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型砂紧实率控制是型砂质量控制的重要内容之一。本文就连续式混砂机水分控制进行了系统的研究。建立紧实率控制数学模型，进行基于经典控制理论和模糊控制理论的控制器设计，并对仿真结果做了比较研究
Sand compacting rate control is one of the important content of sand quality control. In this paper, the continuous sand mixer moisture control system was studied. The mathematic model of compaction rate control is established, and the controller design based on classical control theory and fuzzy control theory is made, and the simulation results are compared