Dr Andrew Johnson

B.Eng (Sheffield), PhD (Hull), C.Eng, F.I.Mech.E

Dr A R Johnson

Senior Lecturer

Admissions Tutor (Mechanical Engineering Undergraduate Studies)

Department of Mechanical Engineering
The University of Sheffield,
RC12, Mappin Mining Block
Mappin Street, Sheffield, S1 3JD

Telephone: +44 (0) 114 222 7741
Fax: +44 (0) 114 222 7890

email : a.r.johnson@sheffield.ac.uk


Profile

Andrew Johnson graduated from the Department in 1974 and joined Pirelli General as a Research Engineer investigating aspects of large high voltage underground cables. In 1976 he moved to Cambridge University as a Research Assistant working on Computer Aided Design and Manufacturing. In 1980 he was appointed as the first lecturer in the newly formed Department of Design and Manufacturing at the University of Hull where he was involved in setting up the new department and undergraduate course. During his time at Hull he also conducted research on fluid flow in rotating turbo-machinery for which he was awarded a PhD. In 1985 he moved back to Sheffield as a lecturer in Dynamics and was promoted to Senior lecturer in 1993.

He has always had a keen interest in teaching and has taught a wide range of courses. His current teaching is mainly in Engineering Mechanics. He has also undertaken numerous administrative roles within the department including Departmental Examinations Officer from 1995-1998 and Director of Teaching from 1996-2004. He is currently the Admissions Tutor for the undergraduate courses. He has been on many Faculty and University committees, at University level he is currently on working groups looking at various Teaching, Assessment and Regulations issues throughout the University.

In addition to his academic activities, he is a Fellow of the Institution of Mechanical Engineers and a Chartered Engineer.

Research Interests

Andrew works with an active group working on the application of Smart Fluids in a variety of applications, including damping and vibration control, clutches and positioning devices. Two fluids are used, firstly Electro-Rheological Fluids, which change their characteristics with an applied electric field, and secondly Magneto-Rheological Fluids, which change their characteristics with an applied magnetic field.

One research theme is using a pair of high-speed electro-rheological clutches that are linked by a belt to produce a traversing mechanism. This is more flexible than existing mechanical devices and allows repeatable high-speed operation, combined with the flexibility of electronic control. A recent development has seen the addition of an electro-rheological brake to the mechanism and an arm, which allows the concept to be extended into high speed and lightweight robotics.

Andrew also works on the computer modelling and simulation of wire rope roadway safety fences. These fences consist of wire ropes supported by posts and are used in the central reservations and at the edges of roadways. The group has developed a computer simulation of fences that allows the design of the fence to be investigated. This has resulted in improved designs that reduce the severity of impacts whilst protecting other road users. The simulation is being developed to broaden the application of the safety fence and to enable it to meet all international crash test standards.

Teaching

Andrew has taught a wide variety of subjects. His main current teaching duties are the following first year modules which are taught to Mechanical, Aerospace, Biomedical, Combined, Automatic Control and Systems Engineering students.

MEC112 Fundamental Engineering Mechanics
MEC116 Engineering Mechanics

Journal articles

  • Bateman MB, Howard IC, Johnson AR & Walton IM (2007) Validation of a computer simulation of the impact performance of a wire rope safety fence. P I MECH ENG C-J MEC, 221(12), 1557-1570.
  • Tan KP, Johnson AR, Stanway R & Bullough WA (2007) Model validation of the output reciprocating dynamic responses of a twin electro-rheological (ER) clutch mechanism. MECH MACH THEORY, 42(11), 1547-1562.
  • Tan KP, Stanway R, Johnson AR & Bullough WA (2005) Model validation and trend study of a twin electro-rheological (ER) clutch mechanism for robotic applications. INT J MOD PHYS B, 19(32), 4733-4768.
  • Johnson AR, Bullough WA & Makin J (2002) Design and control considerations for a high-speed electro-rheological traversing mechanism. J INTEL MAT SYST STR, 13(11), 725-735.
  • Tan KP, Bullough WA, Stanway R, Sims N, Johnson AR & Tozer RC (2002) A simple one dimensional robot joint based on the ER linear reversing mechanism. JOURNAL OF INTELLIGENT MATERIAL SYSTEMS AND STRUCTURES, 13(7-8), 533-537.
  • Bateman MB, Howard IC, Johnson AR & Walton JM (2001) Computer simulation of the impact performance of a wire rope safety fence. INT J IMPACT ENG, 25(1), 67-85.
  • Sims ND, Stanway R, Johnson AR, Peel DJ & Bullough WA (2000) Smart fluid damping: Shaping the force/velocity response through feedback control. J INTEL MAT SYST STR, 11(12), 945-958.
  • Sims ND, Peel DJ, Stanway R, Johnson AR & Bullough WA (2000) The electrorheological long-stroke damper: A new modelling technique with experimental validation. J SOUND VIB, 229(2), 207-227.
  • Sims ND, Stanway R, Peel DJ, Bullough WA & Johnson AR (1999) Controllable viscous damping: an experimental study of an electrorheological long-stroke damper under proportional feedback control. SMART MATER STRUCT, 8(5), 601-615.
  • Johnson AR, Bullough WA & Makin J (1999) Dynamic simulation and performance of an electro-rheological clutch based reciprocating mechanism. SMART MATER STRUCT, 8(5), 591-600.
  • Sims ND, Stanway R & Johnson AR (1999) Vibration control using smart fluids: A state-of-the-art review. Shock and Vibration Digest, 31(3), 195-205.
  • Bullough WA, Makin J, Johnson AR, HosseiniSianaki A & Firoozian R (1996) ER shear characteristics: Volume fraction, shear rate, time response. J DYN SYST-T ASME, 118(2), 221-225.
  • Bullough WA, Johnson AR, Makin J, Tozer R & Day A (1996) Status report: ER clutch based linear drive. Proceedings of SPIE - The International Society for Optical Engineering, 3321, 492-501.
  • JOHNSON AR, MAKIN J & BULLOUGH WA (1995) CONTROL INDICATIONS FOR AN INERTIAL DRIVE CLUTCH USING ELECTRO-STRUCTURED FLUID UNDER CYCLIC OPERATION. J INTEL MAT SYST STR, 6(1), 100-108.
  • Bullough WA, Johnson AR, Hosseini-Sianaki A, Makin J & Firoozian R (1993) Electro-rheological clutch: design, performance characteristics and operation. Proceedings of the Institution of Mechanical Engineers. Part I, Journal of systems and control engineering, 207(2), 87-95.
  • Johnson AR, Makin J, Bullough WA, Firoozian R & Hosseini-Sianaki A (1993) Fluid Durability in a High Speed Electro-Rheological Clutch. Journal of Intelligent Material Systems and Structures, 4(4), 527-532.
  • JOHNSON AR, BULLOUGH WA, FIROOZIAN R, HOSSEINISIANAKI A, MAKIN J & XIAO S (1992) TESTING ON A HIGH-SPEED ELECTRORHEOLOGICAL CLUTCH. INT J MOD PHYS B, 6(15-16), 2731-2747.
  • JOHNSON AR & MORRIS WD (1992) AN EXPERIMENTAL INVESTIGATION INTO THE EFFECTS OF ROTATION ON THE ISOTHERMAL FLOW RESISTANCE IN CIRCULAR TUBES ROTATING ABOUT A PARALLEL AXIS. INT J HEAT FLUID FL, 13(2), 132-140.

Conference proceedings papers

  • Johnson AR & Stanway R (2005) Validation of computational models and a new experimental facility of a robot actuator using twin electro-rheological clutches. Smart Structures and Materials 2005: Smart Structures and Integrated Systems, Vol. 5764 (pp 302-311)
  • Johnson AR, Stanway R, Tan KP & Sims ND (2003) Electro-rheological clutches for a robotics application: Dynamic, operational and control considerations.. SMART STRUCTURES AND MATERIALS 2003: SMART STRUCTURES AND INTEGRATED SYSTEMS, Vol. 5056 (pp 432-443)
  • Tan KP, Stanway R, Johnson AR, Bullough WA & Tozer RC (2001) An Electro-rheological clutch for robotics applications: Validation of mathematical model and preliminary control study.. SMART STRUCTURES AND MATERIALS 2001: SMART STRUCTURES AND INTEGRATED SYSTEMS, Vol. 4327 (pp 137-147)
  • Sims ND, Stanway R & Johnson AR (2001) Experimental testing and control of an ER long-stroke vibration damper. SMART STRUCTURES AND MATERIALS 2001: SMART SYSTEMS FOR BRIDGES, STRUCTURES, AND HIGHWAYS, Vol. 4330 (pp 218-226)
  • Sims ND, Stanway R & Johnson AR (2001) Experiments with feedback control of an ER vibration damper. IUTAM SYMPOSIUM ON SMART STRUCTURES AND STRUCTRONIC SYSTEMS, Vol. 89 (pp 307-314)
  • Sims ND, Stanway R, Johnson AR & Mellor P (2001) Design, testing and model validation of an MR squeeze-flow vibration damper. SMART STRUCTURES AND MATERIALS 2001: DAMPING AND ISOLATION, Vol. 4331 (pp 111-120)
  • Stanway R, Sims ND & Johnson AR (2000) Modelling and control of a magnetorheological vibration isolator. SMART STRUCTURES AND MATERIALS 2000: DAMPING AND ISOLATION, Vol. 3989 (pp 184-193)
  • Sims ND, Stanway R, Johnson AR, Peel DJ & Bullough WA (2000) Smart fluid damping: Shaping the force/velocity response through feedback control. SMART STRUCTURES AND MATERIAL 2000: SMART STRUCTURES AND INTEGRATED SYSTEMS, Vol. 3985 (pp 470-481)
  • Johnson AR, Bullough WA & Makin J (2000) Optimisation and control of a high speed electro-rheological traversing mechanism.. SMART STRUCTURES AND MATERIAL 2000: SMART STRUCTURES AND INTEGRATED SYSTEMS, Vol. 3985 (pp 456-467)
  • Bullough WA, Makin J, Johnson AR & Tozer R (1999) Interactive dynamic, thermodynamic and electrical studies on an electronically adjustable ER linear reversing mechanism. JOURNAL OF INTELLIGENT MATERIAL SYSTEMS AND STRUCTURES, Vol. 10(8) (pp 595-600)
  • Bullough WA, Johnson AR, Tozer R & Makin J (1999) Methodology, performance and problems in ER clutch based positioning mechanisms. INTERNATIONAL JOURNAL OF MODERN PHYSICS B, Vol. 13(14-16) (pp 2101-2108)
  • Stanway R, Sims ND & Johnson AR (1999) Magneto-rheological fluids in squeeze-flow: Validation of quasi-steady mathematical models. American Society of Mechanical Engineers, Fluids Engineering Division (Publication) FED, Vol. 249 (pp 117-121)
  • Sims ND, Stanway R, Johnson AR & Yang JS (1999) Vibration isolation using a magneto-rheological damper in the squeeze-flow mode. SMART STRUCTURES AND MATERIALS 1999: SMART STRUCTURES AND INTEGRATED SYSTEMS, PTS 1 AND 2, Vol. 3668 (pp 520-526)
  • Johnson AR, Bullough WA, Tozer R & Makin J (1999) Thermal equilibrium in a dynamic electro-rheological fluid model of a high speed traversing/positioning mechanism. SMART STRUCTURES AND MATERIALS 1999: SMART STRUCTURES AND INTEGRATED SYSTEMS, PTS 1 AND 2, Vol. 3668 (pp 495-506)
  • Sims ND, Stanway R, Johnson AR, Peel DJ & Bullough WA (1999) Feedback control of an electrorheological long-stroke vibration damper. SMART STRUCTURES AND MATERIALS 1999: PASSIVE DAMPING AND ISOLATION, Vol. 3672 (pp 73-81)
  • Bateman MB, Howard IC, Johnson AR & Walton JM (1998) Model of the performance of a roadway safety fence and its use for design. GENERAL DESIGN AND ROADSIDE SAFETY FEATURES(1647) (pp 122-129)
  • Johnson AR, Bullough WA, Tozer R & Makin J (1998) Simulation, performance and experimental validation of a high speed traversing/positioning mechanism using electro-rheological clutches.. SMART STRUCTURES AND MATERIALS 1998: SMART STRUCTURES AND INTEGRATED SYSTEMS, PTS 1 AND 2, Vol. 3329 (pp 402-413)
  • Johnson AR, Bullough WA, Makin J & Tozer R (1997) Dynamic modelling and performance of a high speed electro-rheological traversing mechanism.. SMART STRUCTURES AND INTEGRATED SYSTEMS - SMART STRUCTURES AND MATERIALS 1997, Vol. 3041 (pp 516-527)
  • Johnson AR, Moffat JM & Wilson RA (1995) Mathematics support for engineering CAL. MATHEMATICAL EDUCATION OF ENGINEERS, Vol. 57 (pp 347-352)
  • Johnson AR & Atkin RJ (1995) Mathematics teaching for BTEC and A level entrants on a mechanical engineering degree course. MATHEMATICAL EDUCATION OF ENGINEERS, Vol. 57 (pp 175-191)
  • BULLOUGH WA, MAKIN J & JOHNSON AR (1995) Requirements and targets for ER fluids in electrically flexible high speed power transmissions. PROGRESS IN ELECTRORHEOLOGY (pp 295-302)
  • JOHNSON AR, MAKIN J & BULLOUGH WA (1994) ELECTRORHEOLOGICAL CATCH/CLUTCH - INERTIAL SIMULATIONS. INTERNATIONAL JOURNAL OF MODERN PHYSICS B, Vol. 8(20-21) (pp 2935-2954)
  • BULLOUGH WA, MAKIN J, FIROOZIAN R, JOHNSON AR & HOSSEINISIANAKI A (1994) THE EFFECT OF SOLID FRACTION CONCENTRATION ON THE TIME-DOMAIN PERFORMANCE OF AN ER FLUID IN THE SHEAR MODE. INTERNATIONAL JOURNAL OF MODERN PHYSICS B, Vol. 8(20-21) (pp 2855-2876)
  • MAKIN J, JOHNSON AR & BULLOUGH WA (1994) TOTAL MECHATRONIC DESIGN - ELECTRO-RHEOLOGICAL TRAVERSE GEAR. MECHATRONICS (pp 405-410)