System Engineering, Plant Engineering and Functional Models

Witte, Martin

doi:10.1007/bf03323497

Cited by 2 publications

(1 citation statement)

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“…Furthermore, changes in one discipline can affect others [47]. For this reason, unintended cross-discipline property shifts may arise when changes are implemented [53]. Detecting and evaluating such unwanted side-effects can be very complicated and time consuming [47], especially under consideration of the aforementioned deficiencies of undocumented changes.…”

Section: Motivationmentioning

confidence: 99%

Automated Determining of Manufacturing Properties and Their Evolutionary Changes from Event Traces

2016

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Production plants are usually kept in operation for several decades. During this long operational phase operation requirements and other production conditions change frequently. Accordingly, the plants have to be adjusted in behavior and/or structure by adapting software and physics of the plant to avoid degeneration. Unfortunately, in industrial practice, changes, especially smaller ones, are often performed ad-hoc without appropriate adaptation of formal models or documentation. As a consequence, knowledge about the process is only implicitly available and an evaluation of performed changes is often omitted, resulting in sub-optimal production performance. Present research approaches to overcome these deficiencies usually concentrate on (a) manual modelling with manual or automatic analysis on a high level of abstraction; or (b) on automatic model generation from observations without lifting gathered knowledge to easy interpretable indicators. The approach presented in this paper combines both methods (a) and (b) by learning models from observation of input / output signals of the production plant's control system. Semantics are added by using a priori information modelling which is less tedious compared to modelling the process itself. The learned models are used to automatically detect changes by continuously comparing their behavior with real plant behavior during operation as well as to evaluate performed changes. An analysis of the models results in high-level property values such B Jan Ladiges

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Section: Motivationmentioning

confidence: 99%