Dr Patrick Harkness

  • Senior Lecturer (Systems Power and Energy)

telephone: 0141 330 3233
email: Patrick.Harkness@glasgow.ac.uk

Research interests

Biography

Patrick Harkness is from Ballyclog, in Co. Tyrone. Patrick obtained a MEng degree in Aeronautical Engineering from The Queen’s University of Belfast in 2003 and a PhD in space debris mitigation from Cranfield University in 2007. He then worked with Lockheed Martin on the subject of magnetohydrodynamic flow control before taking up a postdoctoral role at the University of Glasgow, focusing on ultrasonics, in 2008. He is now an academic in Engineering.

Patrick is a Fellow of the IMechE and the RAS, and works with the Space Architecture Technical Committee. 

Research Interests

Patrick's main research interests are in access and exploration technology for hazardous or difficult environments. These environments tend to be found on planetary surfaces and in outer space. 

On planetary surfaces, Patrick has an interest in sample acquisition. He has worked to create robotic devices with self-assembling drillstrings that can take and containerise rock samples, and demonstrated their autonomous drilling performance at Mars analogue sites. Now, in 2018, Patrick has a collaboration with researchers at the British Antarctic Survey which seeks to deploy a subglacial bedrock sampling tool - currently being cold-tested - to the Skytrain Ice Rise in Antarctica. The rock samples we hope to obtain from under the ice sheet will help to validate global climate models.

These technological developments are underpinned by research, and a particular fundamental interest is the behaviour of granular materials. Patrick's work in this field considers how such materials respond to ultrasonic vibration, and his team has shown that fluidisation can occur even when extremely low vibration amplitudes are applied. This has been used to reduce the force required by simple penetrators by an order of magnitude, and tests in centrifuges (at ESTEC) have indicated that the phenomenon exists over a wide range of apparent gravities. This could help us to explore the soil of asteroids and planets in the future.

In space itself, Patrick is particularly interested in deployable structures: ones that become much larger once they have been safely placed in space. The Aeoldos deployable system is a baseline capability for drag augmentation in low earth orbit, for the purposes of space debris mitigation, but also provides a technology start-point for solar sails and antennae.

Again, the underpinning research is important. Patrick has published a number of papers that discuss the descent of satellites through the Earth's atmosphere, and an area of particular interest is the dependency of lifetime against multiple solar cycles. Another novel concept is free altitude control: by synchronising orbital period with the frequency of a heliostable solar sail, it is possible to change orbital altitude with a very limited control budget.

Finally, Patrick is interested in access to space. With collaborators at Dnipro National University in Ukraine, he has just published a paper that describes - the authors think for the first time - the test-firing of a solid rocket that can be throttled up and down, on demand. This motor, the autophage motor, has a unique property: it consumes a solid rod of propellant longitudinally, rather than by simply burning it from one end, or from the inside out. Because a rocket using such an engine would not require a structural body to contain the propellant, there exists the possibility that it could be much more mass-efficient. This could enable a new class of smaller and more effective launch vehicles in the future - an exciting possibility that has seen our autophage concept discussed in high-impact settings such as Science, the Economist, and the Register.


Grants

Research funding obtained over the past several years includes the following:

 

Knowledge Transfer

Mars Sample Return to Terrestrial Polar Science (PI)

UK Space Agency, July 2017, £99k (University of Glasgow component £56k)

 

EU H2020 Advanced Capabilities

Robot for Autonomous Underground Trenchless Operations, Mapping and Navigation (PI)

European Commission, July 2016, £3.18m (University of Glasgow component £481k)

 

Technology Proof of Concept

Subglacial Bedrock Sampler (PI)

Natural Environment Research Council, May 2016, £138k (University of Glasgow component £119k)

 

Spin Your Thesis

Team Dynamics (PI)

European Space Agency, June 2015, £2k

 

Historic Scotland

Sensing and understanding the resilience of sandstones (CoI)

Historic Scotland, June 2014, £36k

 

NSTP Design Study follow-on

Wideband Ionospheric Sounder CubeSat Experiment III (PI)

DSTL/University of Birmingham, April 2014, £1k

 

Research Contract

Large Scale Project for Petroleum (PETROMAKS II) (CoI)

Badger Explorer ASA, April 2014, £25k

 

EU FP7 Space

Ultrasonic Planetary Core Drill (PI)

European Commission, January 2014, £1.96m (University of Glasgow component £723k)

 

Aurora Studentship

Atmosphere-crust coupling and carbon sequestration on the young Mars (CoI)

UK Space Agency, July 2013, £85k


Supervision

I currently (2018) work with two postdoctoral researchers and two PhD students. Hopefully, a third PhD is just about to start.


Teaching

Patrick's courses include the following:

 

Dynamics 3

Patrick's material on this course examines the behaviour of free and forced vibrating systems, considering the effects of friction, damping and resonance.

 

Vibration 4

Patrick's work on this course focusses on the practicalities of vibration analysis, especially hardware and signal processing.

 

Space Systems 2

This course provides an introduction to key spacecraft subsystems, as well as the space environment and space law.


Publications

List by: Type | Date

Jump to: 2018 | 2017 | 2016 | 2015 | 2014 | 2013 | 2012 | 2011 | 2010 | 2009 | 2008 | 2007 | 2006
Number of items: 63.

2018

Yemets, V., Harkness, P., Dron, M., Pashkov, A., Worrall, K. and Middleton, M. (2018) Autophage engines: towards a throttleable solid motor. Journal of Spacecraft and Rockets, (doi:10.2514/1.A34153) (Early Online Publication)

Firstbrook, D. , Worrall, K., Timoney, R. and Harkness, P. (2018) Ultrasonically Assisted Hammer-Action Penetrators in Planetary Regolith. ASCE Earth and Space Conference, Cleveland, OH, USA, 10-13 Apr 2018.

Timoney, R., Worrall, K., Firstbrook, D. and Harkness, P. (2018) Development of a Heuristic Thermal Control System for the Ultrasonic Planetary Core Drill. ASCE Earth and Space Conference, Cleveland, OH, USA, 10-13 Apr 2018.

Worrall, K., Timoney, R., Li, X., Harkness, P. and Lucas, M. (2018) UPCD: Field Trial Results and Further Work. In: 16th Biennial ASCE International Conference on Engineering, Science, Construction and Operations in Challenging Environments, Cleveland, Ohio, 09-12 Apr 2018, (Accepted for Publication)

Firstbrook, D. G. , Harkness, P., Li, X., Timoney, R. and Worrall, K. (2018) Ultrasonically-assisted penetration of granular and cemented materials. In: Badescu, V. and Zacny, K. (eds.) Outer Solar System: Prospective Energy and Material Resources. Springer International Publishing, pp. 261-268. ISBN 9783319738444 (doi:10.1007/978-3-319-73845-1_7)

2017

Morgan, L. E., Munk, M., Davidheiser-Kroll, B., Warner, N. H., Gupta, S., Slaybaugh, R., Harkness, P. and Mark, D. F. (2017) Instrumentation development for planetary in situ 40Ar/39Ar geochronology. Geostandards and Geoanalytical Research, 41(3), pp. 381-396. (doi:10.1111/ggr.12170)

Worrall, K., Timoney, R., Harkness, P., Li, X. and Lucas, M. (2017) Ultrasonic Planetary Core Drill: Overview and Results from Field Trial. 14th Symposium on Advanced Space Technologies in Robotics and Automation, Leiden, The Netherlands, 20-22 Jun 2017.

Chen, X., Yao, W. and Harkness, P. (2017) Pocketqube Deorbit Times: Susceptibility to the Solar Cycle. In: 2017 IEEE Aerospace Conference, Big Sky, MT, USA, 4-11 Mar 2017, pp. 1-12. ISBN 9781509016136 (doi:10.1109/AERO.2017.7943625)

Li, D., Harkness, P. and Walkinshaw, T. (2017) Design of a Solar Panel Deployment and Tracking System for Pocketqube Pico-Satellite. In: 2017 IEEE Aerospace Conference, Big Sky, MT, USA, 4-11 Mar 2017, (doi:10.1109/AERO.2017.7943910)

Feeney, A., Sikaneta, S., Harkness, P. and Lucas, M. (2017) Ultrasonic compaction of granular geological materials. Ultrasonics, 76, pp. 136-144. (doi:10.1016/j.ultras.2017.01.004) (PMID:28088705)

Payler, S. J. et al. (2017) Planetary science and exploration in the deep subsurface: results from the MINAR Program, Boulby Mine, UK. International Journal of Astrobiology, 16(2), pp. 114-129. (doi:10.1017/S1473550416000045)

Li, X., Harkness, P., Worrall, K., Timoney, R. and Lucas, M. (2017) A parametric study for the design of an optimized ultrasonic-percussive planetary drill tool. IEEE Transactions on Ultrasonics, Ferroelectrics, and Frequency Control, 64(3), pp. 577-589. (doi:10.1109/TUFFC.2016.2633319) (PMID:27913339)

Firstbrook, D. , Worrall, K., Timoney, R., Suñol, F., Gao, Y. and Harkness, P. (2017) An experimental study of ultrasonic vibration and the penetration of granular material. Proceedings of the Royal Society of London Series A: Mathematical, Physical and Engineering Sciences, 473(2198), 20160673. (doi:10.1098/rspa.2016.0673)

Felicetti, L., Harkness, P. and Ceriotti, M. (2017) Attitude and Orbital Dynamics of a Variable-Geometry, Spinning Solar Sail in Earth Orbit. In: Fourth International Symposium on Solar Sailing (ISSS 2017), Kyoto, Japan, 17-20 Jan 2017,

Firstbrook, D. G. , Worrall, K., Doherty, P., Timoney, R., Harkness, P. and Suñol, F. (2017) Ultrasonic Penetration of Granular Materials in Varying Gravity. In: ASCE Earth and Space Conference, Orlando, FL, USA, 11-15 Apr 2016, ISBN 9780784479971

Timoney, R., Li, X., Worrall, K., Firstbrook, D. G. , Harkness, P. and Lucas, M. (2017) Push-and-Twist Drillstring Assemblies. In: ASCE Earth and Space Conference, Orlando, FL, USA, 11-15 Apr 2016, ISBN 9780784479971

2016

Feeney, A., Sikaneta, S., Harkness, P. and Lucas, M. (2016) An ultrasonic compactor fol oil and gas exploration. Physics Procedia, 87, pp. 72-78. (doi:10.1016/j.phpro.2016.12.012)

Macartney, A., Li, X. and Harkness, P. (2016) Meet the MOUSE (Micro-Optic Ultrasonic Exfoliator): Mars Rover Rock Abrasion Tool (RAT) Performance Enhanced by Ultrasonic Technology. AGU Fall Meeting, San Francisco, CA, USA, 12-16 Dec 2016.

Dassow, J., Lee, M. , Li, X., Harkness, P., Hild, S., Naylor, L. and Leslie, A. (2016) New Approaches to Assess Weathering of Sandstone. In: 2016 Materials Research Society Fall Meeting & Exhibit, Boston, MA, USA, 27 Nov - 2 Dec 2016,

Felicetti, L., Ceriotti, M. and Harkness, P. (2016) Attitude stability and altitude control of a variable-geometry Earth-orbiting solar sail. Journal of Guidance, Control, and Dynamics, 39(9), pp. 2112-2126. (doi:10.2514/1.G001833)

Timoney, R., Worrall, K., Li, X., Firstbrook, D. G. , Harkness, P. and Lucas, M. (2016) Preliminary Testing of the European Ultrasonic Planetary Core Drill (UPCD) in Simulated Permafrost Terrain as a Precursor to Arctic Field Trials. 13th International Planetary Probe Workshop, Maryland, USA, 13-17 Jun 2016.

Firstbrook, D. , Worrall, K., Timoney, R., Harkness, P., Suñol, F. and Gao, Y. (2016) Ultrasonically Assisted Penetration Through Granular Materials. 13th International Planetary Probe Workshop, Laurel, MD, USA, 13-17 Jun 2016.

Dassow, J., Li, X., Harkness, P., Hild, S., Leslie, A., Naylor, L. and Lee, M. (2016) Sandstone Weathering: New Approaches to Assess Building Stone Decay. In: 13th International Congress on the Deterioration and Conservation of Stone, Paisley, Scotland, 6-10 Sept 2016, p. 642.

2015

Firstbrook, D. G. , Doherty, P., Timoney, R., Harkness, P. and Suñol, F. (2015) Preparations for Variable-Gravity Regolith Penetration with an Ultrasonically-Active Probe. In: 12th International Planetary Probe Workshop, Cologne, Germany, 15-19 June 2015,

Firstbrook, D. G. , Harkness, P. and Gao, Y. (2015) Power Optimisation for an Ultrasonic Penetrator in Granular Materials. In: AIAA Space 2015 Conference, Pasadena, CA, USA, 31 Aug - 2 Sept 2015, (doi:10.2514/6.2015-4555)

Li, X., Worrall, K., Harkness, P., Timoney, R. , Bolhovitins, A. and Lucas, M. (2015) A Motion Control System Design for an Ultrasonic Planetary Core Drill (UPCD) Unit. In: AIAA Space 2015 Conference, Pasadena, CA, USA, 31 Aug - 2 Sept 2015, ISBN 9781624103346

Timoney, R., Harkness, P., Worrall, K., Li, X., Bolhovitins, A. and Lucas, M. (2015) European Ultrasonic Planetary Core Drill. In: 12th International Planetary Probe Workshop, Cologne, Germany, 15-19 June 2015,

Timoney, R., Harkness, P., Worrall, K., Li, X., Bolhovitins, A., Cheney, A. and Lucas, M. (2015) The Development of the European Ultrasonic Planetary Core Drill (UPCD). In: AIAA Space 2015 Conference, Pasadena, CA, USA, 31 Aug - 2 Sept 2015, ISBN 9781624103346

2014

Ceriotti, M. , Harkness, P. and McRobb, M. (2014) Synchronized orbits and oscillations for free altitude control. Journal of Guidance, Control, and Dynamics, 37(6), pp. 2062-2066. (doi:10.2514/1.G000253)

Harkness, P., McRobb, M., Lützkendorf, P., Milligan, R., Feeney, A. and Clark, C. (2014) Development status of AEOLDOS - a deorbit module for small satellites. Advances in Space Research, 54(1), pp. 82-91. (doi:10.1016/j.asr.2014.03.022)

Ceriotti, M. , Harkness, P. and McRobb, M. (2014) Orbital Dynamics of Synchronised Orbit-Attitude Oscillations under Solar Radiation Pressure. In: 65th International Astronautical Congress, Toronto, ON, Canada, 29 Sep - 3 Oct 2014,

Ceriotti, M. , Harkness, P. and McRobb, M. (2014) Variable-geometry solar sailing: the possibilities of the quasi-rhombic pyramid. In: Macdonald, M. (ed.) Advances in Solar Sailing. Series: Springer Praxis Books: Astronautical Engineering. Springer in association with Praxis Publishing, pp. 899-919. ISBN 9783642349065 (doi:10.1007/978-3-642-34907-2_54)

Firstbrook, D. G. , Harkness, P. and Gao, Y. (2014) A novel study on high-powered ultrasonic penetrators in granular material. In: AIAA Space 2014 Conference, San Diego, CA, USA, 4-7 Aug 2014, ISBN 9781624102578 (doi:10.2514/6.2014-4265)

Harkness, P., McRobb, M., Loh, Y., Hyde, M. and Lucas, M. (2014) A rock-coring campaign in an analogue environment: performance, lessons and development. In: AIAA Space 2014 Conference, San Diego, CA, USA, 4-7 Aug 2014, (doi:10.2514/6.2014-4264)

Harkness, P., McRobb, M., Milligan, R. and Clark, C. (2014) Deployment dynamics of AEOLDOS: an aerodynamic end of life deOrbit system for CubeSats. In: AIAA Space 2014 Conference, San Diego, CA, USA, 4-7 Aug 2014, (doi:10.2514/6.2014-4340)

Morgan, L., Davidheiser-Kroll, B., Munk, M., van Bibber, K., Harkness, P., Lee, M., Wright, I., Gupta, S. and Mark, D. (2014) Instrumentation development for planetary in situ 40Ar/39Ar geochronology. In: Goldschmidt Conference, Sacramento, CA USA, 8-13 June 2014,

2013

Al-Budairi, H. , Lucas, M. and Harkness, P. (2013) A design approach for longitudinal–torsional ultrasonic transducers. Sensors and Actuators A: Physical, 198, pp. 99-106. (doi:10.1016/j.sna.2013.04.024)

Angling, M., Harkness, P., McRobb, M., Vasile, M. and Sinn, T. (2013) The wideband ionospheric sounder cubesat experiment. In: The International Beacon Satellite Symposium, London, UK, 8-12 Jul 2012,

2012

Harkness, P. and Lucas, M. (2012) A brief overview of space applications for ultrasonics. Ultrasonics, 52(8), pp. 975-979. (doi:10.1016/j.ultras.2012.09.004)

Harkness, P., Lucas, M. and Cardoni, A. (2012) Coupling and degenerating modes in longitudinal–torsional step horns. Ultrasonics, 52(8), pp. 980-988. (doi:10.1016/j.ultras.2012.05.002)

Al-Budairi, H. , Harkness, P. and Lucas, M. (2012) Drill Tools for Earth and space design of a novel longitudinal-torsional ultrasonic transducer. InFocus Magazine, 2, pp. 6-7.

Al-Budairi, H. , Lucas, M. and Harkness, P. (2012) Optimisation of the longitudinal-torsional output of a half-wavelength Langevin transducer. In: 41st Annual Symposium of the Ultrasonic Industry Association, San Francisco, CA, USA, 16-18 Apr 2012,

Al-Sarraf, Z., Lucas, M. and Harkness, P. (2012) A numerical and experimental study of ultrasonic metal welding. In: International Symposium on Ultrasound in the Control of Industrial Processes (UCIP 2012), Madrid, Spain, 18-20 April 2012, 012015. (doi:10.1088/1757-899X/42/1/012015)

Harkness, P. and Lucas, M. (2012) Development of a switchable system for longitudinal and longitudinal-torsional vibration extraction. In: 41st Annual Symposium of the Ultrasonic Industry Association, San Francisco, CA, USA, 16-18 Apr 2012,

2011

Harkness, P., Lucas, M. and Cardoni, A. (2011) Architectures for ultrasonic planetary sample retrieval tools. Ultrasonics, 51(8), pp. 1026-1035. (doi:10.1016/j.ultras.2011.06.001)

Harkness, P., Lucas, M. and Cardoni, A. (2011) Maximization of the effective impulse delivered by a high-frequency/low-frequency planetary drill tool. IEEE Transactions on Ultrasonics, Ferroelectrics, and Frequency Control, 58(11), pp. 2387-2396. (doi:10.1109/TUFFC.2011.2096)

Al-Budairi, H. , Harkness, P. and Lucas, M. (2011) A strategy for delivering high torsionality in longitudinal-torsional ultrasonic devices. In: Burguete, R.L., Lucas, M., Patterson, E.A. and Quinn, S. (eds.) Advances in Experimental Mechanics VIII. Series: Applied mechanics and materials (70). Trans Tech Publications: Durnten, Switzerland, pp. 339-344. ISBN 9783037852026

Al-Budairi, H. , Harkness, P. and Lucas, M. (2011) A generalised approach to torsionality maximisation in longitudinal-torsional ultrasonic devices. In: 40th Annual Symposium of the Ultrasonic Industry Association, Glasgow, UK, 23-25 May 2011,

Harkness, P., Mathieson, A., Murray, C. and Lucas, M. (2011) Optimization of ultrosonic horns for momentum transfer and survivability in high-frequency/low-frequency planetary drill tools. In: AIAA Space 2011 Conference, California, CA, USA, 27-29 Sep 2011, (doi:10.2514/6.2011-7319)

Lucas, M. and Harkness, P. (2011) Optimisation of an ultrasonic drill horn for planetary subsurface sample retrieval. In: 40th Annual Symposium of the Ultrasonic Industry Association, Glasgow, UK, 23-25 May 2011,

2010

Cardoni, A., Harkness, P. and Lucas, M. (2010) Ultrasonic rock sampling using longitudinal-torsional vibrations. Physics Procedia, 3(1), pp. 125-134. (doi:10.1016/j.phpro.2010.01.018)

Cardoni, A., Harkness, P. and Lucas, M. (2010) Ultrasonic rock sampling using longitudinal–torsional vibrations. Ultrasonics, 50(4-5), pp. 447-452. (doi:10.1016/j.ultras.2009.09.036)

Harkness, P., Cardoni, A., Russell, J. and Lucas, M. (2010) Designing a hollow bolted Langevin transducer for ultrasonic coring. In: International Conference on Advances in Experimental Mechanics, Liverpool, UK, 7-9 Sep 2010, pp. 65-70. (doi:10.4028/www.scientific.net/AMM.24-25.65)

Harkness, P., Lucas, M., Cardoni, A. and Waugh, L. (2010) Optimization of the horn, free-mass and support architecture of an ultrasonic rock-boring system. In: AIAA Space 2010 Conference, Anaheim, LA, USA, 30 Aug - 2 Sep 2010, (doi:10.2514/6.2010-8765)

2009

Harkness, P., Cardoni, A., Lucas, M. and Waugh, I. (2009) A simple, lightweight and low-reaction deployable architecture for subsurface sample retrieval. In: AIAA Space 2009 Conference and Exposition, Pasedena, USA, 14-17 Sep 2009, (doi:10.2514/6.2009-6507)

Mathieson, A., Cardoni, A., Harkness, P. and Lucas, M. (2009) Characterisation of nonlinear behavour of power ultrasonic drilling horns. In: IEEE International Ultrasonics Symposium, Rome, Italy, 20-23 Sep 2009, pp. 2092-2095. (doi:10.1109/ULTSYM.2009.5441852)

Harkness, P., Cardoni, A. and Lucas, M. (2009) Ultrasonic rock drilling devices using longitudinal-torsional compound vibrations. In: IEEE International Ultrasonics Symposium, Rome, Italy, 20-23 Sep 2009, pp. 2088-2091. (doi:10.1109/ULTSYM.2009.5441855)

Harkness, P., Cardoni, A. and Lucas, M. (2009) An ultrasonic corer for planetary rock sample retrieval. Journal of Physics: Conference Series, 181(1), Art. 012048. (doi:10.1088/1742-6596/181/1/012048)

Lucas, M., Cardoni, A. and Harkness, P. (2009) Ultrasonic drilling for planetary exploration. In: 8th Annual Symposium of the Ultrasonic Industry Association, Vancouver, Canada, 23-25 Mar 2009,

2008

Harkness, P., Cardoni, A. and Lucas, M. (2008) Vibration considerations in the design of an ultrasonic driller/corer for planetary rock sampling. In: Sas, P. and Bergen, B. (eds.) Proceedings Of ISMA 2008: International Conference On Noise And Vibration Engineering. ISMA: Leuven, Belgium, pp. 3477-3486. ISBN 9789073802865

2007

Roberts, P.C.E. and Harkness, P.G. (2007) Drag sail for end-of-life disposal from low earth orbit. Journal of Spacecraft and Rockets, 44(6), pp. 1195-1203. (doi:10.2514/1.28626)

2006

Harkness, P. and Roberts, P.C.E. (2006) Optimisation of a deployable drag sail for the rapid disposal of small spacecraft from low earth orbit. In: 7th Cranfield Conference on Dynamics and Control of Systems and Structures in Space, Greenwich, London, UK, 16-20 July 2006,

Harkness, P. and Roberts, P.C.E. (2006) A drag sail for safe rapid disposal of spacecraft from LEO. In: 25th International Symposium of Space Technology and Science, Kanazawa, Japan, 4-11 June 2006,

This list was generated on Sun Jul 22 12:53:34 2018 BST.
Number of items: 63.

Articles

Yemets, V., Harkness, P., Dron, M., Pashkov, A., Worrall, K. and Middleton, M. (2018) Autophage engines: towards a throttleable solid motor. Journal of Spacecraft and Rockets, (doi:10.2514/1.A34153) (Early Online Publication)

Morgan, L. E., Munk, M., Davidheiser-Kroll, B., Warner, N. H., Gupta, S., Slaybaugh, R., Harkness, P. and Mark, D. F. (2017) Instrumentation development for planetary in situ 40Ar/39Ar geochronology. Geostandards and Geoanalytical Research, 41(3), pp. 381-396. (doi:10.1111/ggr.12170)

Feeney, A., Sikaneta, S., Harkness, P. and Lucas, M. (2017) Ultrasonic compaction of granular geological materials. Ultrasonics, 76, pp. 136-144. (doi:10.1016/j.ultras.2017.01.004) (PMID:28088705)

Payler, S. J. et al. (2017) Planetary science and exploration in the deep subsurface: results from the MINAR Program, Boulby Mine, UK. International Journal of Astrobiology, 16(2), pp. 114-129. (doi:10.1017/S1473550416000045)

Li, X., Harkness, P., Worrall, K., Timoney, R. and Lucas, M. (2017) A parametric study for the design of an optimized ultrasonic-percussive planetary drill tool. IEEE Transactions on Ultrasonics, Ferroelectrics, and Frequency Control, 64(3), pp. 577-589. (doi:10.1109/TUFFC.2016.2633319) (PMID:27913339)

Firstbrook, D. , Worrall, K., Timoney, R., Suñol, F., Gao, Y. and Harkness, P. (2017) An experimental study of ultrasonic vibration and the penetration of granular material. Proceedings of the Royal Society of London Series A: Mathematical, Physical and Engineering Sciences, 473(2198), 20160673. (doi:10.1098/rspa.2016.0673)

Feeney, A., Sikaneta, S., Harkness, P. and Lucas, M. (2016) An ultrasonic compactor fol oil and gas exploration. Physics Procedia, 87, pp. 72-78. (doi:10.1016/j.phpro.2016.12.012)

Felicetti, L., Ceriotti, M. and Harkness, P. (2016) Attitude stability and altitude control of a variable-geometry Earth-orbiting solar sail. Journal of Guidance, Control, and Dynamics, 39(9), pp. 2112-2126. (doi:10.2514/1.G001833)

Ceriotti, M. , Harkness, P. and McRobb, M. (2014) Synchronized orbits and oscillations for free altitude control. Journal of Guidance, Control, and Dynamics, 37(6), pp. 2062-2066. (doi:10.2514/1.G000253)

Harkness, P., McRobb, M., Lützkendorf, P., Milligan, R., Feeney, A. and Clark, C. (2014) Development status of AEOLDOS - a deorbit module for small satellites. Advances in Space Research, 54(1), pp. 82-91. (doi:10.1016/j.asr.2014.03.022)

Al-Budairi, H. , Lucas, M. and Harkness, P. (2013) A design approach for longitudinal–torsional ultrasonic transducers. Sensors and Actuators A: Physical, 198, pp. 99-106. (doi:10.1016/j.sna.2013.04.024)

Harkness, P. and Lucas, M. (2012) A brief overview of space applications for ultrasonics. Ultrasonics, 52(8), pp. 975-979. (doi:10.1016/j.ultras.2012.09.004)

Harkness, P., Lucas, M. and Cardoni, A. (2012) Coupling and degenerating modes in longitudinal–torsional step horns. Ultrasonics, 52(8), pp. 980-988. (doi:10.1016/j.ultras.2012.05.002)

Al-Budairi, H. , Harkness, P. and Lucas, M. (2012) Drill Tools for Earth and space design of a novel longitudinal-torsional ultrasonic transducer. InFocus Magazine, 2, pp. 6-7.

Harkness, P., Lucas, M. and Cardoni, A. (2011) Architectures for ultrasonic planetary sample retrieval tools. Ultrasonics, 51(8), pp. 1026-1035. (doi:10.1016/j.ultras.2011.06.001)

Harkness, P., Lucas, M. and Cardoni, A. (2011) Maximization of the effective impulse delivered by a high-frequency/low-frequency planetary drill tool. IEEE Transactions on Ultrasonics, Ferroelectrics, and Frequency Control, 58(11), pp. 2387-2396. (doi:10.1109/TUFFC.2011.2096)

Cardoni, A., Harkness, P. and Lucas, M. (2010) Ultrasonic rock sampling using longitudinal-torsional vibrations. Physics Procedia, 3(1), pp. 125-134. (doi:10.1016/j.phpro.2010.01.018)

Cardoni, A., Harkness, P. and Lucas, M. (2010) Ultrasonic rock sampling using longitudinal–torsional vibrations. Ultrasonics, 50(4-5), pp. 447-452. (doi:10.1016/j.ultras.2009.09.036)

Harkness, P., Cardoni, A. and Lucas, M. (2009) An ultrasonic corer for planetary rock sample retrieval. Journal of Physics: Conference Series, 181(1), Art. 012048. (doi:10.1088/1742-6596/181/1/012048)

Roberts, P.C.E. and Harkness, P.G. (2007) Drag sail for end-of-life disposal from low earth orbit. Journal of Spacecraft and Rockets, 44(6), pp. 1195-1203. (doi:10.2514/1.28626)

Book Sections

Firstbrook, D. G. , Harkness, P., Li, X., Timoney, R. and Worrall, K. (2018) Ultrasonically-assisted penetration of granular and cemented materials. In: Badescu, V. and Zacny, K. (eds.) Outer Solar System: Prospective Energy and Material Resources. Springer International Publishing, pp. 261-268. ISBN 9783319738444 (doi:10.1007/978-3-319-73845-1_7)

Ceriotti, M. , Harkness, P. and McRobb, M. (2014) Variable-geometry solar sailing: the possibilities of the quasi-rhombic pyramid. In: Macdonald, M. (ed.) Advances in Solar Sailing. Series: Springer Praxis Books: Astronautical Engineering. Springer in association with Praxis Publishing, pp. 899-919. ISBN 9783642349065 (doi:10.1007/978-3-642-34907-2_54)

Al-Budairi, H. , Harkness, P. and Lucas, M. (2011) A strategy for delivering high torsionality in longitudinal-torsional ultrasonic devices. In: Burguete, R.L., Lucas, M., Patterson, E.A. and Quinn, S. (eds.) Advances in Experimental Mechanics VIII. Series: Applied mechanics and materials (70). Trans Tech Publications: Durnten, Switzerland, pp. 339-344. ISBN 9783037852026

Harkness, P., Cardoni, A. and Lucas, M. (2008) Vibration considerations in the design of an ultrasonic driller/corer for planetary rock sampling. In: Sas, P. and Bergen, B. (eds.) Proceedings Of ISMA 2008: International Conference On Noise And Vibration Engineering. ISMA: Leuven, Belgium, pp. 3477-3486. ISBN 9789073802865

Conference or Workshop Item

Firstbrook, D. , Worrall, K., Timoney, R. and Harkness, P. (2018) Ultrasonically Assisted Hammer-Action Penetrators in Planetary Regolith. ASCE Earth and Space Conference, Cleveland, OH, USA, 10-13 Apr 2018.

Timoney, R., Worrall, K., Firstbrook, D. and Harkness, P. (2018) Development of a Heuristic Thermal Control System for the Ultrasonic Planetary Core Drill. ASCE Earth and Space Conference, Cleveland, OH, USA, 10-13 Apr 2018.

Worrall, K., Timoney, R., Harkness, P., Li, X. and Lucas, M. (2017) Ultrasonic Planetary Core Drill: Overview and Results from Field Trial. 14th Symposium on Advanced Space Technologies in Robotics and Automation, Leiden, The Netherlands, 20-22 Jun 2017.

Macartney, A., Li, X. and Harkness, P. (2016) Meet the MOUSE (Micro-Optic Ultrasonic Exfoliator): Mars Rover Rock Abrasion Tool (RAT) Performance Enhanced by Ultrasonic Technology. AGU Fall Meeting, San Francisco, CA, USA, 12-16 Dec 2016.

Timoney, R., Worrall, K., Li, X., Firstbrook, D. G. , Harkness, P. and Lucas, M. (2016) Preliminary Testing of the European Ultrasonic Planetary Core Drill (UPCD) in Simulated Permafrost Terrain as a Precursor to Arctic Field Trials. 13th International Planetary Probe Workshop, Maryland, USA, 13-17 Jun 2016.

Firstbrook, D. , Worrall, K., Timoney, R., Harkness, P., Suñol, F. and Gao, Y. (2016) Ultrasonically Assisted Penetration Through Granular Materials. 13th International Planetary Probe Workshop, Laurel, MD, USA, 13-17 Jun 2016.

Conference Proceedings

Worrall, K., Timoney, R., Li, X., Harkness, P. and Lucas, M. (2018) UPCD: Field Trial Results and Further Work. In: 16th Biennial ASCE International Conference on Engineering, Science, Construction and Operations in Challenging Environments, Cleveland, Ohio, 09-12 Apr 2018, (Accepted for Publication)

Chen, X., Yao, W. and Harkness, P. (2017) Pocketqube Deorbit Times: Susceptibility to the Solar Cycle. In: 2017 IEEE Aerospace Conference, Big Sky, MT, USA, 4-11 Mar 2017, pp. 1-12. ISBN 9781509016136 (doi:10.1109/AERO.2017.7943625)

Li, D., Harkness, P. and Walkinshaw, T. (2017) Design of a Solar Panel Deployment and Tracking System for Pocketqube Pico-Satellite. In: 2017 IEEE Aerospace Conference, Big Sky, MT, USA, 4-11 Mar 2017, (doi:10.1109/AERO.2017.7943910)

Felicetti, L., Harkness, P. and Ceriotti, M. (2017) Attitude and Orbital Dynamics of a Variable-Geometry, Spinning Solar Sail in Earth Orbit. In: Fourth International Symposium on Solar Sailing (ISSS 2017), Kyoto, Japan, 17-20 Jan 2017,

Firstbrook, D. G. , Worrall, K., Doherty, P., Timoney, R., Harkness, P. and Suñol, F. (2017) Ultrasonic Penetration of Granular Materials in Varying Gravity. In: ASCE Earth and Space Conference, Orlando, FL, USA, 11-15 Apr 2016, ISBN 9780784479971

Timoney, R., Li, X., Worrall, K., Firstbrook, D. G. , Harkness, P. and Lucas, M. (2017) Push-and-Twist Drillstring Assemblies. In: ASCE Earth and Space Conference, Orlando, FL, USA, 11-15 Apr 2016, ISBN 9780784479971

Dassow, J., Lee, M. , Li, X., Harkness, P., Hild, S., Naylor, L. and Leslie, A. (2016) New Approaches to Assess Weathering of Sandstone. In: 2016 Materials Research Society Fall Meeting & Exhibit, Boston, MA, USA, 27 Nov - 2 Dec 2016,

Dassow, J., Li, X., Harkness, P., Hild, S., Leslie, A., Naylor, L. and Lee, M. (2016) Sandstone Weathering: New Approaches to Assess Building Stone Decay. In: 13th International Congress on the Deterioration and Conservation of Stone, Paisley, Scotland, 6-10 Sept 2016, p. 642.

Firstbrook, D. G. , Doherty, P., Timoney, R., Harkness, P. and Suñol, F. (2015) Preparations for Variable-Gravity Regolith Penetration with an Ultrasonically-Active Probe. In: 12th International Planetary Probe Workshop, Cologne, Germany, 15-19 June 2015,

Firstbrook, D. G. , Harkness, P. and Gao, Y. (2015) Power Optimisation for an Ultrasonic Penetrator in Granular Materials. In: AIAA Space 2015 Conference, Pasadena, CA, USA, 31 Aug - 2 Sept 2015, (doi:10.2514/6.2015-4555)

Li, X., Worrall, K., Harkness, P., Timoney, R. , Bolhovitins, A. and Lucas, M. (2015) A Motion Control System Design for an Ultrasonic Planetary Core Drill (UPCD) Unit. In: AIAA Space 2015 Conference, Pasadena, CA, USA, 31 Aug - 2 Sept 2015, ISBN 9781624103346

Timoney, R., Harkness, P., Worrall, K., Li, X., Bolhovitins, A. and Lucas, M. (2015) European Ultrasonic Planetary Core Drill. In: 12th International Planetary Probe Workshop, Cologne, Germany, 15-19 June 2015,

Timoney, R., Harkness, P., Worrall, K., Li, X., Bolhovitins, A., Cheney, A. and Lucas, M. (2015) The Development of the European Ultrasonic Planetary Core Drill (UPCD). In: AIAA Space 2015 Conference, Pasadena, CA, USA, 31 Aug - 2 Sept 2015, ISBN 9781624103346

Ceriotti, M. , Harkness, P. and McRobb, M. (2014) Orbital Dynamics of Synchronised Orbit-Attitude Oscillations under Solar Radiation Pressure. In: 65th International Astronautical Congress, Toronto, ON, Canada, 29 Sep - 3 Oct 2014,

Firstbrook, D. G. , Harkness, P. and Gao, Y. (2014) A novel study on high-powered ultrasonic penetrators in granular material. In: AIAA Space 2014 Conference, San Diego, CA, USA, 4-7 Aug 2014, ISBN 9781624102578 (doi:10.2514/6.2014-4265)

Harkness, P., McRobb, M., Loh, Y., Hyde, M. and Lucas, M. (2014) A rock-coring campaign in an analogue environment: performance, lessons and development. In: AIAA Space 2014 Conference, San Diego, CA, USA, 4-7 Aug 2014, (doi:10.2514/6.2014-4264)

Harkness, P., McRobb, M., Milligan, R. and Clark, C. (2014) Deployment dynamics of AEOLDOS: an aerodynamic end of life deOrbit system for CubeSats. In: AIAA Space 2014 Conference, San Diego, CA, USA, 4-7 Aug 2014, (doi:10.2514/6.2014-4340)

Morgan, L., Davidheiser-Kroll, B., Munk, M., van Bibber, K., Harkness, P., Lee, M., Wright, I., Gupta, S. and Mark, D. (2014) Instrumentation development for planetary in situ 40Ar/39Ar geochronology. In: Goldschmidt Conference, Sacramento, CA USA, 8-13 June 2014,

Angling, M., Harkness, P., McRobb, M., Vasile, M. and Sinn, T. (2013) The wideband ionospheric sounder cubesat experiment. In: The International Beacon Satellite Symposium, London, UK, 8-12 Jul 2012,

Al-Budairi, H. , Lucas, M. and Harkness, P. (2012) Optimisation of the longitudinal-torsional output of a half-wavelength Langevin transducer. In: 41st Annual Symposium of the Ultrasonic Industry Association, San Francisco, CA, USA, 16-18 Apr 2012,

Al-Sarraf, Z., Lucas, M. and Harkness, P. (2012) A numerical and experimental study of ultrasonic metal welding. In: International Symposium on Ultrasound in the Control of Industrial Processes (UCIP 2012), Madrid, Spain, 18-20 April 2012, 012015. (doi:10.1088/1757-899X/42/1/012015)

Harkness, P. and Lucas, M. (2012) Development of a switchable system for longitudinal and longitudinal-torsional vibration extraction. In: 41st Annual Symposium of the Ultrasonic Industry Association, San Francisco, CA, USA, 16-18 Apr 2012,

Al-Budairi, H. , Harkness, P. and Lucas, M. (2011) A generalised approach to torsionality maximisation in longitudinal-torsional ultrasonic devices. In: 40th Annual Symposium of the Ultrasonic Industry Association, Glasgow, UK, 23-25 May 2011,

Harkness, P., Mathieson, A., Murray, C. and Lucas, M. (2011) Optimization of ultrosonic horns for momentum transfer and survivability in high-frequency/low-frequency planetary drill tools. In: AIAA Space 2011 Conference, California, CA, USA, 27-29 Sep 2011, (doi:10.2514/6.2011-7319)

Lucas, M. and Harkness, P. (2011) Optimisation of an ultrasonic drill horn for planetary subsurface sample retrieval. In: 40th Annual Symposium of the Ultrasonic Industry Association, Glasgow, UK, 23-25 May 2011,

Harkness, P., Cardoni, A., Russell, J. and Lucas, M. (2010) Designing a hollow bolted Langevin transducer for ultrasonic coring. In: International Conference on Advances in Experimental Mechanics, Liverpool, UK, 7-9 Sep 2010, pp. 65-70. (doi:10.4028/www.scientific.net/AMM.24-25.65)

Harkness, P., Lucas, M., Cardoni, A. and Waugh, L. (2010) Optimization of the horn, free-mass and support architecture of an ultrasonic rock-boring system. In: AIAA Space 2010 Conference, Anaheim, LA, USA, 30 Aug - 2 Sep 2010, (doi:10.2514/6.2010-8765)

Harkness, P., Cardoni, A., Lucas, M. and Waugh, I. (2009) A simple, lightweight and low-reaction deployable architecture for subsurface sample retrieval. In: AIAA Space 2009 Conference and Exposition, Pasedena, USA, 14-17 Sep 2009, (doi:10.2514/6.2009-6507)

Mathieson, A., Cardoni, A., Harkness, P. and Lucas, M. (2009) Characterisation of nonlinear behavour of power ultrasonic drilling horns. In: IEEE International Ultrasonics Symposium, Rome, Italy, 20-23 Sep 2009, pp. 2092-2095. (doi:10.1109/ULTSYM.2009.5441852)

Harkness, P., Cardoni, A. and Lucas, M. (2009) Ultrasonic rock drilling devices using longitudinal-torsional compound vibrations. In: IEEE International Ultrasonics Symposium, Rome, Italy, 20-23 Sep 2009, pp. 2088-2091. (doi:10.1109/ULTSYM.2009.5441855)

Lucas, M., Cardoni, A. and Harkness, P. (2009) Ultrasonic drilling for planetary exploration. In: 8th Annual Symposium of the Ultrasonic Industry Association, Vancouver, Canada, 23-25 Mar 2009,

Harkness, P. and Roberts, P.C.E. (2006) Optimisation of a deployable drag sail for the rapid disposal of small spacecraft from low earth orbit. In: 7th Cranfield Conference on Dynamics and Control of Systems and Structures in Space, Greenwich, London, UK, 16-20 July 2006,

Harkness, P. and Roberts, P.C.E. (2006) A drag sail for safe rapid disposal of spacecraft from LEO. In: 25th International Symposium of Space Technology and Science, Kanazawa, Japan, 4-11 June 2006,

This list was generated on Sun Jul 22 12:53:34 2018 BST.