Non-intrusive data analytics in a process control system

摘要

An on-line data analytics device 52 can be installed in a process control system as a standalone device that operates in parallel with, but non-intrusively with respect to, the on­line control system to perform on-line analytics for a process without requiring the process control system to be reconfigured or recertified. The data analytics device includes a data analytics engine 60 coupled to a logic engine 62 that receives process data collected from the process control system in a non-intrusive manner. The logic engine, using a simulated portion of the process plant 80, determines further process variable values not generated within the process control system and provides the collected process variable data and the further process variable values to the data analytics engine. The data analytics engine executes statistically based process models 70, such as batch models, stage models, and phase models, to produce a predicted process variable, such as an end of stage or end of batch quality variable for use in analyzing the operation of the on-line process.