miun.sePublications
Change search
Refine search result
1 - 4 of 4
CiteExportLink to result list
Permanent link
Cite
Citation style
  • apa
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Other style
More styles
Language
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Other locale
More languages
Output format
  • html
  • text
  • asciidoc
  • rtf
Rows per page
  • 5
  • 10
  • 20
  • 50
  • 100
  • 250
Sort
  • Standard (Relevance)
  • Author A-Ö
  • Author Ö-A
  • Title A-Ö
  • Title Ö-A
  • Publication type A-Ö
  • Publication type Ö-A
  • Issued (Oldest first)
  • Issued (Newest first)
  • Created (Oldest first)
  • Created (Newest first)
  • Last updated (Oldest first)
  • Last updated (Newest first)
  • Disputation date (earliest first)
  • Disputation date (latest first)
  • Standard (Relevance)
  • Author A-Ö
  • Author Ö-A
  • Title A-Ö
  • Title Ö-A
  • Publication type A-Ö
  • Publication type Ö-A
  • Issued (Oldest first)
  • Issued (Newest first)
  • Created (Oldest first)
  • Created (Newest first)
  • Last updated (Oldest first)
  • Last updated (Newest first)
  • Disputation date (earliest first)
  • Disputation date (latest first)
Select
The maximal number of hits you can export is 250. When you want to export more records please use the Create feeds function.
  • 1.
    Johannisson, Pontus
    et al.
    RISE Acreo AB, Gothenburg, Sweden.
    Ohlsson, Fredrik
    RISE Acreo AB, Gothenburg, Sweden.
    Rusu, Cristina
    RISE Acreo AB, Gothenburg, Sweden.
    Impact-driven up-conversion in piezoelectric MEMS energy harvesters with pulsed excitation2018In: Journal of Physics, Conference Series, ISSN 1742-6588, E-ISSN 1742-6596, Vol. 1052, no 1, article id 012106Article in journal (Refereed)
    Abstract [en]

    The potential of impact-driven frequency up-conversion in a MEMS EH is evaluated using numerical simulations. The investigated design is compared to a conventional cantilever EH in terms of output power and loss rate. The upshifting can lead to significantly increased output power at a similar loss rate but as the time scale for the loss is long, the benefit is limited. This also requires an effective upshifting process. The design of the impact introduces a length scale that must be selected with excitation, gravity, and pre-stress taken into account. This makes this type of EH application-dependent as a non-optimal choice may result in low output power.

  • 2.
    Larsson, S
    et al.
    RISE Acreo AB, Sweden.
    Johannisson, P
    RISE Acreo AB, Sweden.
    Kolev, D
    RISE Acreo AB, Sweden.
    Ohlsson, F
    RISE Acreo AB, Sweden.
    Nik, S
    Silex Microsystems AB; IMEC, Belgium.
    Liljeholm, J
    Silex Microsystems AB; KTH, Sweden.
    Ebefors, T
    Silex Microsystems AB; Spinverse AB, Sweden.
    Rusu, Cristina
    Mid Sweden University, Faculty of Science, Technology and Media, Department of Electronics Design. RISE Acreo AB, Sweden.
    Simple method for quality factor estimation in resonating MEMS structures2018In: Journal of Physics, Conference Series, ISSN 1742-6588, E-ISSN 1742-6596, Vol. 1052, no 1, article id 012100Article in journal (Refereed)
    Abstract [en]

    The quality factor of a packaged MEMS resonating structure depends on both the packaging pressure and the structure’s proximity to the walls. This type of mechanical constraints, which causes energy dissipation from the structure to the surrounding air, are applicable for oscillating energy harvesters and should be considered in the design process. However, the modelling of energy losses or the measurements of their direct influence inside a packaged chip is not trivial. In this paper, a simple experimental method to quantify the energy loss in an oscillating MEMS structures due to the surrounding air is described together with preliminary results. The main advantage of the method is the ability to characterize the damping contributions under different vacuum and packaging conditions without requiring any packaging of the harvester chip or fabrication of multiple devices with different cavity depths.

  • 3.
    Ohlsson, Fredrik
    et al.
    RISE Acreo AB, Gothenburg, Sweden.
    Johannisson, Pontus
    RISE Acreo AB, Gothenburg, Sweden.
    Rusu, Cristina
    RISE Acreo AB, Gothenburg, Sweden.
    Shape effects in doubly clamped bridge structures at large deflections2018In: Journal of Physics, Conference Series, ISSN 1742-6588, E-ISSN 1742-6596, Vol. 1052, no 1, article id 012109Article in journal (Refereed)
    Abstract [en]

    The shape of a doubly clamped bridge structure depends on its deflection. At large deflections, where the system exhibits nonlinear behaviour, the shape effect becomes significant. We present a general method, based on variational analysis, for computing corrections to the nominal linear regime shape function. The method is used to compute the first non-trivial correction and quantify the corresponding improvement in the large deflection regime. The model obtained is also validated using FEM simulations.

  • 4.
    Vyas, Agin
    et al.
    Chalmers University of Technology.
    Staaf, Henrik
    Chalmers University of Technology.
    Rusu, Cristina
    Mid Sweden University, Faculty of Science, Technology and Media, Department of Electronics Design. RISE Acreo AB.
    Ebefors, Thorbjörn
    MyVox AB.
    Liljeholm, Jessica
    Silex Microsystems AB.
    Smith, Anderson D
    Chalmers University of Technology.
    Lundgren, Per
    Chalmers University of Technology.
    Enoksson, Peter
    Chalmers University of Technology.
    A Micromachined Coupled-Cantilever for Piezoelectric Energy Harvesters2018In: Micromachines, ISSN 2072-666X, E-ISSN 2072-666X, Vol. 9, no 5Article in journal (Refereed)
    Abstract [en]

    This paper presents a demonstration of the feasibility of fabricating micro-cantilever harvesters with extended stress distribution and enhanced bandwidth by exploiting an M-shaped two-degrees-of-freedom design. The measured mechanical response of the fabricated device displays the predicted dual resonance peak behavior with the fundamental peak at the intended frequency. This design has the features of high energy conversion efficiency in a miniaturized environment where the available vibrational energy varies in frequency. It makes such a design suitable for future large volume production of integrated self powered sensors nodes for the Internet-of-Things.

1 - 4 of 4
CiteExportLink to result list
Permanent link
Cite
Citation style
  • apa
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Other style
More styles
Language
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Other locale
More languages
Output format
  • html
  • text
  • asciidoc
  • rtf