Speakers

Energy harvesting has capability to be a self-power supply to wireless sensors or embedded systems. Energy harvesting from vibration is a vital topic of research. Vibration almost exists in all industrial systems. In order to produce maximum power, a typical harvester is designed to operate at one of its eigenfrequencies. Vibration in the real environment varies along wide spectrum of frequencies and amplitudes. This limits the functionality of the generator to a narrow bandwidth since a slight deviation results in a large drop in output power. Thus, many techniques were proposed to widen the working bandwidth of a vibration harvester. One widely-discussed technique is active tuning of the harvester's resonance frequency. Those tuning procedures in literature were either manually or automatically, but all of them had drawbacks. The manual tuning requires an operator in the working environment. The automatic tuning consumes fairly high power for the actuation and for the frequency sensing. The power consumed in continuous active tuning is mostly higher than the harvested power. There is a need for a tuning mechanism of no power consumption. Therefore, the self-resonating behaviour is applied for energy harvesting. Self-resonating systems are kind of self-adaptive systems which have capability under certain operating conditions to adjust their dynamical characteristics.

Noha is enrolled as PhD student in Mechanical Engineering, Leibniz Universität Hannover. She is employed as an Early-stage researcher in the institute of Dynamics and Vibration Research, funded by ANTARES. Her research focus is the Broadband Piezoelectric Vibration Energy Harvesting. She is involved in research of applying the self-resonating behavior on the energy harvesting for enhanced output power and wide bandwidth.

 

Noha obtained M.Sc. in Mechanical Design and Production from Cairo University, Egypt, 2012. Her Master title was "A self - tuning resonator for vibration energy harvesting: Design, simulation and experimentation". She worked on developing an electromagnetic vibration-based energy harvester with emphasis on increasing the output power. She earned a Diploma in Mechatronics from the Information Technology Institute, Egypt, 2009. She got B.Sc. in Mechanical Design and Production from Benha University, Egypt, 2007.

The Institute of Dynamics and Vibration Research (IDS) is dealing with research and development issues, being the key aspects of the Faculty of Mechanical Engineering. At IDS, there are four groups:

1. dynamics of rotating machinery,

2. elastomer friction and contact mechanics,

3. adaptronic systems and

4. piezoelectric and ultrasound technology

Joining elements are the modeling, simulation and experimental investigation of vibration-related problems and dynamic phenomena. Possible applications range from components in the field of automotive and aircraft engineering, e.g. tires, sealing elements, headlights, assistance systems and engines, components of the energy sector like oil drill strings, stationary gas and steam turbines, towards machine tools and ultrasound-based conveyor, welding and process technology and energy harvesting.