Model-Based Tampering for Improved Process Performance—An Application to Grinding of Shafts

摘要: Abstract This paper presents the model-based tampering (MBT) methodology to address performance degradation in complex nonlinear processes. MBT involves characterizing dynamics of a process through experiments derive stochastic differential equation (n-SDE) models that can accurately and compactly represent process, using these dynamically compensate for effects on performance. research has yielded new method n-SDE processes signal-based reconstruction Fokker-Planck equations. was applied control surface finish during cylindrical grinding shafts air bearings used aircraft environmental systems (ECS)—a core competency Honeywell. It been shown help capture patterns outputs cannot be captured any simpler models, reduces variation by 62% over current industry practice.