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2018 | Buch

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Performance gaps of machines

A process oriented approach

verfasst von: Prof. Dr. Wilhelm Nüßer, Dipl.-Ing. Thilo Steckel

Verlag: Springer Berlin Heidelberg

Buchreihe : Intelligente Technische Systeme – Lösungen aus dem Spitzencluster it’s OWL

Enthalten in: Springer Professional "Wirtschaft+Technik" , Springer Professional "Technik" , Springer Professional "Wirtschaft"

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Über dieses Buch

In this publication a widespread phenomenon is studied: in many usage scenarios modern complex machines show a significant difference between the maximum sustainable performance available in well specified environments and the average performance many users experience in their everyday interaction with the machine. This performance gap appears to be increasing with technical progress and performance of machines.

Although this situation is probably well known to many readers -- and very often not so quietly endured -- it was not studied systematically so far. This publication describes the conceptual background of the performance gap in a very general way. It develops a semi-quantitative description and points to approaches to reduce the performance gap in current and future environments.

Process executives, engineers and system analysts will hopefully benefit from this approach especially in the dynamic environments envisioned in initiatives like the German Industrie 4.0.

In the technology network Intelligent Technical Systems OstWestfalenLippe (short: it’s OWL) around 200 companies, universities, research institutions and organisations have joined forces to jointly shape the innovative leap from mechatronics to intelligent technical systems. Together they develop approaches and technologies for intelligent products and production processes, smart services and the working world of the future. The spectrum ranges from automation and drive solutions to machines, vehicles, automats and household appliances to networked production plants and platforms. This creates a unique technology platform that enables companies to increase the reliability, resource efficiency and user-friendliness of their products and production systems and tap the potential of digital transformation.

Inhaltsverzeichnis

Frontmatter

Chapter 1. Introduction

Abstract

Today’s complex machines are valuable assets and crucial for modern, effective production processes of companies. A detailed understanding of the performance of these machines is therefore of outstanding importance both for users and for producers of machines. When users measure the performance of machines they monitor the work of the machine not in an isolated environment but within the local and sometimes changing environment. Their own specific production processes constitute an important part of this environment their machine works in. In the context of production the most simple and accessible performance measure is the time it takes to achieve a predefined amount of process output. Consequently, in many cases the machine performance is computed by the most basic definition of performance: the ratio of achieved work during the whole process divided by the time used for this process.

Wilhelm Nüßer, Thilo Steckel

Chapter 2. Concepts and Definitions

Abstract

The main concepts required for a better understanding of performance losses of machines should be related to observable entities like processes and performance indicator. Consequently, we first lay down the basic definitions for these two notions.

Wilhelm Nüßer, Thilo Steckel

Chapter 3. Derivation and validation of the gap formula

Abstract

In the previous chapter we introduced the concepts of process variability via perturbations and machine specificity. For a machine working in a process for a given time we can also view the process variability as a measure of the changes in the environment in which the machine has to work in. In a first approximation we therefore assume that all influences on the machine are described and mediated by process changes.

Wilhelm Nüßer, Thilo Steckel

Chapter 4. Applications

Abstract

The preceding sections have shown that the performance losses of machines and even systems of machines relative to some optimal performance are basically caused by perturbations which manifest themselves in an increased process variability and the ability of machines to adapt to these new situations. The derivation also made clear that accelerating the process execution by reducing the optimal time t ₀ and thus increasing the nominal performance of a machine will in general only enlarge the gap.

Wilhelm Nüßer, Thilo Steckel

Chapter 5. Conclusion

Abstract

In this final chapter we try to summarise and afterwards evaluate the numerous results created in this publication.

Wilhelm Nüßer, Thilo Steckel

Backmatter

Titel: Performance gaps of machines
verfasst von: Prof. Dr. Wilhelm Nüßer
Dipl.-Ing. Thilo Steckel
Verlag: Springer Berlin Heidelberg
Electronic ISBN: 978-3-662-56446-2
Print ISBN: 978-3-662-56445-5
DOI: https://doi.org/10.1007/978-3-662-56446-2

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