All Outputs (68)

Implementing large-scale Aerospace Assembly 4.0 demonstration systems? (2020)
Journal Article
Sanderson, D., Turner, A., Shires, E., Chaplin, J. C., & Ratchev, S. (2020). Implementing large-scale Aerospace Assembly 4.0 demonstration systems?. IFAC papers online, 53(2), 10267-10274. https://doi.org/10.1016/j.ifacol.2020.12.2759

The Future Automated Aerospace Assembly phase 1 technology Demonstrator (FA3D) was commissioned at the University of Nottingham and used to demonstrate concepts from the EPSRC Evolvable Assembly Systems project in specific industrial use cases. A num... Read More about Implementing large-scale Aerospace Assembly 4.0 demonstration systems?.

Aerospace Assembly Gap Measurement Using Low Cost Smart Tools with Machine Vision (2019)
Conference Proceeding
Crossley, R., & Ratchev, S. (2019). Aerospace Assembly Gap Measurement Using Low Cost Smart Tools with Machine Vision. In S. Ratchev (Ed.), Precision Assembly in the Digital Age: 8th IFIP WG 5.5 International Precision Assembly Seminar, IPAS 2018, Chamonix, France, January 14—16, 2018, Revised Selected Papers (158-168). https://doi.org/10.1007/978-3-030-05931-6_15

This paper details the conversion of mature machine vision technology from a fixed position automation line based device to a handheld technology and addresses the problems associated with maintaining a consistent camera distance and light source by... Read More about Aerospace Assembly Gap Measurement Using Low Cost Smart Tools with Machine Vision.

Tool Wear Classification using Time Series Imaging and Deep Learning (2019)
Journal Article
Martínez-Arellano, G., Terrazas, G., & Ratchev, S. (2019). Tool Wear Classification using Time Series Imaging and Deep Learning. International Journal of Advanced Manufacturing Technology, 104(9-12), 3647–3662. https://doi.org/10.1007/s00170-019-04090-6

Tool Condition Monitoring (TCM) has become essential to achieve high quality machining as well as cost-effective production. Identification of the cutting tool state during machining before it reaches its failure stage is critical. This paper present... Read More about Tool Wear Classification using Time Series Imaging and Deep Learning.

Towards an active learning approach to tool condition monitoring with Bayesian deep learning (2019)
Conference Proceeding
Martinez Arellano, G., & Ratchev, S. (2019). Towards an active learning approach to tool condition monitoring with Bayesian deep learning

With the current advances in the Internet of Things (IoT), smart sensors and Artificial Intelligence (AI), a new generation of condition monitoring solutions for smart manufacturing is starting to emerge. Computer Numerical Control (CNC) machines can... Read More about Towards an active learning approach to tool condition monitoring with Bayesian deep learning.

Demonstration of Transformable Manufacturing Systems through the Evolvable Assembly Systems Project (2019)
Journal Article
Sanderson, D., Turner, A., Shires, E., Chaplin, J., & Ratchev, S. (2019). Demonstration of Transformable Manufacturing Systems through the Evolvable Assembly Systems Project. SAE Technical Papers, Article 2019-01-1363. https://doi.org/10.4271/2019-01-1363

© 2019 SAE International. All Rights Reserved. Evolvable Assembly Systems is a five year UK research council funded project into flexible and reconfigurable manufacturing systems. The principal goal of the research programme has been to define and va... Read More about Demonstration of Transformable Manufacturing Systems through the Evolvable Assembly Systems Project.

Deployment of a distributed multi-agent architecture for transformable assembly (2018)
Conference Proceeding
Chaplin, J. C., & Ratchev, S. (2018). Deployment of a distributed multi-agent architecture for transformable assembly. In Precision assembly in the digital age (15-28). https://doi.org/10.1007/978-3-030-05931-6_2

Industry 4.0 represents a new philosophy in manufacturing systems, based on networked, intelligent, and cooperative resources. This revolution is necessary to make the cost-effective production of batch-size-of-one customised items in high-value manu... Read More about Deployment of a distributed multi-agent architecture for transformable assembly.

Towards a cloud-based analytics framework for assembly systems (2018)
Book Chapter
Terrazas, G., de Silva, L., & Ratchev, S. (2018). Towards a cloud-based analytics framework for assembly systems. In S. Ratchev (Ed.), Precision assembly in the digital age: 8th IFIP WG5.5 International Precision Assembly Seminar, IPAS 2108, Chamonix, France, January 14-16, 2018: revised selected papers, 134-141. Springer. doi:10.1007/978-3-030-05931-6_13

Advanced digitalization together with the rise of cloud technologies is a key enabler for a fundamental paradigm shift known as Industry 4.0 which pro-poses the integration of the new generation of ICT solutions for the monitoring, adaptation, simula... Read More about Towards a cloud-based analytics framework for assembly systems.

A Low-Cost Automated Fastener Painting Method Based on Machine Vision (2018)
Conference Proceeding
Zhao, R., Drouot, A., Griffin, J., Crossley, R., & Ratchev, S. (2019). A Low-Cost Automated Fastener Painting Method Based on Machine Vision. In S. Ratchev (Ed.), Precision Assembly in the Digital Age: 8th IFIP WG 5.5 International Precision Assembly Seminar, IPAS 2018, Chamonix, France, January 14—16, 2018, Revised Selected Papers (92-100). https://doi.org/10.1007/978-3-030-05931-6_9

Fastener painting of aerospace structures, in particular legacy products , relies heavily on the skill or rather craftsmanship of the human operator. This process is time-consuming while automated operations with industrial robots can be a more effic... Read More about A Low-Cost Automated Fastener Painting Method Based on Machine Vision.

Trade-off study of a variation aware determinate wing assembly against a traditional assembly strategy (2018)
Journal Article
Bacharoudis, K., Bakker, O. J., Popov, A., & Ratchev, S. (2018). Trade-off study of a variation aware determinate wing assembly against a traditional assembly strategy. MATEC Web of Conferences, 233, Article 00008. https://doi.org/10.1051/matecconf/201823300008

The present study introduces a trade-off framework to evaluate assembly concepts to make informed decisions for aircraft wing structures. This includes (1) the design of the assembly concepts and the estimation of the probability of achieving specifi... Read More about Trade-off study of a variation aware determinate wing assembly against a traditional assembly strategy.

Online Tool Wear Classification during Dry Machining Using Real Time Cutting Force Measurements and a CNN Approach (2018)
Journal Article
Terrazas, G., Martínez-Arellano, G., Benardos, P., & Ratchev, S. (2018). Online Tool Wear Classification during Dry Machining Using Real Time Cutting Force Measurements and a CNN Approach. Journal of Manufacturing and Materials Processing, 2(4), Article 72. https://doi.org/10.3390/jmmp2040072

The new generation of ICT solutions applied to the monitoring, adaptation, simulation and optimisation of factories are key enabling technologies for a new level of manufacturing capability and adaptability in the context of Industry 4.0. Given the a... Read More about Online Tool Wear Classification during Dry Machining Using Real Time Cutting Force Measurements and a CNN Approach.

OPTIMISED – Developing a State of the Art System for Production Planning for Industry 4.0 in the Construction Industry -Based Optimisation (2018)
Conference Proceeding
Teufl, S., Owa, K., Steinhauer, D., Castro, E., Herries, G., John, R., & Ratchev, S. (2018). OPTIMISED – Developing a State of the Art System for Production Planning for Industry 4.0 in the Construction Industry -Based Optimisation. In M. Peruzzini, M. Pellicciari, C. Bil, J. Stjepandić, & N. Wognum (Eds.), Transdisciplinary Engineering Methods for Social Innovation of Industry 4.0 : Proceedings of the 25th ISPE Inc. International Conference on Transdisciplinary Engineering, July 3 – 6, 2018 (731-740). https://doi.org/10.3233/978-1-61499-898-3-731

© 2018 The authors and IOS Press. Although it is not uncommon to have a predictive model of a factory, these models are often simplistic in nature. Such models rarely reflect the current operating performance of the system, use simple and separate da... Read More about OPTIMISED – Developing a State of the Art System for Production Planning for Industry 4.0 in the Construction Industry -Based Optimisation.

A Comparison of Centralised and Decentralised Scheduling Methods Using a Simple Benchmark System (2018)
Journal Article
Tochev, E., Pfifer, H., & Ratchev, S. (2018). A Comparison of Centralised and Decentralised Scheduling Methods Using a Simple Benchmark System. IFAC papers online, 51(11), 1287-1292. https://doi.org/10.1016/j.ifacol.2018.08.355

This paper is intended to provide a comparison of a centralised scheduling system, a simple Multi-Agent System (MAS), and a Mixed Integer Linear Programming (MILP) formulation. The systems are tested on a simulation of a small scale flexible job shop... Read More about A Comparison of Centralised and Decentralised Scheduling Methods Using a Simple Benchmark System.

Conceptual framework for ubiquitous cyber-physical assembly systems in airframe assembly (2018)
Conference Proceeding
Sanderson, D., Chaplin, J. C., & Ratchev, S. (2018). Conceptual framework for ubiquitous cyber-physical assembly systems in airframe assembly.

Current sectoral drivers for the manufacturing of complex products - such as airframe assembly -require new manufacturing system paradigms to meet them. In this paper, we propose a conceptual framework for cyber-physical systems driven by ubiquitous... Read More about Conceptual framework for ubiquitous cyber-physical assembly systems in airframe assembly.

Measurement assisted assembly for high accuracy aerospace manufacturing (2018)
Conference Proceeding
Drouot, A., Zhao, R., Irving, L., Sanderson, D., & Ratchev, S. (2018). Measurement assisted assembly for high accuracy aerospace manufacturing.

Measurement Assisted Assembly is a key concept for the modernisation of aerospace assembly processes, i.e. improving their efficiency while reducing the manufacturing costs. This concept suggests a paradigm shift in the assembly of high-complexity pr... Read More about Measurement assisted assembly for high accuracy aerospace manufacturing.

Common shared system model for evolvable assembly systems (2018)
Conference Proceeding
Sanderson, D., Chaplin, J., & Ratchev, S. (2018). Common shared system model for evolvable assembly systems.

A vital aspect of distributed control in an adaptable production system is coherence between each system resource. The Evolvable Assembly Systems project addresses this challenge using a common shared system model. This paper provides an overview of... Read More about Common shared system model for evolvable assembly systems.

Functional modelling in evolvable assembly systems (2018)
Conference Proceeding
Sanderson, D., Chaplin, J. C., & Ratchev, S. (2018). Functional modelling in evolvable assembly systems.

The design and reconfiguration of adaptive production systems is a key driver in modern advanced manufacturing. We summarise the use of an ap-proach from the field of functional modelling to capture the function, behaviour, and structure of a system.... Read More about Functional modelling in evolvable assembly systems.

Redesign methodology for mechanical assembly (2017)
Journal Article
El-Nounu, A., Popov, A., & Ratchev, S. (in press). Redesign methodology for mechanical assembly. Research in Engineering Design, https://doi.org/10.1007/s00163-017-0255-6

Design for assembly is the concept of carrying out critical thought early in the design stage to create assembly easement at the production stage. In the aerospace industry, products have very long lives, frequently being optimised rather than introd... Read More about Redesign methodology for mechanical assembly.

Development of in-situ monitoring systems for the thermoforming of pre-preg composite laminates (2016)
Conference Proceeding
Land, P., Branson, D. T., Crossley, R. J., & Ratchev, S. (2016). Development of in-situ monitoring systems for the thermoforming of pre-preg composite laminates.

Recent developments in automated composite manufacturing technologies, such as Automated Fibre Placement, AFP, and Automated Tape Layup, ATL, have enabled larger components to be produced efficiently, leading to an increased use of prepreg composites... Read More about Development of in-situ monitoring systems for the thermoforming of pre-preg composite laminates.

A multi-agent framework for capability-based reconfiguration of industrial assembly systems (2016)
Journal Article
Antzoulatos, N., Castro, E., de Silva, L., Rocha, A. D., Ratchev, S., & Barata, J. (in press). A multi-agent framework for capability-based reconfiguration of industrial assembly systems. International Journal of Production Research, https://doi.org/10.1080/00207543.2016.1243268

Rapidly changing market requirements and shorter product lifecycles demand assembly systems that are able to cope with frequently changing resources, resource capabilities and product specifications. This paper presents a multi-agent framework that c... Read More about A multi-agent framework for capability-based reconfiguration of industrial assembly systems.

Variation Aware Assembly Systems for Aircraft Wings (2016)
Conference Proceeding
Vaughan, D. R., Bakker, O. J., Branson, D. T., & Ratchev, S. (2016). Variation Aware Assembly Systems for Aircraft Wings. In SAE Technical Paper Series. https://doi.org/10.4271/2016-01-2106

Aircraft manufacturers desire to increase production to keep up with anticipated demand. To achieve this, the aerospace industry requires a significant increase in the manufacturing and assembly performance to reach required output levels. This work... Read More about Variation Aware Assembly Systems for Aircraft Wings.