| Along with the extensive use of powdery explosive in the industrial manufacture and construction, the research and spread of continuous production technology on powdery explosive have become an intensive problem. Adding the oil phase following the flux of the ammonium nitrate is one of the key processes in the process of powdery explosive production. The control is of important significance in improving the quantity and quality of product, decreasing working intensity.The mechanic theory and characteristic of the production process are analyzed in this paper. Considering the time-delay characteristic of the oil-adding process and the characteristics of ammonium nitrate transmission that are non-linear, large inertia and time delay, expert control strategy is used in this paper to carry out the auto control of flux on the condition that the exact model of control object is hard to be built.Taking into account the factors to the continuous production of powdery explosive, two expert controllers are adopted, where the knowledge is represented in the form of the production rule, and the inference engine adopts the Forward chaining and Depth-first search. The temperature of the oil is controlled to keep steady by the first expert controller. Based on the feedback parameters of production process, the flux control of oil is achieved by the second expert controller.The intelligent control based on expert strategy is used in powdery explosive production process in Zhejiang Shunyuan Chemical Plant. The control system has been in operation since June, 2007. The validity of this strategy is proved by the running results. The control system is stable and reliable. The flux of oil is effectively controlled. The continuous production is successfully realized. The quantity and quality of product are improved, thus significant economic benefits is obtained. |
PDF Full Text Request