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Configuration Design of Mechanical Structure Coupled with MSMA in Energy Harvesting

Effatpanah Hesari, Mojtaba | 2016

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  1. Type of Document: M.Sc. Thesis
  2. Language: Farsi
  3. Document No: 48974 (08)
  4. University: Sharif University of Technology
  5. Department: Mechanical Engineering
  6. Advisor(s): Sayyadi, Hassan
  7. Abstract:
  8. In recent years, energy harvesting from ambient sources in order to use for low-powered electronics has been considered by many researchers. Wind energy, solar energy, water energy, mechanical energy from vibrations, etc are common sources of ambient energy. In this thesis, optimization of energy harvesting from ambient vibration using magnetic shape memory alloy is presented. To this end, a clamped-clamped beam coupled with MSMA units is considered. A shock load is applied to a proof mass which is attached to the middle of the beam. As a result of beam vibration a longitudinal strain is produced in the MSMA. This strain changes magnetic flux inside the coil connected to MSMA and as a result, an AC voltage is induced in the coil. After obtaining the governing equations, a design optimization is performed to find the optimal shape and configuration of the energy harvester together with the effects of proof mass and bias field. The power output of a vibration energy harvester is known to be sensitive to various uncertainties such as material properties, loading conditions, and geometric tolerances. This paper presents reliability-based design optimization (RBDO) method that demonstrates consistent power generation performance under various uncertainties. As a result, a vibration energy harvester is developed with reliable power generation performance under manufacturing uncertainties
  9. Keywords:
  10. Magnetic Shape Memory Alloys (MSMA) ; Energy Harvesting ; Configuration ; Uncertainty ; Structure Coupled with Alloy ; Reliability Based Design

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