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源压力
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  source pressure
     The influences of system structural parameters such as source pressure, suit volume and valve angle were also discussed.
     给出了模型的一般型式 ,同时分析了气源压力、阀门安装角、抗荷服容积等系统结构参数对模型的影响。
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     Pressures in the cushion chambers, in inlet and outlet pipelines, cylinder displacement and shock acceleration were tested under different working conditions by tuning the source pressure and opening of the cushion needle valve. Typical air cushion characteristics including over cushioning, deficient cushioning and optimum cushioning were analysed.
     通过调节气源压力和缓冲针阀开度 ,测试不同工况下缓冲腔及主气路压力、气缸行程以及振动加速度等参数 ,并分析过缓冲、欠缓冲及最佳缓冲等几种典型的气缓冲特性 .
短句来源
  supply pressure
     The effects of growth temperature, group V supply pressure and CBr4 supply pressure on the composition, hole concentration and mobility of carbon-doped InGaAs epi-layer were studied.
     系统研究了生长温度、Ⅴ族束源压力和CBr_4压力对重掺碳InGaAs外延层组份、迁移率和空穴浓度的影响。
短句来源
     A fuzzy variable structure controller (FVSC) is designed on the basis of analyzing kinematics and dynamics of the parallel manipulator. The experiment shows that the maximum error is 0.3 mm. When the air supply pressure is changed, the error is still less than 0.6 mm.
     在对该新型3自由度并联机器人平台运动学和动力学特性理论分析的基础上,采用模糊变结构控制策略设计了新型3自由度并联机器人平台的两层滑模模糊变结构控制器,并建立了试验系统,开展了新型3自由度并联机器人平台的试验研究,其最大位置跟踪误差0.3 mm,当气源压力改变后,最大跟踪误差仍小于0.6 mm。
短句来源
     The results of experiment show that the steady-error is below ±0.2mm,and even though mass or supply pressure is varied the steady-error is within ±0.3mm. The effectiveness of the proposed control approach is demonstrated by experiment.
     实验表明所设计的气动人工肌肉位置控制系统稳态控制精度可达到±0.2 mm,在负载质量和气源压力改变的情况下,稳态位置控制精度仍可达到±0.3 mm,实验结果证明了所提出方法的有效性和系统的鲁棒性.
短句来源
     Simulation Research on the Self-adaptation Ability of Cushion System to Supply Pressure Fluctuation
     自适应缓冲系统对气源压力波动的自适应能力仿真研究
短句来源
     The system static and dynamic output characteristics under different control inputs were simulated and analyzed. The influences of four major factors including friction,load,supply pressure and working volume on system characteristics were studied.
     仿真分析了系统在不同输入控制量下的静、动态输出特性,并分别研究了摩擦力、负载、气源压力和工作容积4个主要因素对系统特性的影响.
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  “源压力”译为未确定词的双语例句
     The traditional PID,Fuzzy and the Fuzzy-PID controlling strategies were compared. Results show that Fuzzy-PID controller has the comprehensive advantage of Fuzzy and PID,and it is suitably used in the high precise air pressure source controlling system.
     通过试验比较了传统PID、Fuzzy控制和Fuzzy-PID双模控制3种控制策略,试验结果表明,Fuzzy-PID双模控制器综合了Fuzzy控制和PID控制的优点,适用于高精度气源压力控制系统.
短句来源
     Fuzzy-PID bi-mode controller was designed and applied to the high precise air pressure source controlling system.
     设计了Fuzzy-PID双模控制器并应用到高精度气源压力控制系统中.
短句来源
     A condition of PNI,injector model C3,gas pressure of 4 MPa and drug diameter of 90-125 μm,was carried out and the bioavailability of self-designed PNI system was 34.9% in compare of the result(33%) of foreign correspording product in some degree.
     采用C3型无针粉末注射器,气源压力为4 MPa,药物粒径为90~125μm的生物利用度为34.9%,与国外同类产品的药物导入效率(33%)相当。
短句来源
     The twotypes of PMA control system have stronger robustness, quicker tracking and higher accuracy. The steady-errors are below ±0.2mm and ±0.3mm respectively, and even though mass orsupply pressure is varied the steady-errors are within ±0.3mm and ±0.5mm respectively.
     两种型号的气动人工肌肉位置伺服系统的稳态位置控制精度分别可达到±0.2mm 和±0.3mm,即使在负载质量和气源压力改变的情况下,虽然稳态误差有所增加,但其稳态控制精度仍可达到±0.3mm 和±0.5mm,系统对于扰动和外部参数的变化具有强的鲁棒性。
短句来源
     The users have more requests to conveying quality and efficiency. So it becomes necessary to control the air pressure and flow system and the terminal pressure system.
     而用户对炭黑输送质量与输送效率的要求也日益提高,这就使得对气源压力、流量系统和终端压力系统这两个气力输送系统的子系统进行有效的控制变得非常必要。
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  source pressure
The fully developed condensation in CO2-H2O mixture was found to begin at a smaller total source pressure than in pure water vapour or carbon dioxide.
      
Recommendations are given concerning optimisation procedures of important parameters such as ion source pressure and temperature as well as electron energy.
      
Furthermore, the different GD source parameters like capillary distance, cathode-anode spacing, and GD source pressure with regards to the accessible elemental, structural, and molecular information were evaluated.
      
Diagnostic mass spectral fragment as well as molecular ion intensities were obtained by adjusting the ion source optics in the presence of ammonia at a lower source pressure than used conventionally.
      
By fitting isovolumic phases of an ejecting beat with a model-wave function, one can predict source pressure of the ejecting beat (Sunagawa et al.Trans Biomed Eng 1980; 27:299-305), this being a major determinant of systolic performance.
      
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  supply pressure
The ratio of the load pressure (pB) to the supply pressure (pA) of the HT varies from 0 to 1.2.
      
The visualization technique is demonstrated in a small reflected shock tunnel with a Mach 4 conical nozzle, nozzle supply pressure of 2.2?MPa and nozzle supply enthalpy of 1.8?MJ/kg.
      
The peak pressure in the cavity could be increased by raising the supply pressure, increasing the width of the pressure pulse, or by reducing the size of the pressure relief vent.
      
spray cone angle, spray solidity, breaking distance, and the droplet diameter) independent of each other by simultaneously varying the supply pressure of the liquid and the atomizing air flow rate.
      
An extensive investigation of the influence of the leakage flow through a labyrinth seal at supply pressure of 12?bar on the rotordynamics was performed by using numerical calculations and experimental measurements.
      
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In this paper the author primarily presents the design concept of CUQ-1 pneumatic tank level gauging and alarm system as well as the results in the test and application of this system. Stresses are imposed on the following: 1. Principles of the dynamic process of air bubble method for level gauging, showing the main factors which effect mea- suring accuracy. 2. Features of the blocked air constant flow control sy- stem and the air bubble chamber. 3. Determination of the flow rate and the pressure of the air...

In this paper the author primarily presents the design concept of CUQ-1 pneumatic tank level gauging and alarm system as well as the results in the test and application of this system. Stresses are imposed on the following: 1. Principles of the dynamic process of air bubble method for level gauging, showing the main factors which effect mea- suring accuracy. 2. Features of the blocked air constant flow control sy- stem and the air bubble chamber. 3. Determination of the flow rate and the pressure of the air source. 4. Way to reduce signal transmission error and the pipe- line arrangement. 5. Method to decrease the indication error and the design of the indicator. 6. Safety and the construction of the air-blowing device. 7. Simplified operation and the construction of the dual- function rotary valve. 8. Estimation of the highest tracing speed with the for- mular derived by the author. 9. Float-operated high and low level alarm system. 10. Pipelines and connections. Results and the characteristic curves obtained in the expe- riment for the principles of CUQ-1 system are introduced in the paper, it is proved that the principles are reasonable and this system is accurate in gauging, fast in tracing, having high repetitive measuring precision and low air consumption. Fur- thermore, the effect of the pipeline length on flowing resi stance and its variation in gauging process are examined. In conclusion, the advantages of this system are analyse- sed and the main characteristics of some typical systems are listed for comparison.

本文着重介绍CUQ-1型油轮油位气动遥测与警报系统的设计思想、试验结身和使用效果。着重说明: 1.气泡法油位测量动态过程原理,指出影响精度的主要因素。 2.闭塞恒流控制系统的特点和气泡器。 3.测量空气流量与气源压力的确定。 4.减少信号传递误差的方法和管路布置方式。 5.减少指示误差与指示器的设计。 6.安全性与吹气装置结构。 7.简化操作与双联控制转阀结构。 8.根据作者提出的公式计算测量系统的最大跟踪速度。 9.气动式满仓与卸空报警系统。 10.管路与接头。文中介绍了CUQ-1系统实船原理性试验结果和试验曲线,证明原理可行,测量精确,跟踪敏捷,重复性好,空气流量小,并查明管路长度对流动阻力的影响及该值在测量过程中的变化。最后说明CUQ-1型系统的优点,列出了各典型系统的主要特性比较表。

Objective.Hydraulic design for the three-way valve controlled cylider is nowadays based on the prerequisite that the null controlling piston pressure is given just as the half of supply pressure.But it is not always the case in practice,e.g.,the hydraulic servo for lifting electrodes in an are furnace.In such a case.as a result caused by various factors the null controlling pressure pc is not really equal to the half of supply pressure ps,and so the gain in a direction is not identical with that in reverse.This...

Objective.Hydraulic design for the three-way valve controlled cylider is nowadays based on the prerequisite that the null controlling piston pressure is given just as the half of supply pressure.But it is not always the case in practice,e.g.,the hydraulic servo for lifting electrodes in an are furnace.In such a case.as a result caused by various factors the null controlling pressure pc is not really equal to the half of supply pressure ps,and so the gain in a direction is not identical with that in reverse.This paper gives an analysis of performance characteristic to such a sort of cylinder system and discusses the stability concerned.For the cylinder system controlled by a three-way valve,different gains in opposite directions due to varied loading lead to a conversion of linear system into nonlinear(shown as in Fig.2).Expressions are derived as follows:where coefficient k=pc/ps,kq the valve flow gain when k-0.5,kq and kq2 the real valve flow gains in opposite flow directions respectively.Having analyzed the describing function GD in connection with coefficient k(GD=kq when k=0.5,Fig.3),it is found that Nyquist contour may be used to determine the stability of the system including a part of nonlinear gains which are unequal in opposite directions.The system will be unstableif the point(-2 (1+k+k),j0) is enclosed in Nyquist contour,or the point (-1,j0) is enclosed in such a Nyguist contour which is drawn on the basis of multiplying the transfer function of linear partG(s) by (1-k+k)2,The transient response charactersitic cal -culated by computer shows that the overshoot decreases so long as the coefficient k increases and no oscillation will occurs with transient res- ponse when k increased to a certain degree.Fig.1 Three-way valve controlled cylinderFig.2 Characteristic curve of valve flow gains in opposite flow directionsFig.3 Relationship between GO and kFig.4 Three-way valve controlled cylinder systemFig.5 Block diagram of three-way valve controlled cylinder systemFig.6 Nyquist contourFig.7 Step response No.1Fig.8 Step response No.2Fig.9 Step response No.3Fig.10 Step response No.4Fig.11 Step response No.5Fig.12 Step response No.6

目前对零开口三通阀控油缸系统的分析都是建立在零位控制压力等于1/2油源压力的基础上的。而在实际系统中往往并非如此,本文揭示出在这种系统中存在着正反向流量增益不等的非线性环节。并用描述函数的分析方法找出了闭环稳定性的新判据。还给出用电子计算机数字仿真的方法进行计算的实例。

Pipes,fittings,seals,filters;and other accessories used in hydraulic systems must

为了提高液压元件的可靠性,管件、管接头、密封件、滤油器等在标准化试验项目中须满足规定的脉冲试验考核的要求,它要进行20万次由零压起始到1.5倍额定压力周期性的瞬时压力的冲击。但由于液压技术的发展,液压元件的额定使用压力日益提高,采用非增压式蓄能器型脉冲试验装置试验在性能指标上达不到要求。如果采取提高液压源压力的方法,但按目前的技术水平,解决压力大于320巴甚至600巴的高压液压元件尚有困难,因此采用增压器增大被试件处压力的方法,但脉冲波形仍要达到标准化规定的要求。

 
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