Introduction was made to the method of sine pulse width modulation (SPWM) wave generated by table searching, which is based on area equivalence principle.
介绍了一种基于面积等效原理，采用查表法产生正弦脉宽调制(SPWM)波的方法。
This paper gets the frequency stability of a sine wave using a digital method.
本文实现了利用数字方法计算正弦波的频率稳定度。
A new control method of multiunit inverter is described, which determines the triggering pulse for each unit to obtain the sine wave output through multiple-phase shifting superimposition principle.
研究了多重化逆变器的一种控制方法，采用逆推的方法确定各单元的触发脉冲，通过多重移相叠加原理得到正弦波输出。
Sine wave scanning method and pulse excitation method-common methods for the test of rubber absorbers are studied emphatically.
本文重点讨论了曲轴橡胶减振器测试中常用的正弦扫描法和脉冲激励法。
The experimental results prove that the sine wave inverter designed by this method have good stability and high quality output voltage and can be applied in practice.
实验结果表明，利用该方法设计的无差拍控制正弦波逆变器系统稳定性好、输出电压波形畸变率低，具有一定的实际应用价值。
By designing TDA7490 sine wave inverter power supply, we educed a method to design an inverter power supply with low distortion by using class-D on-off audio part.
通过对TDA7490的正弦逆变电源运用设计，尝试出一种利用D类开关音频器件设计低失真逆变电源的方法。
The sine wave inspection method is limited by condition, does not have the sine-wave-generator or the frequency is not precise, is not easy to realize.
正弦波检查法因条件所限，无正弦波发生器或频率不准，不易实现。
A four-parameter sine wave curve-fit method is intro - duced, which is based on the three-parameter sine wave curve-fit method and its an absolute convergent course.
介绍一种用三参数正弦波拟合算法实现的、绝对收敛的四参数最小二乘正弦波拟合算法，给出了其收敛区间、绝对收敛判据以及实现过程。
The limit of this method is that the sine wave generator with high performance is necessary, especially the stability, the noise and distortion of generator.
其局限性则是对交流信号源要求较高，要求高稳定性、低噪声及低失真度；
As the natural sampling method generating SPWM pulses closer to sine wave is impractical in real-time control, the regular sampling method with poor precision is usually adopted in practical projects.
自然采样法产生的SPWM脉冲效果最接近正弦波，但工程中不利于实时控制，在实际中常采用的规则采样法精度不够高。
The triggering Angle modulation method of the sine-wave cyclo-converter is carried out, and the operating wave form of the designed system is put forward.
讨论了正弦波输出的交—交变频器触发角的控制方案，实现了双微机控制的交—交变频器的低频控制，给出了实际运行波形。
The uncertainty of evaluation results of delay between channels of linear measurement system by using the least mean square four-parameter sine-wave curve-fit method is described.
介绍了用正弦波拟合法评价测量系统通道间延迟时间差不确定度的分析和评定过程。
The uncertainty of evaluation results of delay between channels of linear measurement system by using the least mean square four-parameter sine-wave curve-fit method is described.
介绍了用正弦波拟合法评价测量系统通道间延迟时间差不确定度的分析和评定过程。
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