唐尼小姐
1)dcs 离散控制系统的统称 是各个子系统的总称 可以包括好多分系统； 2）ESD——紧急停车系统 ESD是英文Emergency Shutdown Device紧急停车系统的缩写。ESD紧急停车系统按照安全独立原则要求，独立于DCS集散控制系统，其安全级别高于DCS。在正常情况下，ESD系统是处于静态的，不需要人为干预。作为安全保护系统，凌驾于生产过程控制之上，实时在线监测装置的安全性。只有当生产装置出现紧急情况时，不需要经过DCS系统，而直接由ESD发出保护联锁信号，对现场设备进行安全保护，避免危险扩散造成巨大损失。具有关资料，当人在危险时刻的判断和操作往往是滞后的、不可靠的，当操作人员面临生命危险时，要在60s内作出反应，错误决策的概率高达99.9%。因此设置独立于控制系统的安全联锁是十分有必要的，这是作好安全生产的重要准则。该动则动，不该动则不动，这是ESD系统的一个显著特点。 3）TAS 霍尼韦尔的油库自动化系统(TAS) Terminal Automation System 它是一个专用的系统 用来解决某一方面的控制问题！
原来我在这里8
在系统功能方面，DCS和集中式控制系统的区别不大，但在系统功能的实现方法上却完全不同。分布式控制系统，或在有些资料中称之为集散系统，是相对于集中式控制系统而言的一种新型计算机控制系统，它是在集中式控制系统的基础上发展、演变而来的。
巫毒小子
MATLAB discrete time systems in time domain and frequency domain analysisPurposeBecome more familiar with and master the system function H (Z) analysis of discrete-time systems in time domain and frequency domain characteristics;Review how MATLAB language in time domain and frequency domain analysis of discrete-time systemsContent(1) the use of the MATLAB command to draw a discrete-time system pole-zero diagram, impulse response and frequency response curveTwo pole-zero diagram of the system to analyze the stability of the discrete systemPrincipleSystem function of the discrete-time system that is: XXXXXXTo note is that the system function of the discrete-time system may have two forms, one is the numerator and denominator polynomial according to Z Positive Power term arrangement, the other is the numerator and denominator polynomial according to Z negative power times the Arrangement. Either arrangement, the dimensions of the numerator and denominator polynomial coefficient vector must be the same, different use 0 filled, otherwise Z = 0 the zero or pole can be left out.Pole-zero distribution of the system function H (Z) can determine the characteristics of the system has very important significance to the analysis of the discrete system characteristics. Through the analysis of poles and zeros of the system function for discrete systems, the characteristics of the following aspects:Time-domain characteristics of a system impulse response h (n)(2) stability of discrete systems3 the frequency characteristics of the discrete system (amplitude-frequency response and phase frequency response)MATLAB provides us with the solving of these features and draw the pole-zero diagram of the system function-related functions, such as zplane, impz, freqz, the use of these functions see the book 6.5 and 6.6.The implementation of the procedures required by the graphics, as shown below.From pole-zero diagram of Figure 1 you can see, the function of the system poles inside the unit circle, so the system is a stable system.TaskA system function XX known discrete systems, try using MATLAB analysis of the system in time domain and frequency domain characteristics. Requirements: pole-zero diagram, respectively, to draw in a window system, impulse response, amplitude frequency and phase-frequency characteristics, and determine the stability of the system.Known a discrete-time system block diagram shown in Figure 2, try using MATLAB analysis of the frequency characteristics of the system. Requirements: pole-zero diagram, respectively, to draw in a window system, the phase frequency response curve, 0-π and 0-2π range of the amplitude-frequency characteristics, and analyze the stability of the system and to complete the function.Thinking titleIf you want to show the frequency characteristics of the 0-of π and 0-2π range in order to observe the cyclical nature of the frequency response of discrete-time system, how to adjust your MATLAB command?
晓布丁2011
离散的英文是discrete。
discrete：adj. 不连续的，分离的；【数】离散的
sole discretion.自行决定权。
Discretization:The act of making mathematically discrete.
离散化：使成为数学上的离散形式的行为。
Discretion is the better part of valour.有勇有谋才是好汉。
discrete time system离散时间系统
discrete searching aids离散式检索工具
discrete time signal离散时间信号
