发酵罐温度对象的抗干扰预测控制

Predictive control for anti-jamming on fermentation temperature control

啤酒发酵过程由于反应机理复杂,其温度对象目前很难建立精确的数学模型,现阶段针对这类大时滞对象的一些典型的控制算法在模型不精确的情况下,难以取得好的控制效果,尤其当存在不可预测的干扰时,控制效果更难保障。因此本文针对啤酒发酵罐温度控制中的这一问题,基于动态矩阵控制的一步控制的思想,将时间最优控制与动态矩阵控制相结合,形成一种能快速抑制扰动的预测控制策略。通过仿真结果验证该控制策略能对干扰进行快速抑制,对发酵罐温度对象有较好的控制效果。

It is difficult to establish the precise mathematical model of fermentation temperature,for the complex reaction mechanism of the beer fermentation process.Fermentation temperature plant is a large time-delay system,some typical algorithms for this kind of systems can not act a good effort as the precise model for this process can not be got.It will be more difficult to guarantee the effort of the controller while the interference in the fermentation process is unpredictable.Aiming at these problems,a new predictive control strategy which can quickly suppress disturbances has been provided by this paper.The strategy is based on the idea of single step control of dynamic matrix control（DMC）,and combines the advantages of both time optimal control and DMC.It is proved by the simulation result that this strategy acts a good effect on the fermentation temperature control and will quickly suppress the interference.