Author, Institution: Chandana Ravikumar, Kaunas University of Technology
Science area, field of science: Technological Sciences, Electrical and Electronics Engineering, T001
Scientific Supervisor: Prof. Dr. Vytautas Markevičius (Kaunas University of Technology, Electrical and Electronics Engineering, T001)
Dissertation Defense Board of Electrical and Electronics Engineering Science Field:
Prof. Dr. Robertas Lukočius (Kaunas University of Technology, Technological Sciences, Electrical and Electronics Engineering, T001) – chairperson
Prof. Dr. Adam Idzkowski (Bialystok University of Technology, Poland, Technological Sciences, Electrical and Electronics Engineering, T001)
Prof. Dr. Hab. Arūnas Lukoševičius (Kaunas University of Technology, Technological Sciences, Electrical and Electronics Engineering, T001)
Prof. Dr. Darius Plonis (Vilnius Gediminas Technical University, Technological Sciences, Electrical and Electronics Engineering, T001)
Prof. Dr. Darius Viržonis (Kaunas University of Technology, Technological Sciences, Electrical and Electronics Engineering, T001)
Dissertation defense meeting will be at Rectorate Hall of Kaunas University of Technology (K. Donelaičio 73-402, Kaunas)
The doctoral dissertation is available at the library of Kaunas University of Technology (Gedimino 50, Kaunas)
Annotation: The most important responsibility of piezoelectric vibration power harvesting (PVEH) devices is to generate electricity reliably as a result of continuous operation of Wi-Fi sensor nodes, which are subjected to mechanical failure time use, storage and transportation There is evidence that 52% of such digital devices fail due to environmental factors that compromise their running-overall performance, reliability and equipment life . The application of the piezoelectric vibration energy harvester (PVEH) is mostly in outdoor uncontrollable environments, where there could be changes in temperature, humidity, atmospheric pressure, rain, wind, ice and snow, corrosive gases, mould, etc such as in cryogenic industries or aerospace applications. Most of the existing works fail to consider the probability of temperature dependence of the generated power and resonant frequency of the PVEH. The power generated by the PVEH is under the influence of these atmospheric conditions along with the additional effect of the functional size and applied dimensions of the constructed PVEH. Continuous thermal and mechanical stress on PVEH can lead to degradation of piezoelectric layer present in the PVEH. Recent research works have highlighted the importance to assess the reliability of the PVEH. This study focuses on building a reliable PVEH from scratch with the help of geometry parametric sweep analysis, temperature dependence studies, fatigue analysis and thermocycling experiments. A combination of simulation and practical experiments are conducted to performs this analysis.
June 20 d. 11:00
Rectorate Hall at Kaunas University of Technology (K. Donelaičio 73-402, Kaunas)
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