中英文智能樓宇自動化系統(tǒng)方案-免費閱讀
【正文】 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 architecture of the risk of dispersion, improved reliability,. The basic structure and function shown in Figure 3, the figure scene controllers, data acquisition station, engineer station, operator station, monitor and manage puter data munication through puter networks are organically bined to form the hierarchical distributed control system A distributed control system data munications network Data munication network is a pillar of the distributed control system. The structure of the distributed control system, which is a network structure, the control station, data acquisition station, engineers, operator stations, monitoring station is the puter on the network node, contain the CPU an
規(guī)章制度相關推薦
鄂ICP備17016276號-1