Dr Andrew Peter Longstaffa.p.longstaff@hud.ac.uk | 01484 472596
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.
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.
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 perturbations’ Precision Engineering , 37 (2), pp. 372-379. ISSN 0141-6359
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
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
Mian, N., Fletcher, S., Longstaff, A. and Myers, A. (2013) ‘The significance of air pockets for modelling thermal errors of machine tools’. In: Lamdamap 10th International Conference, 20th-21st March 2013, Buckinghamshire, UK
Parkinson, S. and Longstaff, A. (2012) ‘Increasing the Numeric Expressiveness of the Planning Domain Definition Language’ Proceedings 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
Li, F., Longstaff, A., Fletcher, S. and Myers, A. (2012) ‘Integrated Tactile-Optical Coordinate System for the Reverse Engineering of Complex Geometry’. In: 37th International Matador Conference, 25th-27th July 2012, Manchester, England
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 Systems’ Journal 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 Spindles’ Journal 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 study’ Expert 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 System’ Journal of Physics: Conference Series , 364, p. 012091. ISSN 1742-6596
Parkinson, S., Longstaff, A., Allen, G., Crampton, A., Fletcher, S. and Myers, A. (2011) ‘Hierarchical Task Based Process Planning For Machine Tool Calibration’ Proceedings of The 29th Workshop of the UK Planning and Scheduling Special Interest Group (PlanSIG2011) , pp. 53-60. ISSN 1368-5708
Rubio Rodriguez, L., Longstaff, A., Fletcher, S. and Myers, A. (2011) ‘Towards self-optimizing and self-adaptive milling processes’. In: Lamdamap 10th International Conference, 30th November - 1st Decemeber 2011, Chicheley Hall Chicheley, Chester, England
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 analysis’ Measurement 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
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
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
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 Machines’ Journal of the Japanese Society of Experimental Mechanics , 9 (Specia), pp. 77-80.
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
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
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
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 system’ Journal 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 calibration’ International Journal of Advanced Manufacturing Technology , 26 (5), pp. 457-465. ISSN 0268-3768
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 calibration’ International 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 space’ Machinery , 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 prediction’ International Journal of Advanced Manufacturing Technology , 24, pp. 794-805. ISSN 0268-3768
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 milling’ Key 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
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.
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
Longstaff, A., Freeman, J., Postlethwaite, S. and Ford, D. (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
We work closely with a large number of international companies, whose collaboration often brings up projects suitable for a doctoral project.
