of friction stir welding, consumable friction surfacing and other fiction processing technologies called science friction.
本文重点介绍了摩擦搅拌焊、耗材摩擦敷层等被称为是“科学摩擦 (Science Friction)”的先进摩擦焊接技术及摩擦热加工在其他方面的应用
2.This paper presents the principle of friction stir processing.
本文介绍了搅拌摩擦处理FSP(Friction Stir Processins)。
3.Presents a simple method of compensating friction against the character of the nonlinear model of a brushless DC motor system which transfers the original system model to a simple linear model using the method of input-output linearization, and estimates the coulomb friction in the system in real-time using a nonlinear friction estimator, and then compensate the friction in the system using a friction feedforward, and concludes from simulation results that this method can effectively eliminate the influence of friction in brushless DC motor systems.
针对无刷直流电动机系统的非线性数学模型特点，提出了一种简单的摩擦补偿方法.该方法首先利用输入输出线性化方法将原系统模型转化为一种简单的线性模型，然后给出一种非线性摩擦估计器实时估计系统中的库仑摩擦值，最后利用摩擦前馈补偿方法对其进行补偿.仿真结果表明该方法可以有效地抑制无刷直流电动机系统中的摩擦影响.
4.Under various temperature and working pressure, the models of the maximum static friction force, the viscous friction coefficient and the Coulomb friction are obtained by analyzing the test data. The influence of temperature on the friction models is analyzed. The friction models can be applied to model and simulate the pneumatic cylinder driving system and predict the stick-slip of pneumatic cylinders.
对低速脂润滑气缸的摩擦力模型进行实验研究,搭建出气缸的摩擦力特性测试实验台,在不同温度和工作压力工况下,通过实验得到气缸的最大静摩擦力模型、粘性摩擦系数模型及库仑摩擦力变化规律,考察了温度对摩擦力特性的影响,可以为气缸驱动系统运动仿真以及爬行现象预测提供摩擦力模型支持．
5.Then, two kinds of nonlinearities, backlash and friction are studied in detail. Anti-backlash scheme using bias-voltage control method in the system is introduced. And a friction model is established with MATLAB Simulink toolbox, which is composed of static friction, Coulomb friction and viscous friction.
对系统中两种非线性因素——齿隙和摩擦进行了研究，介绍了系统所采用的偏置电压消除齿隙方案，建立了基于“静摩擦+库仑摩擦+粘滞摩擦”的Simulink的非线性摩擦仿真模型，并从仿真和系统实际调试结果两方面说明了伺服系统中摩擦非线性因素对系统造成的不利影响。
6.We use different coefficients of bottom friction, bottom roughness and horizontal turbulent friction for the numerical test. The results show that, when coefficient of bottom friction is 0.002 to 0.003, coefficient of bottom roughness is 1×10-3 to 2×10-3m and coefficient of horizontal turbulent friction is 1×102 to 5×103m2/s, the computed values of the tide and tidal currents agree generally with the observed ones.
选用不同的海底摩擦系数、海底粗糙度系数以及水平湍流摩擦系数进行数值试验,试验结果表明:当海底摩擦系数取2×10-3~3×10-3,海底粗糙度系数取1×10-3~2×10-3m ,而水平湍流摩擦系数取1×102~5×103m2/s时,模拟所得潮汐、潮流结果与实测数据吻合较好;
7.This text commences from appearance mechanism of ball screw friction moment, combining its structure characteristics, analyzing influence factor of ball screw friction moment. Also passing bear force analysis, of ball bearing in the rolling way, stressed pre-tighten force influence to friction moment, getting the relation of pre-tighten force and friction moment, provide theories support for testing methods research and results analysis.
本文首先从滚珠丝杠副摩擦力矩的产生机理入手，结合其结构特点，分析了滚珠丝杠副摩擦力矩的影响因素，并通过对滚珠在滚道中的受力分析，重点分析了预紧力对摩擦力矩的影响，得出预紧力与摩擦力矩的关系式，为测试方法研究及测试结果分析提供了理论支持；
8.Abstract: Molecular deposition (MD) film, a nano film, is assembled by the interaction of static charge between cationic and anionic compounds.The micro-friction properties of an MD film on silica has been studied with atomic force microscope (AFM).It has been found that the MD film has lower coefficient of friction as compared with the original surface of silica.Moreover, based on the analyses of the surface force versus distance curves, photographic image, friction force image, and modulated force image, it is concluded that the friction reduction effect of MD film on silica is attributed to the surface adhesion reduction and surface micro-modification.
文摘:利用原子力显微镜对石英岩表面单层分子沉积膜的微观摩擦特性进行了研究，发现该分子沉积膜具有一定的减摩性.通过对其表面力-位移曲线、表面形貌像、调制力像和摩擦力像的进一步分析表明，石英岩表面分子沉积膜具有减摩作用的原因在于它能够降低表面的粘着力并对表面具有微观修饰作用.
9.The friction behavior of Al2O3 to friction pairs of hard-soft metal friction pairs is better than that of hard-hard metal friction pairs,and the add amount of Al2O3 should not be too high.
Al2O3对硬-软金属配合的摩擦副作用效果强于对硬-硬金属配合的摩擦副,添加量不宜过高。
10.Two simple friction coefficient models,Coulomb friction law and static friction model,are introduced. They are combined with the tire unified brush theory to analyze tire friction problem.
介绍了2种简单的摩擦系数模型(库仑摩擦定律、静摩擦力模型),并将其与轮胎统一刷子理论模型结合起来分析轮胎的摩擦问题。
