Adaptive Modeling for Shifting Process Conditions
11 October 2016
Operating conditions change. To maintain maximum profitability, APC applications must change with them. Due to differential challenges, the traditional method of step-test, model, and then deploy is burdensome, often insurmountably so. Fortunately, with AspenTech’s calibrate mode and the online adaptive modeling tools, inconsistencies between the plant and the model can quickly be identified, corrected, and deployed without additional step-testing or disrupting operations. Rather than exclusively utilizing gain-multipliers, the time-constant is updated as well, providing better dynamic controller behavior. With better dynamic control, the application more readily maintains steady-state targets and rejects disturbances, resulting in higher controller uptime and greater profitability.