The Appliance Of DDC On Gate Controlling

The deficit of Water resource in China would restrict the development of the national economy and the increasing of living of people. Therefore, it is urgent to exert the benefit of Water conservancy engineering, to increase the accuracy and security of the running of water supply equipment and to improve the working conditions of managers. The scheme of DDC (Direct Digital Control) designed in gate controlling so as to realize digital control is put forward to keep up with the calling of hydraulic automation.Several methods of gate controlling are described in this thesis firstly. On the base of which, DSS(Decision Support System) is introduced , whose function in gate controlling and constitution are shown. According to the composing of DSS, the database and model-base of gate controlling are presented. An online controlling scheme is given followed by which , which is designed incorporating the DDC and PLC (Programmable Logical Controller) . After that, an optimal parameter controlling model is gained through an online analysis. GA ( Genetic Algorithm) is introduced as an assistant design appliance. On the whole, the global research is presented with thecombination of offline design and online test; the reliability and integrity of the database elements can be ensured. Moreover, it can be used as a reference in date processing and model modifying in the future. The scheme will achieve an optimal controlling effect on condition that database of gate control be united with DDC.The whole conceive came into being in the process of groping for a straight, convenient, shortcut and exact way in gate controlling. It' s a new attempt in the Water conservancy. Decision support system is used as a flat roof so as to realize direct digital control.