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Article
Publication date: 29 April 2014

Wieńczysław Stalewski and Jerzy Żółtak

The purpose of this paper is to present the results of the preliminary design and optimization of the air-intake system and the engine nacelle. The work was conducted as…

Abstract

Purpose

The purpose of this paper is to present the results of the preliminary design and optimization of the air-intake system and the engine nacelle. The work was conducted as part of an integration process of a turboprop engine in a small aircraft in a tractor configuration.

Design/methodology/approach

The preliminary design process was performed using a parametric, interactive design approach. The parametric model of the aircraft was developed using the PARADES™ in-house software. The model assumed a high level of freedom concerning shaping all the components of aircraft important from the point of view of the engine integration. Additionally, the software was used to control the fulfillment of design constraints and to analyze selected geometrical properties. Based on the developed parametric model, the preliminary design was conducted using the interactive design and optimization methodology. Several concepts of the engine integration were investigated in the process. All components of the aircraft propulsion system were designed simultaneously to ensure their compliance with each other.

Findings

The concepts of the engine integration were modified according to changes in the design and technological constraints in the preliminary design process. For the most promising configurations, computational fluid dynamics (CFD) computations were conducted using commercial Reynolds-averaged Navier–Stokes solver FLUENT™ (ANSYS). The simulations tested the flow around the nacelle and inside the air-delivery system which consists of the air-intake duct, the foreign-particles separator and the auxiliary ducts delivering air to the cooling and air-conditioning systems. The effect of the working propeller was modeled using the Virtual Blade Model implemented in the FLUENT code. The flow inside the air-intake system was analyzed from the point of view of minimization of pressure losses in the air-intake duct, the quality of air stream delivered to the engine compressor and the effectiveness of the foreign particles separator.

Practical implications

Based on results of the CFD analyses, the final concept of the turboprop engine integration has been chosen.

Originality/value

The presented results of preliminary design process are valuable to achieve the final goal in the ongoing project.

Details

Aircraft Engineering and Aerospace Technology: An International Journal, vol. 86 no. 3
Type: Research Article
ISSN: 0002-2667

Keywords

Article
Publication date: 1 April 1981

Gill Blay

The objective of software development is to produce accurate, efficient, easily maintainable systems which perform reliably and meet the users' needs as effectively as…

Abstract

The objective of software development is to produce accurate, efficient, easily maintainable systems which perform reliably and meet the users' needs as effectively as possible. However, this objective is still not being achieved in most installations. During the last ten years many good methodologies for programming have been introduced and it is generally agreed that the use of almost any of these solves most, if not all, of the problems encountered during programming. But methodologies for commercial systems design have not become so well established, although it is generally recognised that many systems are poorly designed and that this causes problems in later development stages and subsequent maintenance. The design problem has been highlighted since programming has improved so much through the use of new techniques.

Details

Industrial Management & Data Systems, vol. 81 no. 4/5/6
Type: Research Article
ISSN: 0263-5577

Article
Publication date: 1 March 1995

Hubert K Rampersad

Examines the conceptual design of robotic assembly systems inconjunction with the analysis and optimization of the product and processdesign. Explains how an integral…

Abstract

Examines the conceptual design of robotic assembly systems in conjunction with the analysis and optimization of the product and process design. Explains how an integral assembly model is utilised to study the relationships between assembly variables which play a role in each stage of the design process. Outlines the characteristics and benefits of the concentric design process and explains the total productivity concept. Concludes that the integral assembly model, which underlies the concentric design process, provides the opportunity to store product, process and system data and can therefore be considered as a reference model for product development and process planning as well as for the design and analysis of assembly systems.

Details

Assembly Automation, vol. 15 no. 1
Type: Research Article
ISSN: 0144-5154

Keywords

Article
Publication date: 1 March 1975

James C. Taylor

For me, the human side of work is the most important aspect in any consideration of jobs and organizations. Hospital organizations, for example, are made up of people…

Abstract

For me, the human side of work is the most important aspect in any consideration of jobs and organizations. Hospital organizations, for example, are made up of people, their jobs are, of course, done by people, and the results of that work are for people — whether they be direct recipients such as patients, or customers; or whether they be the indirect recipients such as the community, or the employees themselves. The dilemma is highlighted by asking, why do we so often separate the effects of work on the humans involved in its production, from the effects on humans as recipients of its end result? I will posit that if work is consciously designed as a meaningful activity for the people involved in its production, then chances are good that its product will also better suit its human users. That is, there is a systemic relationship between the quality of working life and the quality of the product of that work. In so saying however we must likewise acknowledge the importance of the technical requirements of the work — for having meaning to the people involved is not enough. Work that is meaningfully arranged, both for the humans involved in its execution and for its technical requirements, typically results in a higher quality product and, not infrequently, in greater productivity as well. In our experience results are frequently accompanied by lowered absenteeism and turnover and greater feelings of satisfaction with the work activity. Work system design, or socio‐technical system design, is a powerful approach to this human side of work — work that is meaningful in both that human sense, as well as the technical sense.

Details

Personnel Review, vol. 4 no. 3
Type: Research Article
ISSN: 0048-3486

Article
Publication date: 1 June 2003

R. Brahme and A. Mahdavi

It is important to provide building performance feedback to the designer as early as possible in the design process. However, many aspects of building performance are…

Abstract

It is important to provide building performance feedback to the designer as early as possible in the design process. However, many aspects of building performance are significantly affected by the design of the building’s technical systems (e.g., heating, airconditioning), which are typically configured in detail only in the later stages of design. The challenge is thus to find a method to use detailed simulation tools even during the early stages of design when values for many of the variables for the building’s technical systems are not yet available. In this paper, we demonstrate how this problem can be partially solved by use of differential representation for building and technical system, homology‐based automatic mapping of relevant information from the building to the technical system representation, and generative design agents which, with a minimal user‐input, can design and model the technical system. We conclude the paper with illustrative examples of detailed performance analysis of complex buildings and their heating, ventilation, and air‐conditioning systems, performed in early stages of design.

Details

Construction Innovation, vol. 3 no. 2
Type: Research Article
ISSN: 1471-4175

Keywords

Article
Publication date: 1 September 2004

Niels Lohse, Svetan Ratchev and George Valtchanov

The development of reconfigurable modular production systems is one of the crucial factors for manufacturers to sustain their competitive advantage in areas such as…

Abstract

The development of reconfigurable modular production systems is one of the crucial factors for manufacturers to sustain their competitive advantage in areas such as precision assembly. To ensure the effective and cost efficient configuration and successive reconfigurations it is of critical importance to involve all stakeholders in the decision‐making process. The reported research is targeting the development of an integrated Web‐enabled decision‐making environment that supports some of the key assembly system engineering stages from user requirement specification to system implementation. The focus is on the design of assembly workstations based on detailed process requirements with a target of developing highly efficient and cost‐effective solutions. The paper presents an application framework for collaborative distributed design supported by domain ontologies and is illustrated using an industrial case study.

Details

Assembly Automation, vol. 24 no. 3
Type: Research Article
ISSN: 0144-5154

Keywords

Article
Publication date: 8 September 2022

Yildiz Kose, Suleyman Muftuoglu, Emre Cevikcan and Mehmet Bulent Durmusoglu

Autonomous maintenance (AM), one of the pillars of total productive maintenance (TPM), aims to achieve performance toward zero defects and zero breakdowns. AM system

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Abstract

Purpose

Autonomous maintenance (AM), one of the pillars of total productive maintenance (TPM), aims to achieve performance toward zero defects and zero breakdowns. AM system equipped with comprehensive lean tools provides continuous improvement during the AM activities. Despite its long duration, establishing a lean AM system with a robust guideline would provide significant benefits such as high quality and short lead time. Therefore, AM design approach should be provided in a holistic and detailed manner. This study aims to develop a framework for AM design, including preliminary, reactive, preventive and proactive steps using the axiomatic design (AD).

Design/methodology/approach

Requirements and technical parameters of the AM system are explored with AD. An extensive literature review and a real-life application are presented.

Findings

The proposed design was validated by adapting the proposed roadmap to a textile manufacturing system in Turkey. The application results justify the established AM system design with an average downtime improvement of 69.2% and the average elapsed time between two failures improvement of 65.1% for apparel department.

Originality/value

This study has the novelty of establishing an overall AM system design with all of its stages stepwise. It presents a comprehensive guideline in terms of integration of lean philosophy into AM design by generating maintenance-related use cases for lean tools. The developed approach facilitates creating and analyzing complex systems to improve maintenance implementations while reducing nonvalue-added operations.

Details

International Journal of Lean Six Sigma, vol. ahead-of-print no. ahead-of-print
Type: Research Article
ISSN: 2040-4166

Keywords

Article
Publication date: 1 May 2006

Changduk Kong, Myoung‐cheol Kang, Chang‐ho Lee and Dong‐ju Han

To set‐up a specific design procedure for the smart unmanned aerial vehicle (UAV) fuel supply system which has been developed by Korean Aerospace Research Institute, and…

1826

Abstract

Purpose

To set‐up a specific design procedure for the smart unmanned aerial vehicle (UAV) fuel supply system which has been developed by Korean Aerospace Research Institute, and to design it preliminarily with the fuel system requirement and target reliabilities.

Design/methodology/approach

The fuel system layout and fuel tank were determined through consideration of total fuel volume, fuel flow rate, reliability, weight, centre of gravity, etc. In sizing of components such as booster pumps, jet pumps, piping system, vent subsystem, refuelling and defuelling subsystem, engine fuel flow requirement, pressure loss, component failure rate, weight and centre of gravity were considered. Finally, the reliability analysis of the preliminary designed fuel system was carried out.

Findings

According to the reliability analysis and weight estimation results, it was confirmed that the proposed fuel system agreed well with the design specifications and target reliabilities required by the vehicle system.

Research limitations/implications

In current preliminary design phase, the most important consideration is the reliability of the fuel system. Therefore, the weight estimation of the designed fuel system to meet this reliability requirement could not meet partially the system's requirements. In the next design step, the proper fuel system for weight reduction will be performed through an optimization process between weight and reliability.

Originality/value

A specific design procedure components' sizing to meet system requirement target reliability for UAV vertical take‐off/landing was proposed.

Details

Aircraft Engineering and Aerospace Technology, vol. 78 no. 3
Type: Research Article
ISSN: 0002-2667

Keywords

Article
Publication date: 1 June 1999

John Counsell Ian Porter David Dawson and Marcus Duffy

Introduces the need for engineering knowledge management tools for storing past solutions and expert knowledge for the design of automatic precision machinery. The design

1450

Abstract

Introduces the need for engineering knowledge management tools for storing past solutions and expert knowledge for the design of automatic precision machinery. The design of this type of machine, which is heavily utilised in modern manufacturing industry, is very complex, time‐consuming and potentially expensive. Describes the design and functionality of a novel computer aided rapid prototyping tool named Schemebuilder. The design is traced from its philosophical origins in the “Theory of domains” and how this can be used by the designer with the aid of the computer. The application of this underlining methodology for the design of precision machinery employing feedback control systems is also described. Finally an example is shown for the design of a control system for precise position control of a glass bottle making machine.

Details

Assembly Automation, vol. 19 no. 2
Type: Research Article
ISSN: 0144-5154

Keywords

Article
Publication date: 8 August 2022

Chengyao Xin

This paper aims to present a case study of virtual-reality-based product demonstrations featuring items of furniture. The results will be of use in further design and…

Abstract

Purpose

This paper aims to present a case study of virtual-reality-based product demonstrations featuring items of furniture. The results will be of use in further design and development of virtual-reality-based product demonstration systems and could also support effective student learning.

Design/methodology/approach

A new method was introduced to guide the experiment by confirming orthogonal arrays. User interactions were then planned, and a furniture demonstration system was implemented. The experiment comprised two stages. In the evaluation stage, participants were invited to experience the virtual-reality (VR)-based furniture demonstration system and complete a user experience (UX) survey. Taguchi-style robust design methods were used to design orthogonal table experiments and planning and design operation methods were used to implement an experimental display system in order to obtain optimized combinations of control factors and levels. The second stage involved a confirmatory test for the optimized combinations. A pilot questionnaire was first applied to survey demonstration scenarios that are important to customers.

Findings

The author found in terms of furniture products, product interactive display through VR can achieve good user satisfaction through quality design planning. VR can better grasp the characteristics of products than paper catalogs and website catalogs. And VR can better grasp the characteristics of products than online videos. For “interactive inspection”, “function simulation”, “style customization” and “set-out customization” were the most valuable demonstration scenarios for customers. The results of the experiment confirmed that the “overall rating”, “hedonic appeal” and “practical quality” were the three most important optimized operating methods, constituting a benchmark of user satisfaction.

Originality/value

The author found that it is possible to design and build a VR-based furniture demonstration system with a good level of usability when a suitable quality design method is applied. The optimized user interaction indicators and implementation experience for the VR-based product demonstration presented in this study will be of use in further design and development of similar systems.

Details

Library Hi Tech, vol. ahead-of-print no. ahead-of-print
Type: Research Article
ISSN: 0737-8831

Keywords

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