查询词典 control signal

Vector control. digital signal processor. induction motor.

矢量控制，数字信号处理器，异步电机

The future development trend is except high-end DTVs with more than 37 inches in size, the other sizes of TV will all adopt highly integrated single chip design, which integrates signal demodulator chip, video-control chip, MPEG-2 decode chip, video processing chip, HDMI interface chip and audio frequency processing chip into a single chip, namely SoC.

而未来的发展趋势是除高级的超过37英寸的数字电视外，其余尺寸的电视都会采用高度集成的单芯片设计，信号解调芯片、视频控制芯片、MPEG-2解码芯片、视频处理芯片、HDMI接口芯片和音频处理都会集成在一片芯片上。

Currently, digital TV mainly has about seven chips, like Signal demodulator chip, video-control chip, MPEG-2 decode chip, video processing chip, HDMI interface chip, audio frequency treatment chip and audio frequency amplification chip.

目前数字电视里主要芯片有信号解调芯片、视频控制芯片、MPEG-2解码芯片、视频处理芯片、HDMI接口芯片、音频处理与音频放大芯片，也就是大约7片IC。

Dynamic Video signal processing and feature extraction technology is the key to intelligent control.

动态视频信号处理和特征提取技术是实现拟人智能控制的关键。

Circuit system used varistor constitute the Wheatstone bridge to collect small changes in voltage, After amplification circuit amplified into A / D converter circuit, the input voltage digital signal after the conversion output AT89S52 conducted by the control and data processing and results in the LCD display.

系统电路采用压敏电阻构成惠斯登电桥来采集电压的微小变化，经过放大电路放大后送入A/D转换电路，对输入电压信号进行数字量的转换后输出，由AT89S52进行系统的控制和对数据的处理并将结果显示在液晶显示器上。

Then the creative research work on ultra-low frequency and large amplitude elcectromagnetic vibrator based on moving magnet is done, improving exciting signal at ultra-low frequency, and, the theoretic analysis and experiment model are studied. Thus, the reference for establishing ultra-low frequency standard vibrator in future is provided. In chapter 5, two control strategies for ultra-low frequency standard vibrator test table waveform are studied.

首先采用机械振动隔振理论，研究设计了机械低通滤波器来滤除噪声信号，并运用等效的小振级信号进行了实验研究，得出了有益的结论；然后为提高超低频时激振信号，作者创造性地提出了动铁型大位移的电动振动台结构，进行了理论分析和实验模型研究，为将来建立大位移的超低频标准振动台提供了参考。

Its software uses system self-detecting algorithm to assure measurement channel .It uses softening hardware technique software synchronic data sampling to trace the frequency of exterior signal, in other words , it gives sampling control signals 128 times of power net's frequency .It uses Direct Digital Frequency Synthetics algorithm to transform radical sine waveform parameter table into needed current. It uses FFT algorithm to get radical waveform altitude of current ,voltage and resistor .

整个系统在软件设计上采用系统自检验算法保证测量通道可用，采用硬件软化技术--软件锁相环技术，达到对外部信号频率的跟踪，给出频率为电网工频128倍的采样控制信号：直接数字频率合成技术将基波参数表转换成需要的电流信号，采用FFT变换及基波幅度的计算方法得到被测电流、电压基波幅度和电阻大小。

Based on dq model in the unified reference frame, at first the steady-state dq model in the stator power winding synchronous speed reference frame was obtained; next the method of the static stability analysis was presented and the small signal model was developed, and then the stability condition was given by means of Lyapunov theorem and the input conditions of different control strategies were studied.

在其任意坐标系下dq模型的基础上，推导出功率绕组同步速坐标系下稳态dq模型；提出一种静态稳定性分析的方法，并建立小信号模型；由李雅普诺夫稳定判据得出电机稳定运行的条件，并且根据不同的控制策略讨论其输入条件。

Can be a long time in the vicinity of the enemy's territorial waters or on the high seas cruising and roaming, and the enemy coast, combat ships and other targets in the sea and electronic surveillance: Receive and record enemy radio communications, radar and weapons control systems, electromagnetic waves emitted signal, these electronic devices to identify the tactical and technical performance; the identification of radio, radar and sonar station location and distribution system, identify the relationship between its command ; listening phones, intercepted and deciphered wireless telegraphy; tracking and monitoring ships and other marine activities.

能够长时间地在敌方领海附近或公海上游弋和漂泊，对敌沿海地区、作战海域和舰船等目标实施电子侦察：接收并记录敌方无线电通信、雷达和武器控制系统等发出的电磁波信号，查明这些电子设备的战术技术性能；查明无线电台、雷达站和声纳站的位置和配系，判明其指挥关系；侦听无线电话，截获并破译无线电报；跟踪监视海上活动的舰船等。

This paper is an attempt to reviewbriefly the following fourresearch trends in plant physiology at the turn of century: from research on biological macromolecules to clarification of complex life activities-genomics,construction and function of gene; a key link in achieving integrated life activity-signal transduction; the energy and material basis of life activity metabolism and its control; the interrelationship between plant and environment (both biological and abiological )-biological coevolution and adaptability.

文摘：简要介绍了当今植物生理学研究中值得注意的四个动向，它们是：从研究生物大分子到阐明复杂生命活动——基因组学、基因结构与功能的研究；实现生命整体性的重要环节——信号传递的研究；生命活动的能量和物质基础——代谢及其调节的研究；植物与环境的相互关系——生物的协同进化和适应的研究。

Finally, according to market conditions and market products this article paper analyzes the trends in the development of camera technology, and designs a color night vision camera.

最后根据市场情况和市面上产品的情况分析了摄像机技术的发展趋势，并设计了一款彩色夜视摄像机。

Only person height weeds and the fierce looks stone idles were there.

只有半人深的荒草和龇牙咧嘴的神像。