Computor emulation of PWM modulation wave applicable to MATLAB language 用MATLAB语言对PWM调制波的计算机仿真
Demodulation of Balance Amplitude Modulation Wave 平衡调幅波的解调
The Al/ Pb metallic multilayer of different modulation wave and periods was prepared by direct current sputtering. 通过直流二极溅射法制备了具有不同调制波长和周期的Al/Pb金属多层膜。
By method of illustration, we introduce envelope demodulating instead of multiplying demodulating for balance amplitude modulation wave. 用作图法阐明如何用包络检波替代乘法解调,实现对平衡调幅波的解调。
So for the improvement of transmition velocity, we must analyze the characteristics of noise signal and the model of line deeply and then take some useful measures to better the immunity of modulation wave. 因此,必须认真分析线路的噪声信号的特性以及噪声线路的模型,以便在编码方式和调制方式中针对性的做一些改进措施以改善调制波形的抗干扰能力,使得传输速率能够进一步提高。
A computer-aided analysis and demonstration of the spectrum of frequency modulation wave 调频波频谱的计算机辅助分析与演示
Research on the method of Identification Signal Between Beat Wave and Amplitude Modulation Wave Based on Fractal Theory 基于分形理论的拍波与调幅波信号识别方法研究
All kinds of amplitude modulation capability if one signal is carrier wave and the other is modulation wave; 如果把其中一路作为载波信号,另一路作为调制波,就能实现各种各样的调幅波;
Discussing PID algorithm and forming method of the pulse width modulation wave as well as their application in the system. 讨论了PID算法和脉宽调制波的产生方法以及在本系统中的应用。
An Analysis of the Detective Performance of the Pulse Frequency Modulation Wave 脉冲调频波探测性能分析
The analysis of modulation wave theory has very important theoretical and actual meaning for studying non sine alternating current. 谐波理论分析对于非正弦交流电路的研究具有重要的理论和实际意义。
A method for generating three-phase sine pulse width modulation wave 一种三相正弦脉宽调制波的产生方法
Research on phase noise of the frequency modulation wave 调频波相位噪声测量的探讨
A sinusoidal was used as a bias phase modulation wave and the open loop demodulation used the weak signal detection technique. 在方案中,以正弦波信号作为相位偏置信号,相位解调运用了同步相关检测的方法。
This paper introduces mainly phase noise and its spectrum characters in pulse modulation wave, and promotes a new measurement system about phase noise using Digital PLL ( Phase Locked Loop). 本文着重分析了脉冲调制波的相位噪声及其功率谱,提出了一种利用数字锁相环测试相位噪声的实现技术方案。
A novel single-phase inverter source based on modulation wave reconstuction technology is proposed. 提出了一种基于调制波重构技术新型的单相逆变电源。
The generation of modulation wave by wide band multiplier is designed after deep discussion on theory of the modulation wave generation. 在深入探讨调制波的产生原理基础上,设计了一个基于乘法器的调制波发生电路。
In the paper, the expression method of the frequency stability of the pulse modulation wave was expounded. 本文主要阐述了脉冲调制信号频率稳定度的时,频域表征方法,指出脉冲调制波频稳宜用相对单边功率谱表征,而不宜用阿仑方差表征;
A novel three-phase uncontrollable rectifier inverter without or with a quite small dc-link capacitor, accordingly, a novel reconstruction technology, Modulation Wave Reconstruction Sine Pulse Width Modulation ( MWR-SPWM) which can greatly eliminate harmonics in inverter ′ s output voltage are proposed. 提出了一种新型三相不带或带有很小直流连接电容的逆变器,介绍了仅通过改变相应的调制波来消除逆变器输出电压谐波的重构SPWM技术。
By replacing the sinusoidal modulation wave with its tangent or secant, three novel tangent sampling methods and two secant sampling methods were gained. 并在此基础上,分别利用切线和割线来近似替代正弦调制波,获得了3种新的切线采样法和2种割线采样法。
Also, optimized SAPWM modulation wave has been utilized, improving the utility ratio of DC voltage and restraining effectively the output harmonic current of inverter. 并采用优化的SAPWM调制信号,提高了直流电压的利用率,并能有效地抑制逆变器输出的谐波电流。
The Generation of the Pulse Width Modulation Wave in the System of Frequency Conversion and Speed Governor 变频调速系统中脉宽调制波的产生
First analysis of the overall structure of the module, and then the module is divided into the modulation wave generator module, triangular carrier module, module, and the dead zone modules. 首先分析模块的整体结构,进而将模块分成调制波发生器模块、三角载波模块、比较器模块和死区模块。
And its modulation principle is analyzed.? On the basis of double Fourier analyzing three-phase three-level cascaded inverter output line voltage, the best values of trapezoidal modulation wave is obtained. 分析了该调制法的调制原理,并在对三相三电平级联型逆变器输出线电压进行双重傅里叶分析的基础上,得出了最佳梯形调制波的取值。
After using the storage capacitor to replace DC power supply, ideal output voltage of the five-level structure is produced. The simulation results show that the output wave have the same frequency with modulation wave. 4. 仿真结果表明,逆变器使用储能电容取代独立直流电源后,其输出电压能产生较为理想的五电平结构,且其频率与调制波频率相同。
The modulation wave mainly use three harmonic injected PWM and voltage space vector SVPWM, and elaborate its principle and realizing method. 调制波主要采用三次谐波注入PWM和电压空间矢量SVPWM,并详细阐述了其原理与实现方法。
Firstly, this article analyses the function expression of the modulation wave in theory; then researches the three elements 'expressions on the Circuit signal; finally, combining the signal expression of the three elements, fit out the modulation wave by the resistor network. 本文先理论分析了调制波的函数表达式,接着研究了三要素量在电路上的信号体现方式,最后结合三要素的信号表达采用电阻网络拟合出调制波。
In the process of the ocean experimental data, it realizes exact target location by using the time-reversing method to process the exploded sound and linear frequency modulation wave. It proves that the method of time-reversing processing is feasible in the actual application. 在海试数据处理中,选择爆炸声和线性调频信号进行时反处理,实现了较准确的目标定位,证明了被动时反定位方法在实际应用中的可行性。
Modulation wave is compared with triangular carrier wave Internal generated by Chip, and the pulse wave is worked to three-phase full-bridge inverting circuit. 调制波在与芯片内部生成的三角载波进行比较,比较后的脉冲波作用到三相全桥逆变器电路,从而实现了对电机转速,转向的控制。