1、.基本概述DDC(Direct Digital Control)直接数字控制,通常称为DDC控制器。DDC系统的组成通常包括中央控制设备(集中控制电 脑、彩色监视器、键盘、打印机、不间断电源、通讯接口等)、现场DDC控制器、通讯网络、以及相应的传感器、执行器、调节阀等元器件。 它代替了传统控制组件,如温度开关、接收控制器或其它电子机械...
This chapter explores the modeling concept of digital control systems. The configuration includes a digital-to-analog converter (DAC), an analog subsystem, and an analog-to-digital converter (ADC). The DAC converts numbers calculated by a microprocessor or computer into analog electrical signals ...
Chapter 5 - Analog control system design Pages 141-179 Purchase View chapter View abstract Select Chapter 6 - Digital control system design Book chapterAbstract only Chapter 6 - Digital control system design Pages 181-252 Purchase View chapter View abstract Select Chapter 7 - State–space representa...
An auxiliary channel coupled to a selected loop in a plurality of process control loops included in a direct digital control system, the channel serving to expand the frequency response of the selected loop. The system is provided with a digital computer acting as an electronic controller common ...
by Eva Murphy and Colm Slattery Download PDF What is Direct Digital Synthesis? Direct digital synthesis (DDS) is a method of producing an analog waveform—usually a sine wave—by generating a time-varying signal in digital form and then performing a digital-to-analog conversion. Because ...
The International Journal of eScience Computing infrastructures and systems are rapidly developing and so are novel ways to map, control and execute scientific applications which become more and more complex and collaborative. Computational and storage capabilities, databases, sensors, and people … ...
A digital signal processor, used as a system controller, controls the DDS and the ADC sampling. The DSP handles the processing requirements of the system with simple arithmetic, or by FFT, DFT, or proprietary algorithms, and may also control any necessary amplitude- and phase calibration of the...
Y. et al. Massively parallel digital transcriptional profiling of single cells. Nat. Commun. 8, 14049 (2017). Article CAS PubMed PubMed Central Google Scholar Kiselev, V. Y., Andrews, T. S. & Hemberg, M. Challenges in unsupervised clustering of single-cell RNA-seq data. Nat. Rev. ...
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