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Portrait of Dr Andrew Peter Longstaff Dr Andrew Peter Longstaff

a.p.longstaff@hud.ac.uk | 01484 472596



Biography

Originally from County Durham, I gained a BSc in mathematics at Edinburgh University. I decided to convert my theoretical knowledge to applications in engineering and chose the MSc in “Engineering Control Systems and Metrology” at the University of Huddersfield, where I graduated with distinction in 1996.

As part of my studies I undertook a project on “Machine tool condition monitoring” for Professor Derek Ford, whose research team specialised in engineering control and machine performance. After the MSc I joined Professor Ford.s research group and by 2002 had completed a PhD entitled “Methods of Evaluation of the Positioning Capability of Cartesian and Non-Cartesian Machines.”

I have worked as a research fellow on several EPSRC grants, including “CAPM” which involved international industrial collaborators such as Cincinnati Machine Tools, Kistler Instruments, Newall Electronics, Renishaw plc, Siemens Automation and Drives and Independent Engineering Consultants. One of the outcomes of the project was a machine tool compensation system that has attracted global interest. As a result of these activities, the group has developed a comprehensive analytical and practical knowledge of machine tool control systems.

I am now a Senior Research Fellow in the Centre for Precision Technologies (CPT) at the University. As part of the University.s policy of improving teaching by encouraging research, I teach students at MSc level in “Manufacturing Systems Automation”, provide support for student projects and am director of studies for a number of PhD students.

Research & Scholarship

The research work we undertake in the CPT is driven by the needs of industry and takes us to many high-profile companies throughout the UK and abroad. My work concentrates on improving the output of manufacturing systems by analysing the equipment used to produce parts. My area of special interest is investigating the strategies for avoidance, measurement and correction of errors in CNC machine tools.

Our research group has a significant level of expertise in measurement and compensation of geometric, thermal, dynamic and load-dependent errors. I have been integral to the success of the University of Huddersfield.s Volumetric Compensation System (VCS), which can be used for compensating all the repeatable errors in machine tools.

I am currently undertaking research to determine the optimum process for machine measurement that will be able to take into account the combination of all the errors that affect positioning accuracy. One of the areas of interest this subject presents is to quantify the usefulness of the data when considering the uncertainty of the individual measurements.

Much of our work involves a need for non-standard measurements. Most of our tests use standard metrology equipment, such as laser interferometers, non-contact displacement transducers, precision levels, etc. However, exotic methods of applying this equipment can produce some interesting challenges. The majority of our acquired data requires comprehensive analysis, for which I use EXCEL, MATLAB or programs I write in Visual Basic.

Our team is well respected within industry for the technical ability we bring to measurement and process analysis. We provide training in the use of measurement equipment and educate machine users in the impact that errors can have on their production accuracy and efficiency.

Publications and Other Research Outputs

2014

Shagluf, A., Longstaff, A. and Fletcher, S. (2014) ‘Maintenance Strategies to Reduce Downtime Due to Machine Positional Errors’. In: Proceedings of Maintenance Performance Measurement and Management . Coimbra, Portugal: Department of Mechanical Engineering Pólo II · FCTUC. pp. 111-118. ISBN 978-972-8954-42-0

Abdulshahed , A., Longstaff , A. and Fletcher, S. (2014) ‘A novel approach for ANFIS modelling based on Grey system theory for thermal error compensation’. In: 14th UK Workshop on Computational Intelligence . Bradford, :UK: IEEE. . ISBN 978-1-4799-5538-1

Li, F., Longstaff, A., Fletcher, S. and Myers, A. (2014) ‘Rapid and accurate reverse engineering of geometry based on a multi-sensor systemInternational Journal of Advanced Manufacturing Technology , 74 (1-4), pp. 369-382. ISSN 0268-3768

Linares, J., Chaves-Jacob, J., Schwenke, H., Longstaff, A., Fletcher, S., Flore, J., Uhlmanne, E. and Winteringe, J. (2014) ‘Impact of measurement procedure when error mapping and compensating a small CNC machine using a multilateration laser interferometerPrecision Engineering , 38 (3), pp. 578-588. ISSN 0141-6359

Ford, D., Castaneda, V., Longstaff, A., Pislaru, C. and Myers, A. (2014) ‘Computer numerical control vertical machining centre feed drive modelling using the transmission line techniqueProceedings of the Institution of Mechanical Engineers Part C Journal of Mechanical Engineering Science , pp. 1-22. ISSN 09544062

Borisov, O., Fletcher, S., Longstaff, A. and Myers, A. (2014) ‘Performance evaluation of a new taut wire system for straightness measurement of machine toolsPrecision Engineering , 38 (3), pp. 492-498. ISSN 0141-6359

Simon, P., Andrew, L., Andrew, C. and Peter, G. (2014) ‘Automated Planning for Multi-Objective Machine Tool Calibration: Optimising Makespan and Measurement Uncertainty’. In: Twenty-Fourth International Conference on Automated Planning and Scheduling. Portsmouth, USA: Association for the Advancement of Arti?cial Intelligence AAAI. .

Shagluf, A., Parkinson, S., Longstaff, A. and Fletcher, S. (2014) ‘Towards an Optimization Calculation for Preventative and Reactive Calibration Strategies’. In: SDM'2014 International Conference on Sustainable Design and Manufacturing Cardiff, Wales, UK 28-30 April 2014. Cardiff, UK: KES International. pp. 83-94. ISBN 978-0-9561516-9-8

Chen, X., Longstaff, A., Fletcher, S. and Myers, A. (2014) ‘Deployment and evaluation of a dual-sensor autofocusing method for on-machine measurement of patterns of small holes on freeform surfacesApplied Optics , 53 (10), pp. 2246-2255. ISSN 1559-128X

Chen, X., Longstaff, A., Fletcher, S. and Myers, A. (2014) ‘Analysing and evaluating a dual-sensor autofocusing method for measuring the position of patterns of small holes on complex curved surfacesSensors and Actuators A: Physical , 210, pp. 86-94. ISSN 0924-4247

Parkinson, S., Longstaff, A. and Fletcher, S. (2014) ‘Automated planning to minimise uncertainty of machine tool calibrationEngineering Applications of Artificial Intelligence , 30, pp. 63-72. ISSN 0952-1976

Fletcher, S., Mian , N. and Longstaff, A. (2014) ‘Optimising temperature sensor placement for machine tool thermal error compensation’. In: EUSPEN Special Interest Group: Thermal Issues, 19-20 March 2014, Novotel Zurich City, Zurich, Switzerland

Longstaff, A., Fletcher, S., Parkinson, S. and Myers, A. (2014) ‘The Role of Measurement and Modelling of Machine Tools in Improving Product QualityInternational Journal of Metrology and Quality Engineering , 4 (03), pp. 177-184. ISSN 2107-6839

Chen, X., Longstaff, A., Parkinson, S. and Myers, A. (2014) ‘A Method for Rapid Detection and Evaluation of Position Errors of Patterns of Small Holes on Complex Curved and Freeform SurfacesInternational Journal of Precision Engineering and Manufacturing , 15 (2), pp. 209-217. ISSN 2234-7593

Ford, D., Widiyarto, M., Myers, A., Longstaff, A. and Fletcher, S. (2014) ‘Structural analysis and chracterisation technique applied to a CNC vertical machining centreJournal of Mechanical Engineering Science . ISSN 0954-4062

2013

Abuaniza, A., Fletcher, S. and Longstaff, A. (2013) ‘Thermal error modelling of a three axes vertical milling machine using Finite element analysis (FEA)’. In: Proceedings of Computing and Engineering Annual Researchers' Conference 2013 : CEARC'13. Huddersfield: University of Huddersfield. pp. 87-92. ISBN 9781862181212

Tansley, D., Fletcher, S. and Longstaff, A. (2013) ‘Smart sensor for surface temperature measurement on manufacturing machines’. In: Proceedings of Computing and Engineering Annual Researchers' Conference 2013 : CEARC'13. Huddersfield: University of Huddersfield. pp. 55-60. ISBN 9781862181212

Hatwesh, A., Fletcher, S. and Longstaff, A. (2013) ‘Precise Position Control of Machine Tool Feed Drives in the Presence of Load Perturbation’. In: Proceedings of Computing and Engineering Annual Researchers' Conference 2013 : CEARC'13. Huddersfield: University of Huddersfield. pp. 146-151. ISBN 9781862181212

Shagluf, A., Longstaff, A., Fletcher, S., Denton, P. and Myers, A. (2013) ‘The importance of assessing downtime cost related factors towards an optimised machine tool calibration schedule’. In: Proceedings of Computing and Engineering Annual Researchers' Conference 2013 : CEARC'13. Huddersfield: University of Huddersfield. pp. 182-187. ISBN 9781862181212

Alzarok, H., Fletcher, S., Longstaff, A. and Myers, A. (2013) ‘Assessment of the positioning accuracy of a small articulated robot during machining operations’. In: Proceedings of Computing and Engineering Annual Researchers' Conference 2013 : CEARC'13. Huddersfield: University of Huddersfield. pp. 106-111. ISBN 9781862181212

Li, F., Longstaff, A., Fletcher, S. and Myers, A. (2013) ‘A Practical Coordinate Unification Method for Integrated Tactile-Optical Measuring SystemOptics and lasers in engineering . ISSN 0143-8166

Abdulshahed, A., Longstaff, A., Fletcher, S. and Myers, A. (2013) ‘Application of GNNMCI(1, N) to environmental thermal error modelling of CNC machine tools’. In: The 3rd International Conference on Advanced Manufacturing Engineering and Technologies. Stockholm, Sweden : KTH Royal Institute of Technology. pp. 253-262. ISBN 9789175018928

Shagluf, A., Longstaff, A., Fletcher, S. and Denton, P. (2013) ‘Towards a Downtime Cost Function to Optimise Machine Tool Calibration Schedules’. In: Proceedings of the International Conference on Advanced Manufacturing Engineering and Technologies. Stockholm, Sweden: KTH Royal Institute of Technology. pp. 231-240. ISBN 9789175018935

Potdar, A., Longstaff, A., Fletcher, S. and Abdulshahed, A. (2013) ‘Development of modular machine tool structural monitoring system’. In: Proceedings of the International Conference on Advanced Manufacturing Engineering and Technologies. Stockholm: KTH Royal Institute of Technology. pp. 263-272. ISBN 978-91-7501-892-8

Shagluf, A., Longstaff, A., Fletcher, S., Denton, P. and Myers, A. (2013) ‘Predictive Calibration-Based Tolerance Boundaries For Arresting Deterioration of Machine Tool Accuracy’. In: 2nd Annual EPSRC Manufacturing the Future Conference, 17-18 September 2013, Cranfield University, UK

Li, F., Longstaff, A., Fletcher, S. and Myers, A. (2013) ‘Multiple-sensor integration for efficient reverse engineering of geometryProceedings of the 11th International Conference on Manufacturing Research , pp. 319-324. ISSN 978-1-907413-23-0

Borisov, O., Fletcher, S., Longstaff, A. and Myers, A. (2013) ‘New low cost sensing head and taut wire method for automated straightness measurement of machine tool axesOptics and lasers in engineering , 51 (8), pp. 978-985. ISSN 0143-8166

Rubio Rodriguez, L., De la Sen Parte, M., Longstaff, A. and Myers, A. (2013) ‘Analysis of discrete time schemes for milling forces control under fractional order holdsInternational Journal of Precision Engineering and Manufacturing , 14 (5), pp. 735-744. ISSN 2234-7593

Rubio Rodriguez, L., De la Sen Parte, M., Longstaff, A. and Fletcher, S. (2013) ‘Model-based Expert System to Automatically Adapt Milling Forces in Pareto Optimal Multi-Objective Working Points Expert Systems With Applications , 40 (6), pp. 2312-2322. ISSN 0957-4174

Mian, N., Fletcher, S., Longstaff, A. and Myers, A. (2013) ‘Efficient estimation by FEA of machine tool distortion due to environmental temperature perturbationsPrecision Engineering , 37 (2), pp. 372-379. ISSN 0141-6359

Ford, D., Myers, A., Haase, F., Lockwood, S. and Longstaff, A. (2013) ‘Active Vibration Control for a CNC Milling MachineProceedings of the Institute of Mechanical Engineering Part C, Journal of Mechanical Engineering Science . ISSN 0954-4062

Abdulshahed, A., Longstaff, A., Fletcher, S. and Myers, A. (2013) ‘Comparative study of ANN and ANFIS prediction models for thermal error compensation on CNC machine tools’. In: Proceedings of 10th International Conference and Exhibition on Laser Metrology, Machine Tool, CMM & Robotic Performance 2013. Buckinghamshire, UK: EUSPEN. .

Chen, X., Longstaff, A., Fletcher, S. and Myers, A. (2013) ‘Evaluation of measurement technique for a precision aspheric artefact using a nano-measuring machine ’. In: Lamdamap 10th International Conference, 20th-21st March 2013, Buckinghamshire, UK

Rubio Rodriguez, L., Longstaff, A., Fletcher, S. and Myers, A. (2013) ‘Towards self-optimizing and self-adaptive milling processes’. In: Lamdamap 10th International Conference, 20th-21st March 2013, Chicheley Hall Chicheley, Chester, England

Mian, N., Fletcher, S., Longstaff, A. and Myers, A. (2013) ‘The significance of air pockets for modelling thermal errors of machine tools’. In: Laser Metrology and Machine Performance X. Bedfordshire, UK: EUSPEN. pp. 189-198. ISBN 978-0-9566790-1-7

Chen, X., Longstaff, A., Fletcher, S. and Myers, A. (2013) ‘Evaluation of measurement technique for a precision aspheric artefact using a nano-measuring machine ’. In: Laser Metrology and Machine Performance X. Euspen Headquarters, Bedfordshire, MK43 0AL, UK: Euspen. pp. 357-364. ISBN 978-0-9566790-1-7

Li, F., Longstaff, A., Fletcher, S. and Myers, A. (2013) ‘Integrated Tactile-Optical Coordinate System for the Reverse Engineering of Complex Geometry’. In: Proceedings of the 37th International MATADOR Conference. : Springer. pp. 41-44. ISBN 9781447144793

2012

Parkinson, S. and Longstaff, A. (2012) ‘Increasing the Numeric Expressiveness of the Planning Domain Definition LanguageProceedings of The 30th Workshop of the UK Planning and Scheduling Special Interest Group (PlanSIG2012) .

Parkinson, S., Longstaff, A., Crampton, A. and Gregory, P. (2012) ‘The Application of Automated Planning to Machine Tool Calibration’. In: Proceedings of the 22nd International Conference on Automated Planning and Scheduling (ICAPS 2012). Atibaia, São Paulo, Brazil: ICAPS 2012. pp. 216-224. ISBN 9781577355625

Mian, N., Fletcher, S., Longstaff, A. and Myers, A. (2012) ‘An efficient offline method for determining the thermally sensitive points of a machine tool structure’. In: 37th International Matador Conference, 25th-27th July 2012, Manchester, England

Clough, D., Fletcher, S., Longstaff, A. and Willoughby, P. (2012) ‘Practical in-situ calibration method for the non-linear output from a low cost eddy current sensor’. In: 37th International Matador Conference, 25th-27th July 2012, Manchester, England

Parkinson, S., Longstaff, A., Crampton, A. and Gregory, P. (2012) ‘The Application of Automated Planning to Machine Tool Calibration’. In: Proceedings of the Twenty-Second International Conference on Automated Planning and Scheduling. California, USA: AAAI Press. pp. 216-224. ISBN 978-1-57735-562-5

Perkins, C., Longstaff, A., Fletcher, S. and Willoughby, P. (2012) ‘Practical Implementation of Machine tool Metrology and Maintenance Management SystemsJournal of Physics: Conference Series , 364, p. 012105. ISSN 1742-6596

Clough, D., Fletcher, S., Longstaff, A. and Willoughby, P. (2012) ‘Thermal Analysis for Condition Monitoring of Machine Tool SpindlesJournal of Physics: Conference Series , 364 (364). ISSN 1742-6596

Parkinson, S., Longstaff, A., Fletcher, S., Crampton, A. and Gregory, P. (2012) ‘Automatic planning for machine tool calibration: A case studyExpert Systems with Applications , 39 (13), pp. 11367-11377. ISSN 09574174

Li, F., Longstaff, A., Fletcher, S. and Myers, A. (2012) ‘Integrated Tactile and Optical Measuring Systems in Three Dimensional Metrology’. In: Proceedings of The Queen’s Diamond Jubilee Computing and Engineering Annual Researchers’ Conference 2012: CEARC’12. Huddersfield: University of Huddersfield. pp. 1-6. ISBN 978-1-86218-106-9

Parkinson, S., Longstaff, A., Crampton, A., Fletcher, S., Allen, G. and Myers, A. (2012) ‘Automation as a Solution for Machine Tool Calibration Planning’. In: Proceedings of The Queen’s Diamond Jubilee Computing and Engineering Annual Researchers’ Conference 2012: CEARC’12. Huddersfield: University of Huddersfield. pp. 57-62. ISBN 978-1-86218-106-9

Perkins, C., Longstaff, A., Fletcher, S. and Willoughby, P. (2012) ‘Rate-of-change analysis applied to machine tool monitoring and maintenance schedules’. In: Advanced Mathematical and Computational Tools in Metrology and Testing IX. London, UK: World Scientific. pp. 329-333. ISBN 9789814397940

Sztendel, S., Pislaru, C., Longstaff, A., Myers, A., Fletcher, S. and Ford, D. (2012) ‘Analysis of complex interactions between mechanical elements using ansys and simulink’. In: Proceedings of The Queen’s Diamond Jubilee Computing and Engineering Annual Researchers’ Conference 2012: CEARC’12. Huddersfield: University of Huddersfield. pp. 136-141. ISBN 978-1-86218-106-9

Parkinson, S., Longstaff, A., Crampton, A., Allen, G., Fletcher, S. and Myers, A. (2012) ‘The use of Cryptographic Principles within Metrology Software’. In: Advanced Mathematical and Computational Tools in Metrology and Testing. Singapore, China: World Scientific. pp. 292-296.

Sztendel, S., Pislaru, C., Longstaff, A., Fletcher, S. and Myers, A. (2012) ‘Five-Axis Machine Tool Condition Monitoring Using dSPACE Real-Time SystemJournal of Physics: Conference Series , 364, p. 012091. ISSN 1742-6596

2011

Parkinson, S., Longstaff, A., Allen, G., Crampton, A., Fletcher, S. and Myers, A. (2011) ‘Hierarchical Task Based Process Planning For Machine Tool CalibrationProceedings of The 29th Workshop of the UK Planning and Scheduling Special Interest Group (PlanSIG2011) , pp. 53-60. ISSN 1368-5708

Parkinson, S., Longstaff, A., Crampton, A., Fletcher, S., Allen, G. and Myers, A. (2011) ‘Representing the Process of Machine Tool Calibration in First-order Logic’. In: Proceedings of the 17th International Conference on Automation & Computing. Huddersfield, UK: Chinese Automation and Computing Society. . ISBN 978-1-86218-098-7

Li, F., Longstaff, A., Fletcher, S. and Myers, A. (2011) ‘A fast and effective way to improve the merging accuracy of multi-view point cloud data’. In: Proceedings of the 17th International Conference on Automation & Computing. Huddersfield, UK: Chinese Automation and Computing Society. pp. 18-21. ISBN 978-1-86218-098-7

Mian, N., Fletcher, S., Longstaff, A. and Myers, A. (2011) ‘Efficient thermal error prediction in a machine tool using finite element analysisMeasurement Science and Technology , 22 (8), p. 085107. ISSN 0957-0233

Perkins, C., Longstaff, A., Fletcher, S. and Willoughby, P. (2011) ‘Rate-of-change analysis applied to machine tool monitoring and maintenance schedules’. In: Advanced Mathematical and Computational Tools in Metrology (AMCTM) 2011, 20-23 June 2011, Gothenburg, Sweden

Parkinson, S., Longstaff, A., Crampton, A., Allen, G., Fletcher, S. and Myers, A. (2011) ‘The use of Cryptographic Principles within Metrology Software’. In: Advanced Mathematical and Computational Tools in Metrology (AMCTM) 2011, 20-23 June 2011, Gothenburg, Sweden

Borisov, O., Fletcher, S., Longstaff, A. and Myers, A. (2011) ‘Efficient machine error measurement ’. In: Yorkshire and North East Vitae Public Engagement Competition, 6 April 2011, Durham town hall, UK

Parkinson, S., Longstaff, A., Fletcher, S., Allen, G., Crampton, A. and Myers, A. (2011) ‘Controlling Machine Tool Accuracy Through a Robust Calibration Process ’. In: Yorkshire and North East Vitae Public Engagement Competition, 6th April 2011, Durham town hall

Feng, L., Longstaff, A., Fletcher, S. and Myers, A. (2011) ‘Integrated tactile-optical coordinate measuring system’. In: University of Huddersfield Annual Research Festival School of Computing and Engineering, March 2011, University of Huddersfield

Parkinson, S., Longstaff, A., Fletcher, S., Crampton, A., Allen, G. and Myers, A. (2011) ‘Cryptographic Techniques in Metrology Software’. In: University of Huddersfield Annual Research Festival School of Computing and Engineering 12th March 2010, Friday 12th March 2010, University of Huddersfield

2010

Borisov, O., Fletcher, S., Longstaff, A. and Myers, A. (2010) ‘Efficient Machine Error Measurement’. In: Future Technologies in Computing and Engineering: Proceedings of Computing and Engineering Annual Researchers' Conference 2010: CEARC’10. Huddersfield: University of Huddersfield. . ISBN 9781862180932

Perkins, C., Longstaff, A., Fletcher, S., Willoughby, P. and Verma, R. (2010) ‘Limitations of Data Handling within the Machine Tool Service environment’. In: Future Technologies in Computing and Engineering: Proceedings of Computing and Engineering Annual Researchers' Conference 2010: CEARC’10. Huddersfield: University of Huddersfield. p. 192. ISBN 9781862180932

Parkinson, S., Longstaff, A., Fletcher, S., Allen, G., Crampton, A. and Myers, A. (2010) ‘A novel framework for establishing a machine tool quality metric ’. In: Future Technologies in Computing and Engineering: Proceedings of Computing and Engineering Annual Researchers' Conference 2010: CEARC’10. Huddersfield: University of Huddersfield. . ISBN 9781862180932

Wright, D., Murgatroyd, S., Longstaff, A., Myers, A. and Fletcher, S. (2010) ‘Process control within an SME to increase output and achieve consistent manufacture of components’. In: Future Technologies in Computing and Engineering: Proceedings of Computing and Engineering Annual Researchers' Conference 2010: CEARC’10. Huddersfield: University of Huddersfield. . ISBN 9781862180932

Clough, D., Fletcher, S. and Longstaff, A. (2010) ‘Non-contact measurement and analysis of machine tool spindles ’. In: Future Technologies in Computing and Engineering: Proceedings of Computing and Engineering Annual Researchers' Conference 2010: CEARC’10. Huddersfield: University of Huddersfield. p. 189. ISBN 9781862180932

Willoughby, P., Verma, M., Longstaff, A. and Fletcher, S. (2010) ‘A Holistic Approach to Quantifying and Controlling the Accuracy, Performance and Availability of Machine Tools’. In: Proceedings of the 36th International MATADOR Conference. London, UK: Springer. pp. 313-316. ISBN 978-1-84996-431-9

Poxton, A., Longstaff, A., Barrans, S., Myers, A., Fletcher, S. and Pislaru, C. (2010) ‘Off-line investigation of machine tool non-rigid errors’. In: University of Huddersfield Annual Research Festival School of Computing and Engineering 12th March 2010, Friday 12th March 2010, University of Huddersfield

Mian, N., Fletcher, S., Longstaff, A., Myers, A. and Pislaru, C. (2010) ‘Novel and efficient thermal error reduction strategy for machine tool performance improvement’. In: University of Huddersfield Annual Research Festival School of Computing and Engineering 12th March 2010, Friday 12th March 2010, University of Huddersfield

Sztendel, S., Pislaru, C., Longstaff, A., Ford, D., Myers, A. and Poxton, A. (2010) ‘Linking fed drive model with structural models for CNC machine tools’. In: University of Huddersfield Annual Research Festival School of Computing and Engineering 12th March 2010, Friday 12th March 2010, University of Huddersfield

2009

Aldawi, F., Longstaff, A., Fletcher, S., Mather, P., Myers, A. and Briggs, J. (2009) ‘A Low-cost Ultrasonic 3D Measurement Device for Calibration for Cartesian and Non-Cartesian MachinesJournal of the Japanese Society of Experimental Mechanics , 9 (S), pp. 77-80. ISSN 1346-4930

Mian, N., Fletcher, S., Longstaff, A., Myers, A. and Pislaru, C. (2009) ‘Efficient offline thermal error modelling strategy for accurate thermal behaviour assessment of the machine tool.’. In: Proceedings of Computing and Engineering Annual Researchers' Conference 2009: CEARC’09. Huddersfield: University of Huddersfield. pp. 26-32. ISBN 9781862180857

Myers, A., Barrans, S., Longstaff, A., Fletcher, S. and Ford, D. (2009) ‘Evaluation and Comparison of a Large Machine Tool Structure with ISO Standard Alignment Tests’. In: Laser Metrology and Machine Performance. euspen headquarters, University of Cranfield: Euspen Ltd. pp. 57-66. ISBN 978-0-9553082-7-7

Aldawi, F., Longstaff, A., Fletcher, S., Pislaru, C., Myers, A. and Briggs, J. (2009) ‘A high accuracy ultrasonic system for measurement of air temperature’. In: Proceedings of the 9th International Conference - San Sebastian, Spain, 2009. : EUSPEN. pp. 134-137. ISBN 978-0-9553082-6-0

Longstaff, A., Fletcher, S., Poxton, A. and Myers, A. (2009) ‘Comparison of Volumetric Analysis Methods for Machine Tools with Rotary Axes’. In: Laser Metrology and Machine Performance. Euspen Headquarters, Cranfield University: Euspen Ltd. pp. 87-96. ISBN 978-0-9553082-7-7

Fletcher, S., Longstaff, A. and Myers, A. (2009) ‘Defining and Computing Machine Tool Accuracy’. In: Laser Metrology and Machine Performance. Euspen Headquarters, Cranfield University: Euspen Ltd. pp. 77-86. ISBN 978-0-9553082-7-7

Mian, N., Fletcher, S., Longstaff, A., Myers, A. and Pislaru, C. (2009) ‘Efficient Offline Thermal Modelling for Accurate Assessment of Machine Tool Thermal Behaviour’. In: Laser Metrology and Machine Performance. Euspen Headquarters, Cranfield University: Euspen. pp. 9-18. ISBN 978-0-9553082-7-7

Mian, N., Fletcher, S., Longstaff, A., Myers, A. and Pislaru, C. (2009) ‘Novel and Efficient Thermal Error Reduction Strategy For Machine Tool Performance Improvement’. In: University of Huddersfield Research Festival, 23rd March - 2nd April 2009, University of Huddersfield

2008

Aldawi, F., Longstaff, A., Fletcher, S., Mather, P. and Myers, A. (2008) ‘A Low Cost Ultrasonic 3D Measurement Device for Calibration for Cartesian and Non-Cartesian Machines’. In: Third International Symposium on Advanced Fluid/Solid Science and Technology in Experimental Mechanics ISEM 2008, 7th - 10th December 2008, National Cheng Kung University, Tainan, Taiwan , p. 61

Mian, N., Fletcher, S., Longstaff, A., Myers, A. and Pislaru, C. (2008) ‘Novel and efficient thermal error reduction strategy for machine tool performance improvement’. In: Proceedings of Computing and Engineering Annual Researchers' Conference 2008: CEARC’08. Huddersfield: University of Huddersfield. pp. 15-22. ISBN 978-1-86218-067-3

Poxton, A., Longstaff, A., Barrans, S., Myers, A., Fletcher, S. and Pislaru, C. (2008) ‘Simulation of the structural elements of a three axis VMC for machine tool error compensation’. In: Proceedings of Computing and Engineering Annual Researchers' Conference 2008: CEARC’08. Huddersfield: University of Huddersfield. pp. 23-27. ISBN 978-1-86218-067-3

Aldawi, F., Longstaff, A., Fletcher, S., Mather, P., Myers, A. and Briggs, J. (2008) ‘A multifrequency FM-based ultrasonic system for accuracy 3D measurement’. In: Proceedings of Computing and Engineering Annual Researchers' Conference 2008: CEARC’08. Huddersfield: University of Huddersfield. pp. 9-14. ISBN 978-1-86218-067-3

Myers, A., Pislaru, C., Longstaff, A. and Fletcher, S. (2008) ‘Machine Tool Accuracy and Real-Time Control’. In: Research Festival - School of Computing and Engineering Research Open Day, Friday 7th March 2008, University of Huddersfield

2007

Aldawi, F., Longstaff, A., Fletcher, S., Mather, P. and Myers, A. (2007) ‘A high accuracy ultrasound distance measurement system using binary frequency shift-keyed signal and phase detection’. In: Proceedings of Computing and Engineering Annual Researchers' Conference 2007: CEARC’07. Huddersfield: University of Huddersfield. pp. 1-7.

Longstaff, A., Fletcher, S. and Myers, A. (2007) ‘Flexible compensation of thermal errors’. In: EUSPEN Topical Meeting "Thermal Effects in Precision Engineering", 3 - 4 December 2007, Maastricht, The Netherlands , pp. 57-59

Fletcher, S., Longstaff, A. and Myers, A. (2007) ‘Measurement methods for efficient thermal assessment and error compensation’. In: EUSPEN Topical Meeting "Thermal Effects in Precision Engineering", 3 - 4 December 2007, Maastricht, The Netherlands , pp. 48-50

Poxton, A., Longstaff, A., Barrans, S., Myers, A., Fletcher, C. and Pislaru, C. (2007) ‘Analysis and reduction of machine tool non-rigid errors’. In: School of Computing and Engineering Annual Researchers’ Conference 2007, 14th December 2007, University of Huddersfield

Pislaru, C., Ford, D., Widiyarto, M., Longstaff, A. and Myers, A. (2007) ‘Hardware-in-the-loop implementation of modern CNC machine tool feed drive models’. In: 8th International LAMDAMAP Conference, 26 - 28 June 2007, Cardiff University , pp. 319-328

2005

Longstaff, A., Fletcher, S. and Myers, A. (2005) ‘Volumetric compensation of machine tools makes geometric errors negligible’. In: 3rd International Congress on Precision Machining, October 2005, Vienna, Austria , pp. 209-216

Fletcher, S., Longstaff, A. and Myers, A. (2005) ‘Practical compensation of all significant thermal errors in machine tools’. In: 3rd International Congress on Precision Machining, Vienna, Austria, October 2005, Vienna, Austria , p. 109 -117

Fletcher, S., Longstaff, A. and Myers, A. (2005) ‘Investigation into the accuracy of a proposed laser diode based multilateration machine tool calibration systemJournal Paper of Physics: Conference Series , 13, pp. 398-401. ISSN 1742-6588

Longstaff, A., Fletcher, S. and Myers, A. (2005) ‘Volumetric compensation for precision manufacture through a standard CNC controller’. In: 20th Annual Meeting of the American Society for Precision Engineering, 9th-14th October 2005, Norfolk, VA

Fletcher, S., Longstaff, A. and Myers, A. (2005) ‘Flexible modelling and compensation of machine tool thermal errors’. In: 20th Annual Meeting of American Society for Precision Engineering, 9th -14th October 2005, Norfolk, VA

Fletcher, S., Longstaff, A. and Myers, A. (2005) ‘Compensation of thermal errors on a small vertical milling machine’. In: Proceedings of the 7th International Conference and Exhibition on Laser Metrology, Machine Tool, CMM & Robotic Performance. : European Society for Precision Engineering and Nanotechnology. pp. 432-441. ISBN 1861941188

Longstaff, A., Fletcher, S. and Myers, A. (2005) ‘Volumetric error compensation through a Siemens controller’. In: Proceedings of the 7th International Conference and Exhibition on Laser Metrology, Machine Tool, CMM & Robotic Performance. : European Society for Precision Engineering and Nanotechnology. pp. 422-431. ISBN 1861941188

Widiyarto, M., Pislaru, C., Ford, D., Longstaff, A. and Myers, A. (2005) ‘Hybrid modelling technique applied to digital feed drives’. In: Proceedings of the 7th International Conference and Exhibition on Laser Metrology, Machine Tool, CMM & Robotic Performance. : European Society for Precision Engineering and Nanotechnology. pp. 454-463. ISBN 1861941188

Lui, X., Cheng, K., Longstaff, A., Widiyarto, M. and Ford, D. (2005) ‘Improved dynamic cutting force model in ball-end milling. Part 1: theoretical modelling and experimental calibrationInternational Journal of Advanced Manufacturing Technology , 26 (5), pp. 457-465. ISSN 0268-3768

2004

Liu, X., Cheng, K., Longstaff, A., Widiyarto, H. and Ford, D. (2004) ‘Improved dynamic cutting force model in ball-end milling. Part I: theoretical modelling and experimental calibrationInternational Journal of Advanced Manufacturing Technology , 26 (5-6), pp. 457-465. ISSN 0268-3768

Longstaff, A., Fletcher, S. and Ford, D. (2004) ‘Better accuracy speaks volumes: lost in spaceMachinery , pp. 14-16.

Liu, X., Cheung, K., Webb, D., Fiang, X., Xiao, S., Longstaff, A., Widiyarto, H. and Jiang, X. (2004) ‘Improved dynamic cutting force model in peripheral milling Part 2 Experimental verification and predictionInternational Journal of Advanced Manufacturing Technology , 24, pp. 794-805. ISSN 0268-3768

2003

Liu, X., Cheng, K., Webb, D., Jiang, X., Xiao, S., Longstaff, A., Widiyarto, H., Blunt, L. and Ford, D. (2003) ‘Experimental investigation of the machined surface waviness, vibrations and cutting forces in peripheral millingKey Engineering Materials, Advances in Abrasive Technology VI , pp. 213-218. ISSN 1013-9826

Longstaff, A (2003) ‘CNC machine tool volumetric accuracy performance’. In: 6th International LAMDAMAP Conference, 15th - 18th July 2003, University of Huddersfield

Liu, X., Cheng, K., Webb, D., Longstaff, A., Widiyarto, M., Jiang, X., Blunt, L. and Ford, D. (2003) ‘Prediction and compensation of machining error in ball end milling for microscale curved surface’. In: EUSPEN International Topical Conference, 19 - 20 May 2003, Aachen, Germany , p. 181 -184

Longstaff, A., Fletcher, S. and Ford, D. (2003) ‘Practical experience of thermal testing with reference to ISO 230 Part 3’. In: Laser Metrology and Machine Performance VI. Southampton: WIT Press. pp. 473-483. ISBN 9781853129902

Freeman, J., Longstaff, A. and Ford, D. (2003) ‘A general data logger for the measurement of the dynamics and the parameter estimation of machine tools’. In: Laser Metrology and Machine Performance VI. Southampton: WIT Press. pp. 569-578. ISBN 9781853129902

Liu, X., Cheng, K., Webb, D., Longstaff, A., Widiyarto, M., Jiang, X., Blunt, L. and Ford, D. (2003) ‘Investigation of the cutting force coefficients in ball-end milling’. In: Laser Metrology and Machine Performance VI. Southampton: WIT Press. pp. 45-54. ISBN 9781853129902

2002

Longstaff, A (2002) ‘An introduction to machine tool testing’. In: Dimensional Metrology Awareness Club, Gear Metrology Special Interest Group Meeting, June 2002, David Brown Textron Power Transmissions, Huddersfield

Longstaff, A (2002) Methods of evaluation of the positioning capability of Cartesian and non-Cartesian machines Doctoral thesis, University of Huddersfield.

2001

Longstaff, A (2001) ‘Volumetric Accuracy and Compensation’. In: 5th International LAMDAMAP Conference, 17 - 20 July 2001, University of Birmingham

Longstaff, A., Postlethwaite, S. and Ford, D. (2001) ‘Assessment of the volumetric accuracy of a machine with geometric compensation’. In: Laser Metrology and Machine Performance V. Southampton, UK: WIT. pp. 41-50. ISBN 9781853128905

1999

Ford, D., Longstaff, A., Freeman, J. and Postlethwaite, S. (1999) ‘Practical calibration of tracking laser systems’. In: 4th International Conference on Laser Metroogy and Machine Performance, 13 to 15 July 1999, Longhirst Hall, Northumberland , pp. 39-48

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