𝔖 Bobbio Scriptorium
✦   LIBER   ✦

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

✍ Scribed by Rajkumar Palanna; Satish Bukkapatnam; F. Stan Settles

Publisher
Society of Manufacturing Engineers
Year
2003
Tongue
English
Weight
418 KB
Volume
5
Category
Article
ISSN
1526-6125

No coin nor oath required. For personal study only.

✦ Synopsis

This paper presents the model-based tampering (MBT) methodology to address performance degradation in complex nonlinear processes. MBT involves characterizing the dynamics of a process through experiments to derive nonlinear stochastic differential equation (n-SDE) models that can accurately and compactly represent a process, and using these models to dynamically compensate for the effects of process degradation on the performance. This research has yielded a new method to derive n-SDE models of complex processes through a signal-based reconstruction of Fokker-Planck equations.

MBT was applied to control surface finish during cylindrical grinding of shafts of air bearings used in aircraft environmental control systems (ECS)-a core competency of Honeywell. It has been shown that n-SDE models help capture patterns in process outputs that cannot be captured using any simpler models, and that MBT reduces the surface finish variation by 62% over the current industry practice.

📜 SIMILAR VOLUMES

On the selective silica application to i
On the selective silica application to improve welding performance of the tungsten arc process for a plain carbon steel and for aluminium
✍ Stéphane Sire; Surendar Marya 📂 Article 📅 2002 🏛 Elsevier Science 🌐 French ⚖ 120 KB

This Note presents ways to improve the weld penetration potential of TIG process by optimising silica application around the joints in a plain carbon steel and an aluminium alloy 5086. Whereas for plain carbon steels, full coverage of joint improves penetration, the presence of a blank zone around t

Model-based characterization of an amino
Model-based characterization of an amino acid racemase from Pseudomonas putida DSM 3263 for application in medium-constrained continuous processes
✍ M. Bechtold; S. Makart; R. Reiss; P. Alder; S. Panke 📂 Article 📅 2007 🏛 John Wiley and Sons 🌐 English ⚖ 295 KB

## Abstract The amino acid racemase with broad substrate specificity from __Pseudomonas putida__ DSM 3263 was overproduced and characterized with respect to application in an integrated multi‐step process (e.g., dynamic kinetic resolution) that—theoretically—would allow for 100% chemical yield and