脉动系数

mài dònɡ xì shù
  • ripple factor;ripple ratio
脉动系数脉动系数
  1. 仿真实验中,转矩脉动系数从补偿前的0.6730降低到补偿后的0.2574,证明了该方法的可行性和有效性,为实际SRM控制系统的设计和调试提供了有效的手段和工具。

    During the course of simulation , the torque ripple coefficient is depressed from 0.673 0 without compensation to 0.257 4 with compensation , the feasibility and validity are testified by simulation results . This simulation offers a valid tool for designing and debugging actual SRM control system .

  2. 轴向柱塞泵实际流量及脉动系数的理论研究

    Research on Actual Flow and Pulsation of the Axial Piston Pumps

  3. 通过对轴向柱塞泵的基本性能分析,推导出了流量、脉动系数、流量脉动频率计算公式。

    A basic performance analysis for an axial plunger pump is conducted .

  4. 本系统控制精度高、稳定性好、输出直流高压的脉动系数小、抗干扰性强。

    This system have sensitive control high stability , little output HV DC undulation , high anti-interference .

  5. 采用二阶式水位控制系统可使流量的脉动系数小于0.5%。

    Using a two-stage water-level control system , the instability of flow rate is limited to 0.5 % .

  6. 此外,偶数柱塞泵的实际流量脉动系数要大于与之相邻的奇数柱塞泵的实际流量脉动系数。

    In addition , the flow fluctuation coefficients of the discussed piston pump with even plunger is larger than that of piston pump with adjacent odd plunger .

  7. 同时指出流量脉动系数最大的影响因素是油液的弹性模量和油泵的工作压力,其次是柱塞数。

    Maximum influencing factors of flow fluctuation coefficient are the elastic modulus of the oil and the working pressure of the pumps , the piston number being a minor factor .

  8. 仿真结果表明,相邻值的奇偶数柱塞泵的流量脉动系数相差无几,且流量脉动频率与柱塞数的奇偶性无关。

    The simulating result shows that there is little difference in the flow coefficient between the adjacent odd and even piston pumps , and the flow pulsation frequency is independent from odd or even number of pistons .

  9. 求得轴向柱塞泵瞬时流量脉动系数比工作介质不可压缩时大一个数量级,且与柱塞数的奇偶性无关。

    It is found that the flow fluctuation coefficient of the pumps is one magnitude order higher than that when the fluid compressibility is neglected and , moreover , it is not affected by the parity of piston number .

  10. 对在干扰状态下得到的数据以误差方法进行了分析及处理,得到了涡街流量计的流量修正系数与脉动系数之间的关系。

    Using the error method to analyze and process the experimental data , the relationship between flow modification coefficient and pulsating coefficient was obtained , thus a foundation for applying vortex flowmeter in diesel pulsating flow measurement and control was established .

  11. 根据电磁场理论对直线感应电动机纵向边端效应进行分析,导出了气隙磁场脉动系数、气隙磁场增大系数和纵向等效漏磁长度等的计算公式,并提出了削弱和消除脉动磁场的方法。

    This paper analyses the static longitudinal end effect of the linear induction motor according to electromagnetic field theory , and presents the calculating formulas of the air gap magnetic field pulsating coefficient , the magnetic-flux density increasing coefficient and the longitudinal equivalent magnetic leakage length .

  12. 给出了受控高层钢结构脉动增大系数及有关TMD系统参数实用设计表格。给出了高层结构-TMD系统风振舒适度控制设计过程。

    The applicable design table for fluctuating amplifying coefficients and the TMD parameters of the controlled tall steel structures as well as the control design steps for tall steel structure_TMD system are given .

  13. 结果表明,结构阻尼比增大,风振脉动增大系数明显减小。

    The results showed that the fluctuating amplifying coefficient evidently reduces with the increase of damping ratio .

  14. 给出了受控结构脉动增大系数设计表格和控制设计步骤。

    The design table for fluctuating amplifying coefficient and the control design steps of the controlled structure are given .

  15. 单股和双股射流塘底脉动压强系数与近壁紊流强度的关系可用对数曲线表述。

    The relationship of the fluctuating pressure coefficient on wall and the turbulent intensity near the wall can be described with logarithmic curve .

  16. 八边形、四边形及六边形桅杆平均压力系数及脉动压力系数沿桅杆高度方向呈均匀分布,不随桅杆高度的变化而变化。

    The Average pressure coefficient and fluctuating pressure coefficient of quadrilateral , hexagon , octagon section meta-synthetic mast distribute homogeneously along height direction of the masts .

  17. 试验得到了具有典型倾角的拉索在不同风向角下,拉索模型上的平均风压和脉动风压系数,以及气动力系数。

    Mean and fluctuating pressures and aerodynamic force coefficients on the cable model and the artificial rivulet are obtained under the conditions of typical cable inclined angles and wind angles .

  18. 脉动升力系数先随含气率的增大而缓慢增加,在含气率增大到0.1后增大得较快。

    The oscillating lift coefficient increases with the growth of the void fraction in such a way that it increases slowly before the void fraction up to 0.1 and after that , increases faster .

  19. 测量了断面表面压力分布,分析了雷诺数对表面压力系数影响、对脉动压力系数影响、对最小压力系数影响。

    The surface pressure of the model was measured with different Reynolds number ; the paper reveals Reynolds number influence on surface pressure coefficient , on the fluctuating pressure coefficient and the minimum pressure coefficient . 3 .

  20. 实验结果表明:波状圆柱与普通圆柱相比其脉动升力系数较小,具有减小流体诱导振动的作用;

    It is concluded that the root-mean-square ( RMS ) fluctuating lift coefficients of the wavy cylinders are much lower than those of right cylinders , which means a good effect of wavy cylinder on the suppression of flow-induced vibration .

  21. 基于风振响应,研究四类平屋盖的多目标等效静风荷载,将其分为平均风压系数和等效静风荷载脉动风压系数两部分。

    Finally , the practically specific criteria of the flat roof structure are summarized . ( 3 ) On the basis of wind-induced response , the multiple equivalent objectives are divided into mean wind pressure coefficient and the equivalent static wind load fluctuating pressure coefficient .

  22. 对方形、矩形、三角形及Y型等10个典型的超高层建筑模型进行了细致的风洞试验,获得了模型表面的平均风压和脉动风压系数。

    10 typical super-tall building models of different cross-section shapes , such as square , rectangular , triangular and Y-type cross-section shapes , and aspect ratios and side ratios are tested in a wind tunnel , and the mean and fluctuating wind pressure coefficients are thus obtained .

  23. 实验结果表明,柱的振动不仅影到脉动升力系数和稳态阻力系数,而且还能改变两柱之间的相互干扰作用。

    The Reynolds numbers are in the range of 4.5 × 104 to 5 . 8 × 105 . The results show that the cylinders ' vibration not only affects the steady drag and fluctuating lift coefficients , but also can change the interference between the two cylinders .

  24. 给出了侧墙和底板脉动压力强度系数K的表达式;

    The expression of pressure fluctuation intensity coefficient K was given .

  25. 压强强度系数、脉动压强极差系数与含沙量、掺气浓度的关系。

    The effects of air concentration and sediment content on the amplitude and frequency of pressure fluctuations are discussed .

  26. 考虑到不确定性参数波动(如负载转矩脉动、摩擦系数变化)的影响,本文运用递归式李亚普洛夫设计方法构造了一个鲁棒转速控制器。

    Considering the effect of uncertain parameter perturbation , e. g. load fluctuation and friction parameters , a method of Lyapunov-based recursive design was applied to construct a robust rotational velocity controller .

  27. 根据日本规范中提出的横风向脉动风力谱系数函数,利用人工模拟横风向脉动风压时程的方法,提出了一个矩形高层建筑横风向风振反应时程的计算方法供参考。

    A method for evaluating wind induced vibration in the across wind direction on rectangle high rise buildings has been presented in this paper with simulation of the process of wind pressure fluctuation .

  28. 在脉动区,传质系数随着气速、液速的提高而提高。

    In pulsing flow regime , liquid-solid mass transfer coefficients are enhanced with the increasing gas and liquid flow rates .

  29. 以及脉动与否对换热系数的影响。为衡量转矩脉动,定义了转矩脉动系数;

    The effect of pulsating on heat transfer was also measured . To express the torque ripple , the coefficient of the torque ripple is defined .

  30. 为衡量转矩脉动,定义了转矩脉动系数;

    To express the torque ripple , the coefficient of the torque ripple is defined .