Publications

Zeitschrift (reviewed)

  • Schmelt, A.S.; Marhenke, T.; Hasener, J.; Twiefel, J. (2020): Investigation and Enhancement of the Detectability of Flaws with a Coarse Measuring Grid and Air Coupled Ultrasound for NDT of Panel Materials Using the Re-Radiation MethodMDPI-applied science | File |
    DOI: 10.3390/app10031155
  • Schmelt, A.S.; Twiefel, J. (2020): The Spec-Radiation Method as a Fast Alternative to the Re-Radiation Method for the Detection of Flaws in Wooden ParticleboardsMDPI Appl. Sci. 2020, 10, 6663 | File |
    DOI: https://doi.org/10.3390/app10196663
  • Denkena, B.; Breidenstein, B.; Grove, T.; Prasanthan, V.; Overmeyer, L.; Nothdurft, S.; Kaierle, S.; Wallaschek, J.; Twiefel, J.; Ohrdes, H.; Maier, H. J.; Hassel, T.; Mildebrath, M.: (2019): Surface integrity of turned laser-welded hybrid shaftsProduction Engineering
    DOI: 10.1007/s11740-018-0862-8
  • Nothdurft, S., Ohrdes, H., Twiefel, J., Wallascheck, J., Mildebrath, M., Maier, H. J., Hassel, T., Overmeyer, L., Kaierle, S. (2019): Influence of ultrasonic amplitude and position in the vibration distribution on the microstructure of a laser welded aluminum alloyJournal of Laser Applications 31
  • Aboulfotoh, N.; Twiefel, J. (2018): On developing an optimal design procedure for a bimorph piezoelectric cantilever energy harvester under a predefined volumeMechanical Systems and Signal Processing 106 (2018): 1-12
  • Andreas S. Schmelt, Viktor Hofmann, Eike C. Fischer, Marc C. Wurz, Jens Twiefel (2018): Design and characterization of the lateral actuator of a bimodal tactile display with two excitation directionsDisplays, Volume 54, September 2018, Pages 34-46 | File |
    DOI: https://doi.org/10.1016/j.displa.2018.09.002
  • Bai, F., Saalbach, K.-A., Long Y., Twiefel, J., Wallaschek, J. (2018): Capability evaluation of ultrasonic cavitation peening at different standoff distances.Ultrasonics
    DOI: /10.1016/j.ultras.2017.10.013
  • Fushi Bai, Kai-Alexander Saalbach, Liang Wang, Xiaogeng Wang, Jens Twiefel (2018): Impact of time on ultrasonic cavitation peening via detection of surface plastic deformationUltrasonics
    DOI: /10.1016/j.ultras.2017.12.001
  • Kai-Alexander Saalbach, Hendrik Ohrdes, Jens Twiefel (2018): Closed Loop Cavitation Control - A Step Towards SonomechatronicsUltrasonics Sonochemistry
    DOI: /10.1016/j.ultsonch.2018.01.021
  • Kai-Alexander Saalbach, Jens Twiefel, Jörg Wallaschek (2018): Self-sensing cavitation detection in ultrasound-induced acoustic cavitationUltrasonics
    DOI: /10.1016/j.ultras.2018.06.016
  • Nothdurft, S.; Springer, A.; Kaierle, S.; Mildebrath, M.; Maier, H. J.; Hassel, T.; Ohrdes, H.; Twiefel, J.; Wallaschek, J.; Overmeyer, L. (2018): Laser welding of dissimilar low-alloyed steel-steel butt joints and the effects of beam position and ultrasound excitation on the microstructureJournal of Laser Applications 30, 3, 032417
  • Aboulfotoh, N.; Twiefel, J. (2017): A Study on Bandwidth and Performance Limitations of Array Vibration Harvester ConfigurationsEnergy Harvesting and Systems
  • Aboulfotoh, N.; Twiefel, J.; Krack, M. ; Wallaschek, J. (2017): Experimental Study on Performance Enhancement of a Piezoelectric Vibration Energy Harvester by applying Self-Resonating BehaviorEnergy Harvesting and Systems, Oct. 2017
    DOI: 10.1515/ehs-2016-0027
  • Bai, F., Saalbach, K.-A., Twiefel, J., & Wallaschek, J. (2017): Effect of different standoff distance and driving current on transducer during ultrasonic cavitation peening. Sensors and Actuators A: Physical.
    DOI: /10.1016/j.sna.2017.05.002
  • Hofmann, V.; Twiefel, J (2017): Self-Sensing with Loaded Piezoelectric Bending Actuators, Sensors and Actuators APhysical, Volume 263, August 2017, Pages 737-743
  • Krack, M.; Aboulfotoh, N.; Twiefel, J.; Wallaschek, J.; Bergman, L.A.; Vakakis, A.F. (2017): Toward understanding the self-adaptive dynamics of a harmonically forced beam with a sliding massArchive of Applied Mechanics
  • Long, Y.; Twiefel, J. and Wallaschek, J. (2017): A review on the mechanisms of ultrasonic wedge-wedge bondingJournal of Materials Processing Technology, 245, 2017, pp. 241-258
  • Ohrdes, H.; Ille, I.; Twiefel, J.; Wallaschek, J.; Nogueira, R.; Rosenwinkel, K. H. (2017): A control system for ultrasound devices utilized for inactivating E. coli in wastewaterUltrasonics Sonochemistry
    DOI: 10.1016/j.ultsonch.2017.04.017
  • Wang, L.; Wielert, T.; Twiefel, J.; Jin, J.; Wallaschek, J. (2017): A Rod Type Linear Ultrasonic Motor Utilizing Longitudinal Traveling Waves: Proof of ConceptSmart Materials and Structures, 26 (2017) 085013
  • Aboulfotoh, N.; Krack, M.; Twiefel, J.; Wallaschek, J. (2016): A Self-Resonant System-Experimental Investigations of Boundary and Operating ConditionsPAMM 16, 1, pp. 253-254, October
    DOI: 10.1002/pamm.201610115
  • Brouet, F.; Twiefel, J.; Wallaschek, J. (2016): Modal interaction in ultrasonic welding block sonotrodes induced by the mistuning of the material propertiesJournal of Sound and Vibration 318, pp. 1-13, October
    DOI: 10.1016/j.jsv.2016.06.021
  • Bruns, P.; Mojrzisch, S.; Twiefel, J.; Wallaschek, J.; Zimmermann, U.; Klie, W. (2016): Prüfstand mit piezoelektrischen Schwingungserzeugern zur Ermittlung der dynamischen Steifigkeit von ElastomerbauteilenForschung im Ingenieurwesen 80, 1-2, pp. 29-40 June
    DOI: 10.1007/s10010-016-0204-y
  • Hofmann, V.; Twiefel, J.; Glukhovskoy, A.; Beringer, S.; Wurz, M. C.; Wallaschek, J.; Rissing, L. (2016): Intracochlear Stimulation of the Basilar MembraneBiomed Tech 61, p.179
    DOI: 10.1515/bmt-2016-5014
  • Marhenke, T.; Twiefel, J.; Hasener, J. (2016): Transiente Ultraschallfeldvisualisierung von Transmissionsvorgängen an Platten auf Basis der RefraktovibrometrieTM – Technisches Messen 83, 10, pp. 580-592, October
    DOI: 10.1515/teme-2016-0003
  • Saalbach, K.; Twiefel, J.; Wallaschek, J. (2016): 1945. Self-sensing cavitation detection capability of horn geometries for high temperature applicationJournal of Vibroengineering 18, 2, pp. 989-998, March
  • Van Drunen, W. J.; Hofmann, V.; Twiefel, J.; Glukhovskoy, A.; Beringer, S.; Wurz, M. C.; Rau, T. S.; Wallaschek, J.; Rissing, L.; Lenarz, L.; Majdani, O. (2016): Track P. Medical Implants/Implant DevelopmentBiomedical Engineering 61, 1, pp. 179-199
    DOI: 10.1515/bmt-2016-5014
    ISBN: ISSN (online) 1862-278X, ISSN (print) 0013-5585
  • Brouet, F.; Twiefel, J.; Wallaschek, J. (2015): Frequency veering and mode degeneration of a rectangular discPAMM 15 (1), 175-176
    DOI: 10.1002/pamm.201510078
  • Bruns, P.; Twiefel, J. (2015): Influences of Non-axial Process Loads on the Transducer and the Associated Mounting in Ultrasonic MachiningEnergy Harvesting and Systems
    DOI: 10.1515/ehs-2014-0022
    ISBN: ISSN (Online) 2329-8766, ISSN (Print) 2329-8774
  • Hofmann, V.; Kleyman, G.; Twiefel, J. (2015): Modeling and Experimental Investigation of a Periodically Excited Hybrid Energy-Harvesting GeneratorEnergy Harvesting and Systems
    DOI: 10.1515/ehs-2014-0043
  • Hofmann, V.; Twiefel, J. (2015): Optimization of a Piezoelectric Bending Actuator for a Tactile Virtual Reality DisplayEnergy Harvesting and Systems
  • Saalbach, K.; Wurz, M. C.; Twiefel, J.; Rissing, L.; Wallaschek J. (2015): Custom Lithium Niobate Transducers for Detecting Material Distribution of Hybrid WorkpiecesEnergy Harvesting and Systems. Band 2, Heft 3-4, Seiten 137–142
    DOI: 10.1515/ehs-2014-0045
    ISBN: ISSN (Online) 2329-8766, ISSN (Print) 2329-8774
  • Stehle, T.; Eisseler, R.; Drewle, K.; Weiland, S.; Bruns, P.; Twiefel, J. (2015): Investigation of Process Forces of Ultrasonically Assisted Scratch TestsProceedings of the 3rd International Conference on Stone and Concrete Machining (ICSCM), November 2-3, Bochum, S. 137-145
    DOI: 10.13154/icscm.3.2015.137-145
  • Heisel, U., Eisseler, R., Eber, R., Wallaschek, J., Twiefel, J., Huang, M. (2012): Ultrasonic-assisted machining of stoneProduction Engineering, 6 (2), pp. 587-594
    DOI: 10.1007/s11740-011-0330-1
  • Wurpts, W.; Twiefel, J. (2012): Analysis of Ultrasonic Vibro-Impact Systems with Equivalent Circuits and the Harmonic Balance MethodSensors and Actuators A: Physical, Elsevier
    DOI: 10.1016/j.sna.2012.10.007
  • Heisel, U.; Eber, R.; Wallaschek, J.; Twiefel, J. (2011): Kinematic model for ultrasonic-assisted manufacturing of bore holes with undefined cutting edgesJournal of Advanced Materials Research 223 (2011), pp. 794 – 803
    DOI: 10.4028/www.scientific.net/AMR.223.794
  • Neubauer, M.; Renner, A.; Twiefel, J. (2010): Stability Analysis of a Disc Brake with Piezoelectric Self-Sensing Technique SAE International Journal of Passenger Cars – Mechanical Systems, Vol. 2, No. 2, pp. 24-31
    DOI: 10.4271/2009-01-3034
    ISBN: 1946-4002

Conferences (reviewed)

  • Arndt, M., Long, Y., Dencker, F., Reimann, J., Twiefel J., Wurz, M. (2020): Novel Piezoelectric Force Sensor Array for Investigation of Ultrasonic Wire BondingElectronic Components and Technology Conference (ECTC), Jun. 3-30, Orlando, USA, pp.276-283
    DOI: 10.1109/ECTC32862.2020.00053
  • Schmelt, A.S.; Li, Z.; Marhenke, T.; Hasener, J.; Twiefel, J. (2020): Aussagefähigkeit von Fehlstellenimitaten in der ZfPTagungsband DAGA 2020 - 46. Jahrestagung für Akustik | File |
    ISBN: 978-3-939296-17-1
  • A. S. Schmelt; E. C. Fischer; V. Hofmann; J. Twiefel; M. C. Wurz (2019): Vibro-tactile displays for stimulating surface impressionsPROCEEDINGS of the 23rd International Congress on Acoustics 9 to 13 September 2019 in Aachen, Germany, pp. 1000-1007 | File |
    ISBN: ISSN 2226-7808 and 2415-1599 ISBN 978-3-939296-15-7
  • A. S. Schmelt; T. Marhenke; J. Twiefel (2019): Identifying objects in a 2D-space utilizing a novel combination of a re-radiation based method and of a difference-image-methodPROCEEDINGS of the 23rd International Congress on Acoustics 9 to 13 September 2019 in Aachen, Germany, pp. 8156-8163 | File |
    ISBN: ISSN 2226-7808 and 2415-1599 ISBN 978-3-939296-15-7
  • A. S. Schmelt, E. C. Fischer, M. C. Wurz and J. Twiefel (2018): Solid State Joint Actuator for a Vibro Tactile Line Display,ACTUATOR 2018; 16th International Conference on New Actuators, Bremen, Germany, 2018, pp. 1-4VDE Verlag | File |
    ISBN: 978-3-8007-4675-0
  • Behrens, B.A., Chugreev, A.; Matthias, T.; Nothdurft, S.; Hermsdorf, J.; Kaierle, S.; Ohrdes, H.; Twiefel, J.; Wallaschek, J.; Mildebrath, M.; Hassel, T. (2018): Investigation of the composite strength of hybrid steel-steel semi-finished products manufactured by laser beam welding and friction welding5TH INTERNATIONAL CONFERENCE of recent trends in structural materials (COMAT), 14.-16.11.2018, Pilsen
    DOI: 10.1088/1757-899X/461/1/012049
  • Bruns, P.; Twiefel, J.; Wallaschek, J. (2017): Modeling of ultrasonic processes utilizing a generic software frameworkIOP Conference Series: Materials Science and Engineering, Vol. 211. No. 1, IOP Publishing, 2017
  • Fischer, E.; Glukhovskoy, A.; Schmelt, A., S.; Twiefel, J.; Wurz, M.,C. (2017): Mikroaktorik für ein Taktiles DisplayProceedings of the MikroSystemTechnik Kongress 2017, October 23–25, 2017 München, S. 515-518
  • Hofmann, V.; Twiefel, J. (2017): Cultivator Optimization for Ultrasonic Friction Reduction using the Transfer Matrix Modeling MethodThe International Workshop on Piezoelectric Materials and Applications in Actuators, Falls Church, VA, USA
  • Long, Y.; Dencker, F.; Isaak, A.; Li, C.; Schneider, F.; Hermsdor, J.; Wurz, M.; Twiefel, J.; Wallaschek, J. (2017): Analysis of the Wire/Substrate Interface during Ultrasonic Bonding ProcessIEEE CPMT Symposium Japan (ICSJ), Nov 20-22, 2017 Kyoto, Japan, S. 203-206
  • Long, Y.; Dencker, F.; Isaak, A.; Schneider, F.; Hermsdor, J.; Wurz, M.; Twiefel, J. (2017): Visualization of Oxide Removal during Ultrasonic Wire Bonding Process19th IEEE Electronics Packaging Technology Conference (EPTC), Dec 6-9, 2017 Singapore, S. 1-4
  • Marhenke, T.; Twiefel, J.; Hasener , J.; Wallaschek, J. (2017): Ermittlung mechanischer Kennwerte von Holzwerkstoffen mittels Modal-UpdatingProceedings der 35. CADFEM Simulation Conference, November 15-17, Koblenz, Deutschland
  • Marhenke, T.; Twiefel, J.; Hasener , J.; Wallaschek, J. (2017): Determination of Mechanical Properties of Wood Based Materials using Modal UpdatingProceedings of the IEEE International Ultrasonics Symposium (IEEE IUS), September 6-9, Washingstion D.C., USA, 2017
  • Nothdurft, S.; Springer, A.; Kaierle, S.; Mildebrath, M.; Maier, H. J.; Hassel, T.; Ohrdes, H.; Twiefel, J.; Wallaschek, J.; Overmeyer, L. (2017): Influence of beam position and ultrasonic amplitude on the microstructure of laser welded dissimilar steel-steel jointsInternational Congress on Applications of Lasers & Electro-Optics (ICALEO®), 22.-26.10.2017, Atlanta
  • Schneider, F.; Long, Y.; Ohrdes, H.; Twiefel, J.; Brökelmann, M.; Hunstig, M.; Venkatesh, A.; Hermsdorf, J.; Kaierle, S.; Overmeyer, L (2017): Effect of laser assistance in ultrasonic copper wire bonding Lasers in Manufacturing Conference 2017
  • Aboulfotoh, N.; Twiefel J. (2016): A Study on the Influence of Design Parameters on the Power Output Characteristic of Piezoelectric Vibration Energy HarvesterProceedings of the 27th International Conference on Noise and Vibration Engineering, ISMA, Leuven
  • Bruns, P.; Twiefel, J.; Wallaschek, J. (2016): Experimental and Theoretical Investigation of a Vibro-Impact Process Utilizing an in situ Capacitive Distance MeasurementProceedings of ISMA2016 International Conference on Noise and Vibration Engineering, September 19-21, Leuven, Belgium
  • Long, Y.; Dencker, F.; Schneider, F.; Emde, B.; Li, C.; Hermsdorf, J.; Wurz, M.; Twiefel, J. (2016): Investigations on the Oxide Removal Mechanism during Ultrasonic Wedge-Wedge Bonding ProcessIEEE 18th Electronics Packaging Technology Conference, November 30 - December 3, Singapore, Southeast Asia, pp. 405-410
  • Long, Y.; Dencker, F.; Wurz, M.; Feldhoff, A.; Twiefel, J. (2016): A deeper understanding on the motion behaviors of wire during ultrasonic wedge-wedge bonding processInternational Symposium on Microelectronics, October 10-13, Pasadena, USA, pp. 427-432
  • Marhenke, T.; Twiefel, J.; Wallaschek, J. (2016): Zerstörungsfreie Delaminationserkennung mittels luftgekoppeltem UltraschallTagungsband der 14. Vibrometerkonferenz der Polytec GmbH: Einsatz Optischer Schwingungsmesstechnik in Industrie und Forschung, November 22-23, Waldbronn, Germany
  • Marhenke, T.; Twiefel, J.; Wallaschek, J. (2016): Delaminationserkennung in Holzwerkstoffen auf Basis der UltraschalltransmissionsmessungTagungsband des 3. Workshop des Fachausschusses Ultraschall der DEGA e.V.: Messtechnische Anwendungen von Ultraschall, June 20-22, Drübeck, Germany
  • Ohrdes, H.; Fischer, H.; Twiefel, J.; Wallaschek J. (2016): Experimental investigation of ultrasonic fluid mixing as assistance for a laser welding processProceedings of ISMA2016: International Conference on Noise and Vibration Engineering, September 19-21, Leuven, Belgium, pp. 1595-1603
  • Schmidt, M.;Reinke, P.; Beckmann, T.; Saalbach, K. A.; Wallaschek, J.; Twiefel, J.; Bai, F. (2016): Numerical and experimental investigation of the levitation and flow created by ultrasonic fields in narrow gaps5th Micro and Nano Flows Conference
  • Wielert, T.; Vagapov, A.; Twiefel, J.; Mešan, I.; Bott, K. (2016): Performance of a Novel Small Component Conveyor Utilizing Flexural Travelling WavesConference Proceedings of ACTUATOR 2016, 15th International Conference on New Actuators, June 13-15, Bremen, Germany
  • Bruns, P.; Mojrzisch, S.; Twiefel, J.; Wallaschek, J.; Klie, W.; Zimmermann, U. (2015): Piezoelektrische Schwingungserzeuger zur Ermittlung der dynamischen Steifigkeiten von ElastomerbauteilenVDI Mechatroniktagung, Dortmund
  • Bruns, P.; Twiefel, J.; Wallschek, J. (2015): Investigations on the Mounting Position of Ultrasonic TransducersThe 12th International Workshop on Piezoelectric Materials and Applications in Actuators, Vilnius
  • Ertz, G.; Krack, M.; Twiefel, J.; Secanell, M.; Mertiny, P. (2015): Skalierbarer Demonstrator für Mobile SchwungradspeichersystemeVDI Mechatroniktagung, März 12-13, Dortmund, Deutschland
  • Ertz, G.; Twiefel, J.; Secanell, M.; Mertiny, P. (2015): Design and Manufacturing of a Scalable Composite Flywheel Demonstrator for Mobile Energy Storage SystemCANCOM, August 17-20, Edmonton, Canada
  • Long, Y.; Twiefel, J.; Roth, J.; Wallaschek, J. (2015): Real-time observation of interface relative motion during ultrasonic wedge-wedge bonding processIn International Symposium on Microelectronics, IMAPS (International Microelectronics, Assembly and Packaging Society), pp. 419-424
  • Weinstein, M.; Ille, I.; Mojrzisch, S.; Twiefel, J.; Wallaschek, J. (2015): Resonance Frequency Tuning of Piezoelectric Ultrasonic Transducers Using Resonant Switching ConvertersThird International Academic Conference of Postgraduates, NUAA, Nanjing, China
  • Wielert, T.; Twiefel, J.; Mešan, I.; Bott, K. (2015): Kleinteileförderung mit einem ultraschallbasierten WanderwellentransportsystemTagungsband Mechatronik 2015
    ISBN: 978-3-00-048814-6
  • Bruns, P.; Mojrzisch, S.; Twiefel, J. (2013): Stress Distribution and Durability of Pre-Stressed Piezoelectric Multilayer Actuators10th International Workshop on Piezoelectric Materials and Applications, Hannover, Germany
  • Roth, J.; Twiefel, J.; Wallaschek, J. (2013): Energy Harvesting Patents 2012Proceedings of 10th International Workshop on Piezoelectric Materials and Applications and 8th Energy Harvesting Workshop, Hannover, Germany
  • Saalbach, K.; Freytag, P.; Kerber, K.; Twiefel, J. (2013): Bond Quality Investigation of Ultrasonic Assisted Composite CastingProceedings of 10th International Workshop on Piezoelectric Materials and Applications and 8th Energy Harvesting Workshop, July 14-17, Hannover, Germany
    ISBN: 978-3-944586-10-6
  • Saalbach, K.; Freytag, P.; Kerber, K.; Twiefel, J. (2013): Ultrasonic Assisted Simultaneous Composite Casting – a Feasibility StudyUltrasonics Symposium (IUS), 2012 IEEE International-Proceedings
  • Wallaschek, J.; Saalbach, K.; Twiefel, J. (2013): Soundfield Design for Ultrasonically Assisted Composite CastingProceedings of 11th International Conference on Vibration Problems
  • Wurpts, W.; Bruns, P.; Twiefel, J. (2013): A Transfer Matrix Method for the Design of Resonant Piezoelectric Devices10th International Workshop on Piezoelectric Materials and Applications, Hannover, Germany
  • Bruns, P.; Mojrzisch, S.; Twiefel, J.; Wallaschek, J. (2012): Autoresonant Control of an Electromagnetic Linear Actuator with Piecewise-Linear Restoring Force13th Mechatronics Forum International Conference, Linz, Austria
  • Mojrzisch, S.; Ille, I.; Twiefel J. (2012): Driving methods and control design for high power ultrasonic transducers9th International Workshop on Piezoelectric Materials and Applications in Actuators, Hirosaki, Japan

Contribution to Books

  • Neubauer, M.; Twiefel, J.; Westermann, H.; Wallaschek, J. (2012): Modeling Aspects of Nonlinear Energy Harvesting for Increased BandwidthSmall-Scale Energy Harvesting, Edited by M. Lallert, InTech, Chapter 13
    DOI: 10.5772/52232
    ISBN: 978-953-51-0826-9
  • Richter, B.; Twiefel, J.; Wallaschek, J. (2009): Piezoelectric Equivalent Circuit ModelsIn: Priya, S.; Inman, D. J. (Hrsg.): Energy Harvesting Technologies, pp. 107-128
    DOI: 10.1007/978-0-387-76464-1_4
    ISBN: 978-0-387-76463-4

Vortrag

  • Ohrdes, H.; Twiefel, J. ; Wallaschek, J.; Nogueira, R.; Rosenwinkel, K. H. (2016): A feasibility study on the use of ultrasound for inactivating E. Coli in raw and treated wastewater2nd International Conference on Ultrasonic-based Applications: from analysis to synthesis - Ultrasonics 2016

Conferences

  • B. Richter; J. Twiefel; T. Hemsel; J. Wallaschek (2006): Model Based Design of Piezoelectric Generators Utilising Geometrical and Material Properties

Journal

  • Marin, A.; Heitzmann, P.; Twiefel, J.; Priya, S. (2012): Improved pen harvester for powering a pulse rate sensorProc. of SPIE Vol. 8341, 83411D-1
  • Kattenstroth, R.; Harms, H.-H.; Wurpts, W.; Twiefel, J.; Wallaschek, J. (2011): Reibkraftreduktion mittels Ultraschallanregung in der BodenbearbeitungLandtechnik Band 66 Heft 1, pp. 10-13
    DOI: 10.15150/lt.2011.341
  • Zhao, S.; Twiefel, J.; Wallaschek, J. (2009): Design and experimental investigations of high power piezoelectric transducers for a novel squeeze film journal bearingProc. SPIE, Vol. 7288, Active and Passive Smart Structures and Integrated Systems, San Diego, CA, USA
  • Twiefel, J.; Klubal, M.; Paiz, C.; Mojrzisch, S.; Kruger, H. (2008): Digital signal processing for an adaptive phase-locked loop controllerProc. SPIE 6926, 69260A
    DOI: 10.1117/12.776091
  • Twiefel, J.; Potthast, C.; Mracek, M.; Hemsel, T.; Sattel, T.; Wallaschek, J. (2008): Fundamental Experiments as Benchmark Problems for modeling Ultrasonic Micro-Impact ProcessesJournal of Electroceramics, 2008, 20 (3-4), S. 209-214
    DOI: 10.1007/s10832-007-9169-4
  • Twiefel, J.; Richter, B.; Sattel, T.; Wallaschek, J. (2008): Power Output Estimation and Experimental Validation for Piezoelectric Energy Harvesting SystemsJournal of Electroceramics, 2008, 20 (3-4), S. 203-208
    DOI: 10.1007/s10832-007-9168-5
  • Potthast, C.; Twiefel, J.; Wallaschek, J. (2007): Modeling Approaches for an Ultrasonic Percussion DrillJournal of Sound and Vibration, S. 405-417
  • Potthast, C.; Twiefel, J.; Wallaschek, J. (2007): Model based Analysis of an Ultrasonic Percussion DrillIn: ECCOMAS Thematic Conference on Computational Methods in Structural Dynamics and Earthquake Engineering
  • Richter, B.; Twiefel, J.; Hemsel, T.; Wallaschek, J. (2007): Model Based Design of Piezoelectric Generators Utilising Geometrical and Material Properties2006 International Mechanical Engineering Congress & Exposition (IMECE 2006), 5-10 November, Chicago, Illinois, USA
  • Richter, B.; Twiefel, J.; Sattel, T.; Wallaschek, J. (2007): Design Method for Piezoelectric bending Generators in Energy Harvesting SystemsIn: Active and Passive Smart Structures and Integrated Systems 2007, San Diego, USA, SPIE, 2007, Bd. 6525, Nr. 652504
  • Twiefel, J.; Potthast, C.; Mracek, M.; Hemsel, T.; Sattel, T.; Wallaschek, J. (2007): Fundamental Experiments as Benchmark Problems for modelling Ultrasonic Micro-Impact ProcessesJournal of Electroceramics
    DOI: 10.1007/s10832-007-9169-4
    ISBN: ISSN 1385-3449
  • Twiefel, J.; Richter, B.; Sattel, T.; Wallaschek, J. (2007): Power output Estimation and Experimental Validation for Piezoelectric Energy Harvesting SystemsIn: Journal of Electroceramics
    DOI: 10.1007/s10832-007-9168-5
    ISBN: ISSN 1385-3449