This paper calculate inherent frequency of the free vibration of the cylinder shell with the theory of the separated variable method on the basis of displacement model.
以位移模型为基础，用有限元中的分离变量法的理论，求解了圆柱壳自由振动的固有频率，计算结果与壳体解析解相一致。
Considering this, this paper presents a method by experiment which can measure performance curve of silicon steel sheet at different frequency as reference of designing variable frequency motor.
针对这种情况，本文提出一种实验的方法，测取不同频率下硅钢片的特性曲线，以供变频电机设计时参考。
A design procedure with constant parameter frequency method is developed for the temperature control system with variable parameter applicable especially to thermodynamics.
提出了热工专业中特殊的变参数控制系统的定参数频率设计法，应用计算机进行了仿真计算并进行了实际系统的测试。
This paper introduces how to measure output of the inverter by simulating quantity of it, and the method for calculating the efficiency of variable-frequency motor.
本文介绍了如何通过变频器的模拟量输出来测量变频器的输出功率，进而计算出变频电动机效率的方法。
This paper introduces the control method for the Wind Turbine Units of constant speed constant frequency and variable speed constant frequency.
文章介绍了恒速恒频及变速恒频并网型风力发电机组的控制方法。
The optimization theory and method combined with variable frequency speed regulation technology is applied in this paper to realize efficiency optimization in water injection pumping stations.
利用最优化原理与方法结合变频调速技术实现注水泵站效率优化控制，以满足油田生产节能降耗的需要。
Method of. modeling using the intelligent optimization algorithms is discussed for AC variable frequency speed regulation system.
针对交流变频调速系统，探讨了应用智能优化算法实验建模方法。
Simultaneously, it provides the method to determine the best pressure of header system and optimum frequency of variable frequency pump based on the special working condition.
同时，给出了在特定工况下，确定最佳母管压力和变频泵最佳频率的方法。
The frequency performances and dc-offset rejection abilities of several typical variable-window algorithms are evaluated and compared based on the frequency-response analysis method.
采用频率响应特性分析方法，对典型变数据窗阻抗算法的频域特性以及滤除非周期分量的能力进行了综合比较和分析。
The result of analysis and experiment show that the proposed method can be applied in the AC variable frequency speed control system which is nonlinear, fast changefully and difficult to be modeled.
理论分析与实验的结果表明：该方法对异步电机变频调速这一非线性、快速多变、难于建模复杂系统的控制是实用和有效的。
The method starts with the theoretically minimum frequency and searches for the minimum valid sampling frequency using variable step sizes subject to three non-aliasing constraints.
该方法从理论上可能的最小采样频率出发，根据采样后频谱不发生混叠的3种约束条件来确定可变的频率步长，搜索可用的最小频率。
Based on the new ANN (artificial neural network) inverse system control method, the AC variable frequency speed control system is analyzed and experimented.
本文运用神经网络逆系统这一新的控制策略，对异步电机变频调速系统进行可逆分析与控制试验。
The paper presents the multi-variable least square method to determine the optimal factor of data smoothing and its amplitude-frequency characteristics and compares it with the general filter.
本文提出了一种利用多变量最小二乘法确定最佳数据平滑因子的方法，建立了优化平滑器特性的数学模型。
It found that the method is able to analyze diagnostic characteristics of the variable frequency speed regulation system with asynchronous motor.
实践证明，该方法可以有效地分析变频调速异步电机故障。
This paper discusses the method that is applied in SPWM variable frequency system based on editable DSP controller.
阐述了一种以可编程DSP控制器为核心的应用于变频系统中正弦脉宽调制（SPWM）方法的实现。
In this paper, the authors investigated the method to improve the variable frequency resistance of enamel by a composite nano-powder.
本文研究了纳米复合粉体提高漆包线绝缘漆耐变频性能的方法。
A dual frequency measurement method with variable precision was used to measure object shapes with sudden surface changes.
为准确测量物体的突变形面，通常采用一种双频变精度方法。
It also gives energy consumption analysis caused by the variable frequency control method.
对变频控制进行了能耗分析。
Based on the basic equation of A. C. exciting alternator, the vector chart and power flow chart of the alternator are studied, and a method of variable-speed and constant frequency (VSCF) is proposed.
从交流励磁发电机的基本方程出发，通过对其矢量图和功率流程的研究，提出了变速恒频的实现方法。
Based on specific demand in machining process, a constant line speed control method is proposed, which is used in variable frequency speed control system.
针对数控机床工件恒线速加工时的特殊要求，提出了一种应用于变频调速系统的恒线速控制方法。
The principle and control method was introduced, and a design sample of hardware and software applied on variable frequency system was given in this paper.
在介绍其原理与控制方法的同时，并给出了在变频调速中应用的硬、软件设计实例。
The invention relates to a variable frequency control method of an AC transducer.
本发明涉及一种交流变频器的变频控制方法。
The invention relates to a variable frequency control method of an AC transducer.
本发明涉及一种交流变频器的变频控制方法。
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