摩擦力

It is focused on a valve-controlled asymmetric cylinder system. The cause and compensation method of friction are researched, and the influence of system friction on electro-hydraulic servo system is analyzed. Then the friction is outline measured and online observed.

以阀控非对称缸系统为研究对象，探讨了摩擦力的产生原因和补偿方法，分析了液压缸的摩擦力对电液伺服系统的影响，对摩擦力进行了离线计算和在线观测两方面的研究。

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 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。

For nonlinear friction force in hydraulic position tracking system, partition compensation is to solve the problem of large approximation error caused by non-smooth characteristic of friction when the whole friction is compensated by one fuzzy neural network.

针对液压位置跟踪系统中的非线性摩擦力，提出对摩擦力模型的不同分量分别进行补偿的分部补偿算法，以解决用模糊神经网络对摩擦力整体进行补偿时，因摩擦力非光滑特性引起较大逼近误差的问题。

An adaptive friction compensation scheme for direct drive valve was proposed based on LuGre model.

针对直接驱动阀阀芯摩擦力，论述了基于模型的摩擦力自适应补偿。

Through analysis of the cause of formation of yarn hairiness,this paper mainly discussed how to enhance the control of transverse friction field;how to improve the yarn quality and the mechanism to reduce hairiness.

通过对纱线毛羽成因的分析，探讨了加强横向摩擦力界控制，提高纱线质量，减少毛羽的机理；详细分析了横向摩擦力界的分布。

The static friction and kinetic friction of cylinder are tested. The mathematical model of friction is presented. Then author proposes the mechanical method to improve the friction character of cylinder.

第二章研究了气缸摩擦力的特性，对静/动摩擦力进行了全面的测试，提出了摩擦力数学模型，并提出了改善气缸摩擦力特性的机械措施。

It tires not nor does it boast of its power, but belongs to the air, travelling it may be six thousand miles to and from its northern nesting home feeding its flown young as it flies and slipping through a medium that seemstohelpitspassageevenwhen the wind is adverse.

这时虽有空气和水与运动着的鸟和船这样的物体之间的面接触，但与slide运动相比，可把这种面接触的摩擦力视为极小的数值，好象没有摩擦力一样。

It tires not nor does it boast of its power, but belongs to the air, travelling it may be six thousand miles to and from its northern nesting home feeding its flown young as it flies and slipping through a medium that seems to help its passage evenwhen the wind is adverse.

这时虽有空气和水与运动着的鸟和船这样的物体之间的面接触，但与slide运动相比，可把这种面接触的摩擦力视为极小的数值，好象没有摩擦力一样。

A friction compensation algorithm based on the feed-forward and fuzzy theory is implemented after analyzing the friction characteristic of HIT-1 dextrous robot hand.

在基于指尖力的阻抗控制中，定性分析了摩擦力对自由空间中的位置跟踪和约束空间中的力控制的影响，并结合HIT-1机器人灵巧手摩擦力的具体特点，提出了前馈加模糊的摩擦力补偿方法。

The absorption and distribution of chromium were studied in ryeusing nutrient culture technique and pot experiment.

采用不同浓度K2CrO4(0，0.4，0.8和1.2 mmol/L)的Hoagland营养液处理黑麦幼苗，测定铬在黑麦体内的亚细胞分布、铬化学形态及不同部位的积累。

By analyzing theory foundation of mathematical morphology in the digital image processing, researching morphology arithmetic of the binary Image, discussing two basic forms for the least structure element: dilation and erosion.

通过分析数学形态学在图像中的理论基础，研究二值图像的形态分析算法，探讨最小结构元素的两种基本形态：膨胀和腐蚀；分析了数学形态学复杂算法的基本原理，把数学形态学的部分并行处理理念引入到家实际应用中。