查询词典 freedom of motion

While the idea and the prototype of the three-degree-of-freedom motor came into being, it is more convenient to realize the motion of the robot joint where the demand on workspace is low but three DOF is required. It also combines the merits of simplified system construction, minimized machine volume, improved dynamic and static performance with high position accuracy.

三自由度球形电机设计概念及样机的出现，使得机器人关节的空间三维运动可以在一个较小的工作空间中完成，简化了系统结构，减小了机构体积，有利于提高系统的动、静态性能和定位精度。

By using the theorem of moment of momentum with respect to the mass center, the ship motion is devided into translation and rotation respect to the ship mass center, and the six-degree-freedom nonlinear equation can be deduced based on the exactly analysing the force acting on the ship.

基於刚体运动学理论，将船舶在波浪中的运动分解为平动和绕质心的转动，在分析了船舶受力情况的基础上，运用质点系相对於质心的动量矩定理和Newton第二运动定律建立了船舶的六自由度运动的非线性藕合方程。

The design and implementation of the motion control system of a 5 degree-of-freedom navigation robot is discussed in detail.

详细论述了这款5自由度脊柱微创手术导航机器人运动控制系统的设计与实现。

The research scope of this paper includes:(1) According to the vehicle motion parameters, the 9 degrees of freedom vehicle brake model has been established by utilizing Newtonian mechanics, which can be reduced step by step to a double-wheel vehicle brake model and to a single-wheel vehicle brake model.

为了改进传统的逻辑门限ABS的局限性，本文对基于滑移率的汽车防抱死制动系统的上述关键技术及实现方法进行了研究，并以研究成果为基础完成了相应工程项目的研制任务。

Bifurcation and chaos of periodic motion s of a single-degree-of-freedom system with piecewise-linearity is studied.

研究了一类单自由度分段线性系统周期运动的分岔和混沌现象。

The vibro-impact systems are familiar with the non-smooth dynamic systems.The dynamics research of the vibro-impact systems not only is significant in theory but also has practical values in engineering.Firstly,using the Poincaré map method,we get an existent criterion of single impact period-n motion in a two-degree-of-freedom vibro-impact system with damper.It is shown that our conclusions are valid through the numerical simulations.Moreover,the satiability of periodic motions is studied and the correspon...

基于Poincaré映射的方法，通过解析的方法导出了一类具有阻尼的两自由度碰撞振动系统的单碰周期n次谐运动存在性判据，经过数值模拟验证了理论分析的正确性，并给出了分析其稳定性的判别公式，通过数值模拟，讨论系统的局部分岔与全局分岔，同时比较了系统参数变化对其周期运动的影响，发现在强阻尼、弱激励、小质量比、较大恢复系数下系统将会出现较多的有规律的周期碰撞。

A maneuvering mathematical model for controllable pitch propeller ships with three degrees of freedom was established according to separate modeling theory to simulate ships' maneuvering motion in ship-handling simulator.

0引言为获得良好的船舶操纵性能，大多数客船、拖网渔船、军舰等都采用可调螺距螺旋桨作为其推进方式。

Considered the factor of damping,a single degree of freedom s dynamic model of the high-speed cam mechanism is established.Choosing the law of sine acceleration motion as the excitation function,a displacement and acceleration dynamic response equations of the main vibration phase and residual vibration phase,the working dynamic response change curve through the inferential reasoning working end movement equation is derived.The result is obtained that different period and damping ratio have different impact

建立了考虑阻尼因素的等效单自由度高速凸轮机构的动力学模型，以正弦加速度运动规律方程为激振函数，推导出了从动件系统主振段和余振段的位移和加速度动态响应方程并绘制出了动态响应变化曲线，得出了不同阻尼比和周期比对主振段和余振段的动态响应，从而为高速凸轮机构的合理设计提供了一定的理论依据。

Spend shunt-wound robot orgnaization in the light of the 6 freedom with drive of communication servo electric machinery, analysed its kinematic go against solution, undertook orbit plans, designed trends slippery model to change structural control is algorithmic, built the emulation model of robot spur track, achieved the expectation motion orbit to spur track dog.

针对以交流伺服电机驱动的六自由度并联机器人机构，分析了其运动学逆解，进行了轨迹规划，设计了动态滑模变结构控制算法，建立了机器人支路的仿真模型，完成了对支路的期望运动轨迹的跟踪。

The computation results show that under two degree-of-freedom motion, the process of enveloping the worm is of point contact form, and the worm surface is generated by contact points, regardless of the type of generant, such as straight line, plane and disk annular curved surface.

本文又首次提出并建立了在双自由度运动状态下，用平面砂轮和盘状环形砂轮包络加工圆柱蜗杆传动的方案及数学模型，其目的在于拓宽包络圆柱蜗杆传动的应用范围，对此也编制了相应的计算机软件。

Neither the killing of Mr Zarqawi nor any breakthrough on the political front will stop the insurgency and the fratricidal murders in their tracks.

在对危险的南部地区访问时，他斥责什叶派民兵领导人对中央集权的挑衅行为。

In fact,I've got him on the satellite mobile right now.

实际上 我们已接通卫星可视电话了