中英文智能樓宇自動(dòng)化系統(tǒng)方案-全文預(yù)覽
【正文】 災(zāi)情發(fā)生時(shí)，能夠按照約定實(shí)現(xiàn)操作權(quán)轉(zhuǎn)移，進(jìn)行一體化的協(xié)調(diào)控制。(4)監(jiān)測(cè)并及時(shí)處理各種意外、突發(fā)事件。3安裝于中央控制室的中央管理計(jì)算機(jī)具有CRT顯示、打印輸出、豐富的軟件管理和很強(qiáng)的數(shù)字通信功能，能完成集中操作、顯示、報(bào)警、打印與優(yōu)化控制等任務(wù)，避免了常規(guī)儀表控制分散后人機(jī)聯(lián)系困難、無(wú)法統(tǒng)一管理的缺點(diǎn)，保證設(shè)備在最佳狀態(tài)下運(yùn)行。DigitalDDC系統(tǒng)中的計(jì)算機(jī)直接承擔(dān)控制任務(wù)，因而要求實(shí)時(shí)性好、可靠性高和適應(yīng)性強(qiáng)。模擬量輸入通道由變送器、采樣開(kāi)關(guān)、放大器、A／D轉(zhuǎn)換器和接口電路組成。過(guò)程輸出通道由模擬量輸出和數(shù)字量輸出兩部分組成。3．1．2式中e(t)——偏差(設(shè)定值與實(shí)際輸出值之差)u(t)——控制量Kp——比例放大系數(shù)Ti一積分時(shí)間常數(shù)Td——微分時(shí)間常數(shù)寫(xiě)成傳遞函數(shù)形式為了能在計(jì)算機(jī)上實(shí)現(xiàn)，必須將連續(xù)形式的微分方程化為離散形式的差分方程。Control3．2．1分布式控制系統(tǒng)的通信網(wǎng)絡(luò)不同于通用計(jì)算機(jī)網(wǎng)絡(luò)，與一般的通信網(wǎng)絡(luò)比較，它有如下特殊要求：①有高可靠性和安全性，要求傳遞的信息絕對(duì)準(zhǔn)確、可靠，為此常采用冗余技術(shù)、后備措施和自診斷功能?！ ?2)網(wǎng)絡(luò)拓?fù)浣Y(jié)構(gòu)用于建筑自動(dòng)化控制網(wǎng)絡(luò)的BACnet協(xié)議由物理層、數(shù)據(jù)鏈路層、網(wǎng)絡(luò)層和應(yīng)用層組成，或相當(dāng)于開(kāi)放系統(tǒng)互聯(lián)參考模型(OSI)的第一、二、三、七層協(xié)議其中：ARCnet為令牌總線網(wǎng)，數(shù)據(jù)傳輸速率為2．520bit／s，有良好的實(shí)時(shí)性。結(jié)束語(yǔ) 樓宇自動(dòng)化控制技術(shù)在我國(guó)還是一個(gè)新興的技術(shù)領(lǐng)域，隨著更多智能建筑的出現(xiàn)，將有更加先進(jìn)的技術(shù)補(bǔ)充到這一領(lǐng)域中，使這一技術(shù)更加成熟、完善。 Direct Digital Control System in accordance with the deviation of the ratio of the basic algorithm (P), integral (I) and differential (D) control, a continuous system technology is mature, the most widely used as a basic law, the PID control Guilv discrete implementation of and make puter, can easily be accumulated to use this proven technology, but also the alleged target of the mathematical model or parameter is not very clear under the circumstances, Jing Guoline tuning of Xiaoguo satisfactory. Therefore, the law regulating discrete analog digital PID algorithm, puter control of industrial processes have been widely adopted system, a DDC system, the basic algorithmDigital PID control algorithm, analog PID controller ideal formula for the type of e (t) deviation (set value and the actual output value of the error) u (t) control the amount of Kp Ti a scaling factor Integral time constant Td differential time constant transfer function written in the form of a puter in order to achieve, must be a continuous form of differential equations into discrete form of differential equations. Set for the sampling period (pared with the system time constant, T is small enough), k is sampling number (k = 0,1,2, ... ...), can be calculated and rectangular plot to replace the differential difference Type in e (k) kth sample from the deviation e (k1) s (k1) subsample from the deviation of u (k) ktime control of traffic on the type of The smaller the sampling period T (parison with the system time constant), was charged with the process and the continuous control process approached, also known as quasicontinuous control The architecture of distributed control system distributed control system (Distributed Control Systems referred to as DCS) 20 century in the mid 70s and quickly developed, it will puter technology, control technology, graphics and munication technologies together in one , can spread over the scene of the equipment control, but also convenient to centralized management, operation, and the past, the control system, both to avoid Le single centralized puter control of the inadequacy of Overe conventional humanputer interaction difficulties the shortings instrument .Distributed control system of multiple microputer system to replace the centralized control of a single puter, from the arc
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