针对间歇过程中最优操作轨线经常从生产经验中人工获取的问题,提出了一种基于过程神经网络(process neural network,PNN)模型的自动计算方法。利用PNN独特的时间聚合算子特点,建立反应操作变量与产品质量之间的关系。基于此时间函数模型,通过产品质量性能指标优化计算,获得最佳的控制轨线,作为实际生产的设定曲线。最后,MPCE仿真平台的间歇反应实验说明了该方法的有效性。
The optimal operation trajectory of a batch process is always determined by experienced workers, based on their rich experience. Obviously this method is time-consuming and laborious. In order to overcome this problem, a simple and fast mathematical method is given based on a process neural network (PNN) model. A PNN is used to model batch processes in order to overcome the restrictions on instantaneous synchronization input for a traditional neural network. Based on the PNN, a quadratic form performance index function is presented which allows the optimal operating trajectory to be obtained. The proposed scheme is successfully applied to a simulated batch process.