Patent ID: 7117046
Filing Date: 2006-10-03
Classification: B01D,G05B

Abstract:
1. A multi-tier controller for directing operation of a system performing a process, having multiple process parameters (MPPs), at least one of the MPPs being a controllable process parameter (CTPP) and one of the MPPs being a targeted process parameter (TPP), and having a defined target value (DTV) representing a first limit on an actual average value (AAV) of the TPP over a defined time period of length TPL AAV2 , with the AAV computed based on actual values (AVs) of the TPP over the defined period, comprising: a first logical controller having logic to predict future average values (FAVs) of the TPP over a first future time period (FFTP) having a length of at least TPL a second logical controller having logic (a) to establish a further target value (FTV) representing a second limit on the AAV of the TPP for a second future time period (SFTP), the SFTP having a length equal to TPL