speed modulation

Three-phase alternating frequency modulation control signal produced by 8051 CPU is magnified to control the switch of the silicon controlled rectifier in inverse main bridge circuit, thereby constant pressure speed-adjusting is realized.

由8051CPU产生三相交流调频控制信号，经放大来控制逆变主桥路中可控硅晶闸管的通断，从而实现恒压调速。

互联网摘选

The key of measuring light speed with modulation wave is measuring the modulation wave length.

利用调制波测量光速的关键在于测量调制波的波长,实验中采用相位差法测调制波的波长.

互联网摘选

The radar altimeter mounted on high speed vehicle demonstrateswideband doppler modulation characteristic.

安装在高速运动载体上的雷达高度表,其地面回波被一宽带多普勒信号所调制.

网络文摘精选

Scraper conveyer motor uses the space vector pulse width modulation ( SVPWM) speed regulating system. This system is not only to get well effect, but to improve utilization of direct voltage in the event that device unchangeableness.

工作部刮板电机采用电压空间矢量脉宽（SVPWM）调速系统，不仅可以得到良好的调速效果，提高有机肥生产质量，还可以在不新增调速设备需求的情况下，提高了直流电压的利用率。

互联网摘选

On the purpose of improving efficiency of continuously variable transmission with reflux power, efficiency of previous system under low gear and reverse gear have been analyzed to optimize its structure based on analysis of speed modulation characteristic and transmission efficiency of transmission system.

在回流式无级自动变速传动系统调速特性和传动效率分析的基础上，以提高效率为出发点，通过对原有系统低速档、倒档工况下的效率分析，并对原有结构进行了优化。

互联网摘选

A New Approach to Speed Measurement of Adaptive Controlled Machine Tools Spindle Speed Modulation System

在线自寻优控制机床主轴转速调速子系统转速测量新方法

互联网摘选

This paper simulates and analyses the torque pulsation because of the modulation frequency and speed variation under ambipolar pulse width modulation;

本文对双极性调制的无刷直流电动机仿真，分析了转速和调制频率对转矩影响；

互联网摘选

Application of Continuous Phase Modulation and Demodulation in the High Speed Frequency-hopping System

连续相位调制及其解调在高速跳频系统中的应用

互联网摘选

A transfusion speed monitor system is designed based on infrared technology with modulation and demodulation.

摘要设计了一种利用红外光的脉宽调制信号来采集输液信息的医用微量输液装置.

网络文摘精选

In this paper, several CPLD speed modulation control systems and IP are presented.

本文设计的几种CPLD调速控制系统以及几个IP核，一部分下载到芯片，通过实际验证；

互联网摘选

the application of speed modulation technology of variable voltage variable frequency on old elevator renovation.

变频变压调速技术在旧电梯改造上的应用.

互联网摘选

mathematical model and speed modulation system for multi-phase permanent magnet machine

多相永磁电机的数学模型及其调速系统的研究

互联网摘选

Researches are focus on all digital modulation demodulation structures and algorithms on the one hand and, and on the another hand on developing prototype with high speed A/ D, D/ A converters and high performance, large scale programmable chips.

研究的重点一方面是针对多种体制信号进行全数字化调制解调高效结构以及实现算法的研究，另一个方面就是采用高速A/D、D/A转换器以及高性能，大规模可编程器件进行样机的工程研制。

互联网摘选

This system senses the amount of rainfall by the infrared rain sensor, and adjusts the speed of wiper based on the fuzzy control algorithm and pulse width modulation technology.

该系统通过红外雨量传感器检测雨量大小，使用模糊控制算法和脉宽调制技术调节雨刷器的速度；给出了系统的总体结构和具体设计方法。

互联网摘选