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For analyzing the relation between uncertainty of soft numerical control real-time tasks and manufacturing accuracy, a mismachining tolerance analysis method based on model is presented.

为分析软数控实时任务的不确定性与加工精度的关系,提出一种基于模型的加工误差分析方法。

In this thesis, an attempt at considering the flexible joint as non-linear torsion spring has been made.

首先,建立了刚性杆非线性关节机器人的动力学模型,之后通过一平面3R机器人进行了数值仿真,说明了在一定情况下,关节的非线性对刚性杆机器人关节变形和末端误差具有重要影响,并在此基础上,讨论了关节线性项、杆的集中质量和关节驱动加速度对机器人关节非线性特性的影响。

Compared the calculated curve and the real assay curve we can make a conclusion that: this method can calculate the melting time of the fuse at the huge short current (more than 50 times of the current rating) with the error less than 5%; the resistor and time characteristic can also be acquired, it provided the date for overvoltage calculation of the fuse model. The research of the overvoltage during fusing process is based on short circuit test of the fuse.

由计算结果与实际试验曲线对比可得:该种方法能够比较准确地计算出较大短路电流下(熔断器额定电流的50倍以上)熔断器的弧前时间,误差一般在5%以内;同时还可以算得熔断器在弧前的电阻时间特性,为开断过电压仿真计算电路中的熔断器模型提供数据。

The simulation results show that the distribution of longitudinal residual stress along the width of sheet is asymmetrical, and the residual distortion corresponds well with experimental results both in distortion pattern and deformation values on the whole sheet.

利用该模型可以得到不对称的纵向残余应力结果,残余变形的趋势在整块板上都与实验结果相同,而且变形量和实验测量值之间的误差在20%以内。

Firstly, this paper discusses the development actuality of the research on double-front axle steering system and power-train of automobile. Based on the structure of the design experiences from others, the kinematics formula of double-front axle steering system is fetched, and the mathematical model of optimization design of double rocking arms mechanism and steering trapezium mechanism is established by space geometry method. Considering the difference between the real steering angle from wheels and the ideal steering angle from the ideal formula as the objective function, the optimization design method of double-front axle steering system is presented.

本文首先论述了国内外对汽车双前桥转向系统和动力传动系统研究的发展状况,在总结前人研究设计经验的基础上推导出汽车双前桥转向系统运动学关系,运用空间几何法建立了双前桥双摇臂机构及转向梯形机构优化的数学模型,以转向轮实际转角值与理想公式求出的理想转角值之间的误差达到最小为目标函数,提出了双前桥转向系统参数的优化设计方法。

A robust mathematical design model based on the response surface method was established for steering trapezoid mechanism. In the model, movement precision during steering course was chosen as the objective function; kingpins distance, axles distance, trapezoid mechanism's bottom angle and steering arm length were defined as the design variables; minimum transmission angle and maximum angle error were considered as the restraint condition.

对于转向梯形机构,以转向过程的运动精度为目标函数,以主销中心距、轴距、转向梯形底角和转向梯形臂长度四个参数作为设计变量,以最小传动角及最大角度误差作为约束,建立了基于响应面方法的稳健设计数学模型。

Among routine three impulse control system, because reason of " false liquid location" make steam load rise and drop dynamic characteristic when curve asymmetric, degeneration, can't ask out the accurate mathematics model when and there are the systematic parameters, can't design the accurate feedforward controller either, can only realize the static feedforward , can realize that there is not error in the stable state , but does not control dynamic performance well.

而在常规的三冲量控制系统中,由于&虚假液位&的原因使得蒸汽负荷上升和下降时的动态特性曲线不对称,且系统参数具有时变性,不能求出准确的数学模型,也就不能设计出准确的前馈控制器,只能实现静态前馈,能实现稳态无误差,但对动态性能控制不好。

A floating displacement static analysis model of basic floating part of 2-stage star gear train was presented.

建立星型齿轮传动静力学系统基本浮动构件浮动位移分析的弹簧-质量模型;采用静力学分析的方法,考虑系统的误差、工况条件、构件的弹性变形等条件对系统浮动位移的影响;计算系统基本浮动构件浮动位移;分析系统主要设计参数对各构件浮动位移的影响,为星型齿轮传动系统浮动机构的设计提供依据。

A floating displacement static analysis model of basic floating part of 2-stage star gear train was presented.

摘 要:建立星型齿轮传动静力学系统基本浮动构件浮动位移分析的弹簧-质量模型;采用静力学分析的方法,考虑系统的误差、工况条件、构件的弹性变形等条件对系统浮动位移的影响;计算系统基本浮动构件浮动位移;分析系统主要设计参数对各构件浮动位移的影响,为星型齿轮传动系统浮动机构的设计提供依据。

A clearance-typed nonlinear torsional vibration model with multiple degree of freedom of star gear transmission being excited by errors of transmission and time varying meshing stiffness was established.

建立了受传递误差和时变啮合刚度激励的星型齿轮传动的间隙型多自由度非线性扭转振动模型,并用自适应变步长Gill数值积分方法进行了求解。

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推荐网络例句

As she looked at Warrington's manly face, and dark, melancholy eyes, she had settled in her mind that he must have been the victim of an unhappy attachment.

每逢看到沃林顿那刚毅的脸,那乌黑、忧郁的眼睛,她便会相信,他一定作过不幸的爱情的受害者。

Maybe they'll disappear into a pothole.

也许他们将在壶穴里消失

But because of its youthful corporate culture—most people are hustled out of the door in their mid-40s—it had no one to send.

但是因为该公司年轻的企业文化——大多数员工在40来岁的时候都被请出公司——一时间没有好的人选。