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Publication
Featured researches published by Ian Cooper.
Journal of Computational Design and Engineering | 2017
Carmelo Mineo; S.G. Pierce; Pascual Ian Nicholson; Ian Cooper
Modern tools for designing and manufacturing of large components with complex geometries allow more flexible production with reduced cycle times. This is achieved through a combination of traditional subtractive approaches and new additive manufacturing processes. The problem of generating optimum tool-paths to perform specific actions (e.g. part manufacturing or inspection) on curved surface samples, through numerical control machinery or robotic manipulators, will be increasingly encountered. Part variability often precludes using original design CAD data directly for toolpath generation (especially for composite materials), instead surface mapping software is often used to generate tessellated models. However, such models differ from precise analytical models and are often not suitable to be used in current commercially available path-planning software, since they require formats where the geometrical entities are mathematically represented thus introducing approximation errors which propagate into the generated toolpath. This work adopts a fundamentally different approach to such surface mapping and presents a novel Mesh Following Technique (MFT) for the generation of tool-paths directly from tessellated models. The technique does not introduce any approximation and allows smoother and more accurate surface following tool-paths to be generated. The background mathematics to the new MFT algorithm are introduced and the algorithm is validated by testing through an application example. Comparative metrology experiments were undertaken to assess the tracking performance of the MFT algorithms, compared to tool-paths generated through commercial software. It is shown that the MFT tool-paths produced 40% smaller errors and up to 66% lower dispersion around the mean values.
41st Annual Review of Progress in Quantitative Nondestructive Evaluation Conference | 2015
Carmelo Mineo; S.G. Pierce; Ben Wright; Pascual Ian Nicholson; Ian Cooper
The requirement to increase inspection speeds for non-destructive testing (NDT) of composite aerospace parts is common to many manufacturers. The prevalence of complex curved surfaces in the industry provides significant motivation for the use of 6 axis robots for deployment of NDT probes in these inspections. A new system for robot deployed ultrasonic inspection of composite aerospace components is presented. The key novelty of the approach is through the accommodation of flexible robotic trajectory planning, coordinated with the NDT data acquisition. Using a flexible approach in MATLAB, the authors have developed a high level custom toolbox that utilizes external control of an industrial 6 axis manipulator to achieve complex path planning and provide synchronization of the employed ultrasonic phase array inspection system. The developed software maintains a high level approach to the robot programming, in order to ease the programming complexity for an NDT inspection operator. Crucially the approach pro...
Robotics and Computer-integrated Manufacturing | 2016
Carmelo Mineo; S.G. Pierce; Pascual Ian Nicholson; Ian Cooper
Insight | 2015
Carmelo Mineo; S.G. Pierce; Ben Wright; Ian Cooper; Pascual Ian Nicholson
Insight | 2013
Mark Sutcliffe; Miles Weston; Peter Charlton; Kelvin E. Donne; Ben Wright; Ian Cooper
51st Annual Conference of the British Institute for Non-Destructive Testing | 2013
Carmelo Mineo; Douglas Herbert; S.G. Pierce; Maxim Morozov; Ian Nicholson; Ian Cooper
Insight | 2013
D Yan; Mark Sutcliffe; Ben Wright; Ian Cooper
Composites Science and Technology | 2013
Ian Cooper; Ian Nicholson; Dawei Yan; Ben Wright; Dimos Liaptsis; Carmelo Mineo
6th International Symposium on NDT in Aerospace | 2014
Ian Cooper; Ian Nicholson; Dimos Liaptsis; Ben Wright; Carmelo Mineo
12th European Conference on Non-Destructive Testing | 2018
Jonathan Riise; Lance Farr; Martin Lindop; Gareth Pierce; P. Ian Nicholson; Ian Cooper