Imperial College London

ProfessorPeterChilds

Faculty of EngineeringDyson School of Design Engineering

Head of the School of Design Engineering
 
 
 
//

Contact

 

+44 (0)20 7594 7049p.childs Website CV

 
 
//

Location

 

Studio 1, Dyson BuildingDyson BuildingSouth Kensington Campus

//

Summary

 

Publications

Publication Type
Year
to

194 results found

Childs PRN, Turner AB, Vaughan CM, Rayner D, Bayley FJet al., 1992, Heat transfer to a rotating drum in an annulus with a stator blade row and axial throughflow. ASME Paper 92-GT-249, ASME Turbo Expo 1992, Publisher: ASME

CONFERENCE PAPER

Rayner D, Vaughan CM, Childs PRN, Turner ABet al., 1992, Numerical solution of the heat transfer in turbulent, swirling annular flows, Pages: 511-531

A numerical investigation into the heat transfer from a heated inner cylinder, rotating in an annulus with an axial throughflow of air, is presented. The finite difference solution algorithm incorporates the advantages of the SIMPLEC pressure-correction scheme with a Full Approximation Scheme (FAS) multigrid method. The increased efficiency allows a thorough numerical investigation to be undertaken.

CONFERENCE PAPER

Childs PRN, 1991, Heat Transfer at the surface of a cylinder rotating in an annulus with a stator blade row and axial throughflow

THESIS DISSERTATION

Baxter W, Aurisicchio M, Childs PRN, Tear Here: the Impact of Object Transformations on Proper Disposal, IAPRI 20th World Conference on Packaging

Efforts promoting proper disposal of packaging generally focus on infrastructure and messaging. Significantly less attention has been given to how the attributes of packaging can be used to change disposal behaviour. This research shows how changes in packaging attributes (e.g. alterations in shape, colour, or size) influence two disposal behaviours: recycling and littering. Specifically, we use an implicit association test to measure the subconscious tendency to categorize altered objects as trash rather than recycling. The results indicate that 82% or respondents showed at least a slight effect and 53% showed a strong effect towards associating altered objects with waste. Next, we evaluate object transformations on littering behaviour through an observational field study. Observations (N = 2823) indicated that littering is influenced by deformed, torn, disassembled, and partially full packaging. No significant effect was found with regard to packaging that is wet, sticky, has undergone colour changes or that is has remains (e.g. sauce) on it. These findings suggest that the (re)design of packaging can significantly influence proper disposal. Based on this, packaging can be (re)designed in two ways. First, many types of packaging have scripted alterations such as the iconic ‘tear here’ indicator. These can be changed to preserve properties associated with recyclables and non-littering. Second, packaging can be designed so that there are fewer alterations during use. This work can also help identify inherent attributes that encourage proper disposal.

CONFERENCE PAPER

Baxter W, Aurisicchio M, Mugge R, Childs Pet al., Decontaminating experiences with circular offerings, Product Lifetimes and The Environment (PLATE) 2017

CONFERENCE PAPER

Baxter W, Aurisicchio M, Mugge R, Childs Pet al., Decontaminating experiences with circular offerings, Product Lifetimes and The Environment (PLATE) 2017

CONFERENCE PAPER

Baxter W, Aurisicchio M, Mugge R, Childs PRNet al., Positive and negative contamination in user interactions, ICED17: 21st International Conference on Engineering Design, Publisher: Design Society

The purpose of this paper is to present contaminated interaction as a design construct. Interactions with an object can be altered,positively, neutrallyor negatively,due to some prior use. In such cases, the interaction departs from the designed condition and is said to be contaminated. This is particularly significant as objects, physical or non-physical, have multiple uses or are shared amongst users. We propose an ontological model of contaminated interaction based on a review of literature and an analysis of user experiences. The model outlines the process of contaminated interaction including the drivers and outcomes. In a negative context, contamination can lead to consumers misusing, negatively experiencing, or avoiding the object altogether. Positive contamination sees the opposite effect in which usability can increase, users report more positive experiences and users seek out or cherish the object. Together, this model presents an approach to understanding and addressing contamination in the design process to enable the creation and maintenance of meaningful experiences.

CONFERENCE PAPER

Childs PRN, Holloway M, Julia M, Folding mechanism for a remotely deployable robotic vehicle, International Symposium on Robotics

An innovative design for a folding robotic vehicle is presented that can deploy through small openings into crawl spaces and underfloor voids to survey and carry out operations within them. The mechanism employs a four bar linkage, enabling the axles to be extended away from the chassis and the axle to be deployed in line with the chassis, thus producing an elongated but small cross sectional area. In its low cross-sectional area form the device can be fed in through a small opening and once in position, the axles can be rotated into their functional position and locked in place. To remove the robot the mechanism works in reverse, with the axle is unlocked and rotated in line with the chassis This transformation is a key enabler for deployment and practical applications of this type of robot. The mechanism has been commercially developed and used for both survey and applying treatments in a wide range of building applications, although other uses are possible. This paper describes the practical aspects of the mechanism as an enabler for the transformation of a robot chassis for accessing confined spaces.

CONFERENCE PAPER

Childs PRN, Holloway M, Julia M, A robot for spray applied insulation in underfloor voids, 47th International Symposium on Robotics

This paper focuses on the application of robotics in a new field for applying surface treatments in building voids and thedevelopment of the architecture of the robotic vehicle for use in this application. The nature of the application means thatthe robotic vehicle must be capable of accessing voids through small openings and this has led to a deployable architecturefor the vehicle which can be fed through an opening and then reconfigures its form to enable practical operation. A typicalapplication for the robot is to apply thermal insulation to the underside of wooden or concrete floors in buildings. Theterrain is varied ranging from sand to impacted dusty hard core, can be strewn with builders’ debris such as bricks andtimber, and is interspersed with retainer walls that support the floor above. Within this environment the robot needs to beable to navigate and deploy a spray applied insulation fed by a hose assembly. This paper describes the robot architectureand its development with particular focus on deployable features enabling access to confined spaces, the traction systemused to negotiate diverse surfaces while pulling the umbilical hose assembly, the sensor array and how it is used to controlthe spray patterns. The resulting robots have been commercially developed, and are successfully spraying thermal insulationin a wide range of building applications.

CONFERENCE PAPER

Childs PRN, Julia M, Holloway M, Reinoso Oet al., Autonomous Surveying of Underfloor Voids, 47th International Symposium on Robotics

In this paper, a novel robotic system that solves the problem of autonomous mapping an underfloor void is presented. The approach is based on a 3D laser scanner. A real time navigation system and a new high level planner that selects the next best scanning position controls the motion of the robot. Multiple scans are aligned using ICP and graph optimization techniques. Finally, a point cloud fusion algorithm creates a global model of the environment from the aligned scans. The survey robot has been successfully deployed in a commercial application for scanning underfloor voids before and after the application of thermal insulation. Using this system, the robot was successfully able to autonomously map the controlled test scenario. For some applications the quantity of rubble within the void caused the real time navigation to fail and teleoperation and manual initialization of the ICP algorithm was necessary.

CONFERENCE PAPER

Childs PRN, Michalakoudis I, Harding J, Using functional analysis diagrams for production cost optimization, IEEE-ICAMSE 2016

This paper presents a methodology combining Failure Modeand Effects Analysis (FMEA) and Value Engineering (VE),assisted by a set of hierarchical Functional Analysis Diagram(FAD) models, and its pilot introduction in a UK-basedmanufacturing Small Medium Enterprise (SME). Theproposed methodology suggests the parallel execution of bothprocesses, using a combination of FAD models and the FMEAtabular tool to yield results for both FMEA and VE. Theresulting Risk Priority Number (RPN) is used to identify andprioritize not only the high-risk components requiringimprovements (highest RPN values), but also the potentiallysuperfluous components (lowest RPN values) that could besafely downgraded to reduce unnecessary costs.

CONFERENCE PAPER

Garvey B, Childs P, DESIGN AS AN UNSTRUCTURED PROBLEM: NEW METHODS TO HELP REDUCE UNCERTAINTY – A PRACTITIONER PERSPECTIVE in Impact of Design Research in Industrial Practice Eds A Chakrabarti and U Lindemann Springer 2016, Impact of Design Research on Industrial Practice

JOURNAL ARTICLE

Lee S, Jiang P, Childs P, Gilroy Ket al., Functional Analysis Diagrams with the representation of movement transitions, ASME 2013 International Mechanical Engineering Congress and Exposition, IMECE 2013

A study on utilising a graphical interface to representmovement transmission within products has been conducted tosupport a creative conceptual design process that separates theconsideration of functional requirements and motionrequirements. In engineering design, many representations ofproduct structure have been proposed to assist in understandinghow a design is constituted. However, most of theserepresentations demonstrate only functions and are not able todemonstrate design structure. Functional Analysis Diagrams(FAD) provides a solution for this. An FAD shows not onlyfunctions but also physical elements by the network of blocksand arrows and thus it is capable of demonstrating varioustypes of information and the design scheme. This characteristicgives FADs an advantage for designers to combine differenttypes of information including useful and harmful interactionsto gain an overview of the design task. This study focuses onusing circles instead of arrows to represent movement attributesof mechanisms and machine elements in a KinematicFunctional Analysis Diagram (KFAD) and explores methods ofutilising it in mechanical design. A commercial case study ofmedical equipment design conducted with the assistance ofKFADs and a component database, mechanism and machineelements taxonomy (MMET), is described to illustrate theprocess. The design outcome shows that it is feasible to followthe proposed conceptual design process. With the help ofKFADs and the machine elements taxonomy to enableconsideration of movements, diverse considerations and designsolutions are possible.

CONFERENCE PAPER

Sikhwal RK, Childs PRN, Innovation toolkit for identification of the optimal module options in open platform architecture products, NordDesign 2018, Publisher: Design Society

Open platform architecture products (OPAP) are the keyenablers for Product designfor Mass Individualisation.Itis a new product design paradigm that comprises an open hardware platform, mass-producedby large manufacturersand multiple independent modules,invented and produced by other smaller companies and by the end-userthat are integratedwith the platform. It gives freedom to end-usersto integrate different modules into the platform as per their choice. This type of product integration will be engaged with by the all actors involved in the design and aims to help them to be more creative and innovative. The end product will be highly individualised and technologically advanced.Based on explorative literature analysis, with practical insights from an industrial questionnaire survey, anInnovation toolkitfor the end-userhas beendeveloped.TheInnovation toolkitprovides a mean of selecting an optimal module option for each module which will be integrated onthe hardware platform. The design of theInnovation toolkitfor OPAP has been approachedin three different steps: Modelling of OPAP, Modelling of evaluation measures and evaluation indices with end-userpreferences and Identification of the optimal module options. In this work, variations in module options for a given module are modelledby an AND-OR tree and parameters of the nodes in this tree. Different module options for the selected module are evaluated by various evaluation measures. These evaluation measures are convertedinto comparable customer satisfaction indices. The optimal OPAP is identifiedby constrained optimisationof the overall customer satisfaction index. Twocase studieshavebeen presented to demonstrate theeffectiveness of the introduced Innovation toolkit.These case studies illustrate that the Innovation toolkit can readily be appliedto these typesof product developmentto obtain a highly individualised OPAP with optimised mo

CONFERENCE PAPER

This data is extracted from the Web of Science and reproduced under a licence from Thomson Reuters. You may not copy or re-distribute this data in whole or in part without the written consent of the Science business of Thomson Reuters.

Request URL: http://wlsprd.imperial.ac.uk:80/respub/WEB-INF/jsp/search-html.jsp Request URI: /respub/WEB-INF/jsp/search-html.jsp Query String: id=00452804&limit=30&person=true&page=7&respub-action=search.html