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...
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A 'Digital Control System' is a system that is defined by its adaptability, accuracy, and cost-effectiveness in implementing digital filters for active control applications. It allows for easy adjustment of coefficients, precise signal adjustments, and cost reduction through the use of digital signal...
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 ...
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...
This causes the time series of digital words produced by the accumulator to appear at the input to the angle-to-amplitude converter as P-bit word(s) ranging in value from zero to 2P − 1.The angle-to-amplitude converter maps the P-bit word(s) to one revolution on the unit circle;...
From V200R021C00, DTLS encryption is enabled for CAPWAP control tunnels on the AC by default. After this function is enabled, an AP will fail to go online when it is added. In this case, you need to enable CAPWAP DTLS non-authentication (capwap dtls no-auth enable) for the AP so tha...
Certificate for digital signature (Optional) For more information, see theCreate a digital certificate secretsection of the "Get started with Electronic invoicing service administration" article. 备注 The client identity certificate has an expiration date. Check this date, and arrange a task to obtain...
This new text covers the fundamental principles and applications of digital control engineering, with emphasis on engineering design. Fadali and Visioli cover analysis and design of digitally controlled systems and describe applications of digital control in a wide range of fields. With worked examples...
Includes coverage on the interface between control systems and digital processors, reflecting the reality that most motion systems are now designed with PC software Of particular interest to the practicing engineer is the addition of new material on real-time, remote and networked control systems ...