改进的动态矩阵控制算法在发酵罐温度控制中的应用

Application of improved dynamic matrix control algorithm to fermentation temperature control

啤酒发酵是一类复杂的生化反映过程,其温度控制具有大时滞特性。由于机制复杂、环境多变,温度对象难以建立精确的数学模型,常规控制方式难以胜任此类系统的控制,并且当存在不可预测的干扰时,控制效果更难保障。针对这一问题,以啤酒发酵罐的温度为控制对象,将动态矩阵控制(DMC)引入该温度控制,基于DMC一步控制的思想,引入时间最优控制对DMC控制量进行改进,形成快速响应的预测控制算法。应用结果表明该算法有效提高了系统对干扰的抑制能力,具有较好的应用价值。

Beer fermentation is a kind of complex biochemical reaction, the temperature control of which has the feature of large time delay, and it is difficult to establish an accurate mathematical model for this plant as the complex mechanism and the changing environment. The conventional control algorithms always cannot act well in this kind of system, especially while there are several unpredictable interferences. In order to solve these problems, a new prediction control strategy for fermentation temperature was proposed based on Dynamic Matrix Control （DMC） which had been improved by the time optimal control. The application results show that this strategy exerts a good effect on the fermentation temperature control and quickly suppresses the interferences.