查询词典 instantaneous angular velocity
- 与 instantaneous angular velocity 相关的网络例句 [注:此内容来源于网络,仅供参考]
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By using this method, the angular frequency, amplitude, initial phase angle, decay constant of each component in transient voltage and/or current waveforms can be precisely extracted. Also, all other kinds of transient procedure can be analyzed by this method. Thirdly, a new definition of generalized instantaneous reactive power and generalized instantaneous reactive current in dq0 coordinates under any nonsinusoidal and unbalanced three-phase circuit is proposed for the first time. The detection and compensation method for different instantaneous reactive currents are also concerned.
本文首先提出了用于快速高精度频谱分析的一种改进快速傅立叶变换方法,该法具有速度快、精度高、抗混迭、不受采样定理约束、可以分析出谐次大于N/2的频谱系数等特点,可方便地应用于电力系统谐波分析及其它各类频谱分析;然后提出了基于非线性最小二乘优化法的电力系统暂态波形分析方法,可准确求出电力系统暂态电压、电流波形中各个分量的角频率、幅值、初相角及衰减常数,并可广泛应用于各类暂态过程波形分析。
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Based on this equation, the calculation formular of the walking beam's swing angular displacement, angular velocity, angular accelaration and the distance, velocity, accelaration in the hanging point movement are obtained.
以兰通产CYJ2.726B型抽油机为例进行了计算,并在0°~360°曲柄转角范围内绘制了悬点运动速度和加速度的变化曲线,从而给出了游梁式抽油机悬点运动参数计算的一种方法。
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Based on the theory of dynamics and motion, the model for simulating the instantaneous angular speed in diesel engine is presented. The calculating software is developed with LabVIEW, the instantaneous angular speed is calculated and analyzed.
根据柴油机的动力学和运动学,建立了柴油机瞬时转速的计算模型,在LabVIEW软件开发平台上开发了仿真计算软件,进行了柴油机瞬时转速的仿真计算与分析。
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The instantaneous angular speed based on the flexible body model underdiffierent faults simulated is calculated, which shows the rule of the instantaneousangular speed fluctuation ratio due to the underpower of a single cylinder. Therefore,the maximum power fluctuation ratio of the instantaneous angular speed is proposed to diagnose the fault of single cylinders underpower.
2进行了基于柔性体模型的柴油机瞬时转速故障仿真计算,揭示了柴油机单缸功率不足的瞬时转速波动规律,提出了采用最大瞬时转速波动率作功峰值的无量纲参数诊断柴油机单缸功率不足故障,并定位到故障缸的瞬时转速诊断新方法,并在船舶柴油机上得到应用。
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Based on the numeric monitoring and diagnosis system for 6L16/24 typemarine diesel engine, the instantaneous angular speed and the cylinder pressure areapplied to the monitoring and diagnosing of the marine diesel engine through theartificial faults experiments in laboratory. The experiments results show that theintegrated motheds both the instantaneous angular speed and the cylinder pressurecan effectively diagnose the underpower fault of single cylinder, and detects whichcylinder occurs.
5利用船舶柴油机数字化监测诊断系统平台,进行了船舶柴油机瞬时转速和示功图法监测诊断的故障模拟试验研究,研究结果表明:瞬时转速法和示功图法可有效诊断柴油机单缸功率不足的故障,并可定位到故障缸。
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The lift-off angle of saltating sand grain follows LogNorm4 function distribution; lift-off horizontal velocity, vertical velocity and resultant velocity of saltating sand grain and falling angle and vertical velocity of saltating sand grain follow Gamma function distribution; falling horizontal velocity and resultant velocity of saltating sand grain follow Pearson IV function distribution.
跃移沙粒起跳、降落速度分布函数利用风洞实验获得的沙粒跃移运动的片断轨迹,反推出沙粒起跳角度服从LogNorm4函数分布,跃移沙粒起跳水平、垂直及合成速度均服从Gamma函数分布。
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And the concept of angular dispersion of diffractive polar angle(the first kind angular dispersion) and angular dispersion of diffractive azimuthal angle (the second kind angular dispersion) are established.
确立了二维平面光栅衍射极角角色散和衍射方位角角色散的概念。
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The effect of tribology factors on bearing vibration is studied experimentally. AR model and WPT are used to processing the normal arid abnormal signals. The results are as follows:1. The vibration of ball bearings is caused by the tribology action of contact pairs of ball and ring races and has the essential of tribo-dynamics. Any factors affecting the tribology characteristics of contact pairs will affect vibration and noise of bearings consequently.2. Vibration characteristics of bearing keep almostly unchanged with the increasing of axial load expecting the increasing of nature frequencies. When radial load increasing with axial load unchanged, nature frequencies keep unchanged but some new vibration peaks appears in the spectrum.3. Vibration amplitudes are damped and nature frequency are enhanced with sufficient lubrication. Vibration and noise of bearings increase obviously and roar can happen and the contact surfaces scratch slightly under insufficient and unclean lubrication state. Bearing will be disabled in a few minutes without any lubrication.4. Bearing vibration is unstable under low speed. With the speed increasing, the vibration become stable and natural frequencies increase slightly but the amplitudes increase apparently.5. Bearing vibration can be excited only by some harmonics ofwaviness without lubrication and by all harmonics with lubrication based on the theoretical analysis.6. The nature frequencies of ball bearings decrease with the increasing sizes. When international clearance increasing, nature frequencies decrease in radial and increase in axial and angular and the amplitudes increase in radial and decrease in axial and angular. When the number of balls increasing, nature frequencies increase and amplitudes decrease. When the pitch diameter increasing, axial nature frequency increase and others nearly keep no change. When outer race groove curvature radius increasing, nature frequencies increase in radial and decrease in axial and angular and amplitudes keep no change in radial and increase in axial and angular. When inner race groove curvature radius increasing, nature frequencies decrease and amplitudes increase.7. The distortion in amplitude and frequency components of bearing vibration signals picked up by the present probe measurement method is founded and right conclusions cannot be achieved by the signals. When accelerometer is rigidly screwed with steel stud onto a flat outer surface of a ball bearing, vibration signal can be got without distortion and the reliability of research on bearing vibration is assured.8. AR model is suitable for large samples of bearing vibration signals, square root of length of samples can be used as the upper limitation of order determination and the FPE order selection criterion is effective. Many advantages of AR spectrum are founded over the classical based on FFT.9. Time-Frequency analysis is necessary for abnormal noise of ball bearings. WPT overcomes the principle shortcomings of STFT and proved to be a best tool to process the abnormal signals.
理论分析和试验研究表明: 1球轴承振动是钢球—滚道接触副中的各种摩擦学作用引起的,具有摩擦动力学的本质,任何对接触副的摩擦学特性有影响的因素都将对球轴承的振动和噪声特性产生影响; 2中心轴向载荷作用下,载荷增大使球轴承的固有振动频率升高,载荷越大同样的载荷增幅引起的频率升幅减小,足够大的中心轴向载荷作用下载荷的变化对球轴承振动的频率特性不会产生明显的影响; 3轴向和径向联合载荷作用下,径向载荷不大时球轴承振动的固有频率基本不变,但是可能引起变刚度激励的非线性振动,出现新的频峰,过大的径向载荷将使部分钢球脱离接触,使球轴承的振动和噪声呈现不稳定状态; 4润滑对球轴承的振动和噪声特性有重要的影响,良好的润滑对振动有明显的抑制作用,润滑不充分时,振动和噪声的水平会有明显增高,一定条件下还会激发接触副中的谐振,发出啸声,造成接触表面的伤害,无润滑干接触时,短时的运转就会损伤接触副表面,使振动和噪声迅速增大,并随时可能引发严重的磨损和卡滞失效;接触副润滑良好时,油膜的"刚化效应"使球轴承振动的固有频率有所提高,润滑剂中含有弥散性污浊时,振动的幅度总体升高,但弥散性污浊不会改变球轴承振动的频率特性;浙江大学博士学位论文:球轴承振动的研究 5低速时,球轴承振动的基本特征呈现不稳定状态,随着转速的提高,球轴承振动的频率特性趋于稳定,固有频率频峰升高; 6理论分析表明,干接触时钢球和滚道表面波纹度的某些谐波分量能激励球轴承的振动,振动的幅值与谐波幅值成正比,实际球轴承中钢球的分布不可能完全均匀,波纹度的激励作用会随时发生;润滑接触的分析表明,波纹度的任意谐波分量均能激励球轴承的振动; 7球轴承的几何和结构参数分析表明,球轴承尺寸越大,径向、轴向和角振动的固有频率越低;钢球中心圆直径增大,球轴承的径向和轴向振动的固有频率基本不变,角振动的固有频率有所上升,振动的幅频特性基本不变;径向游隙加大使球轴承的径向振动固有频率降低,轴向和角振动的固有频率有所升高,径向振动幅频特性的幅值升高,而轴向和角向降低;钢球的数量增多使球轴承振动的固有频率上升,幅频特性的幅值下降,径向振动的幅值下降最为明显;外圈沟曲率半径系数增大使球轴承径向振动的固有频率升高,轴向和角振动的固有频率降低,径向幅频特性基本不变,轴向和角向幅频特性幅值升高;内圈沟曲率半径系数增大使径向、轴向和角振动固有频率均下降,振动幅频特性的幅值均有升高; 8试验对比表明,传感器采用探针式安装时,由于探针接触副接触特性的影响,钡(量得到的球轴承振动信号有失真,采用专门设计和制作的试验球轴承,以固定式安装加速度计,首次测量得到了球轴承振动的真实信号,通过对振动信号的分析,验证了球轴承振动的理论模型; 9)基于时间序列分析的AR模型适用于大样本球轴承振动信号的分析,以样本长度的均方根值作定阶上界,FPE做判阶准则,给出的AR谱光滑,频率分辨率高,是球轴承振动分析的简便而可靠的手段; 10以时频域分析的小波包变换分析球轴承异音信号能够比较好地定位和聚焦异音发生的时间,时间间隔,频率范围,同样是球轴承振动分析的可靠的手段,可用作球轴承故障诊断技术。
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Based on characteristic of chinese handwritten signature, some programs are developed to acquire the dynamic handwritten signature data from WACOM Tablet and to calculate velocities from acquired dynamic data. Based on statistics theory, instantaneous velocity and average X velocity and average Y velocity and time when the first maximal velocity arriving during on-line handwritten signa...
根据汉字手写签名的特点,编程从手写板获取签名的动态数据,编写了提取手写签名多种速度特征值的程序,在统计的基础上,对手写签名过程中的瞬时速度、X轴向平均速度和Y轴向平均速度、最大速度出现的位置、极大速度首次出现的位置等特征量的稳定性进行了实验研究,得出了一些有用的结论。
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B Angular momentum is a vector quantity as are also angular velocity, angular acceleration and torque.
角动量是个矢量,角速度和角加速和转矩也都是矢量。
- 相关中文对照歌词
- Terminal Velocity
- Crucial Velocity
- Velocity Bird
- Next Stop, Atro City
- Velocity Girl
- Habeus
- Our Velocity
- Speed And Velocity
- Nighttime
- I Am Electric
- 推荐网络例句
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As of Tuesday, Google's results were still censored in China.
截至周二,谷歌的搜索结果仍受中国审查。
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In order to make the positive action increase and negative one decrease, the sub-forces of the social factors must be adjusted to form a centripetal force.
在这一过程中,人的主体性发挥是社会有机体健康发展的灵魂。
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Objective To investigate the relationship between the telomer ase activity and apoptosis in gastric cancer.
目的为了探讨胃癌组织中端粒酶与细胞凋亡的关系。