报告一题目：Power optimization of sliding triboelectric energy harvesting device
报告一简介：The study presents an optimization algorithm for developing a sliding triboelectric harvesting energy device. This presentation addresses the challenge of developing such an approach using an external excitation. The size limitations and the ratio of the width of the grating structure of the device provides an excellent opportunity for configuration optimisation depending on the set of input parameters, which in the case of harmonic excitation are its amplitude and frequency. To validate the numerical model an experimental prototype is built and tested. Finite element analysis is used to take into account the edge effect, relevant to the electrical field distribution then the width of the grating structure becomes comparable with its thickness. These effects are incorporated into a dynamic model of the device and used in conjunction with the multidimensional surrogate optimization algorithm to maximize the device's performance considering the device's overall size, different structural sizes, different excitation parameters, the number of hollow-out unit, and other important parameters of the device. Optimization approaches in triboelectric energy harvesting have mostly been carried out within the electrical circuit, optimising its resistance. In this work, optimization involves both the mechanical and electrical components of the device. Some interesting results of optimisation are derived for the first time based on the optimisation results. It is show that in some cases the optimisation may increase the power output of the triboelectric device by 300%.
Dr. Yurchenko is interested in Nonlinear and Stochastic Dynamics, Control Theory, Vibration, Stability and Bifurcation Analysis, Mathematical and Experimental Modelling of complex dynamic systems with application in energy harvesting. In 2001 he obtained a PhD degree in Mechanical Engineering from Worcester Polytechnic Institute, USA on the development of stochastic optimal control theory and analysis of non-smooth systems and accepted the position of Assistant Professor at the University of Miami. In 2005 he was offered a post of Associate Professor at the Department of Mathematical Sciences of Saint-Petersburgh State Polytechnic University, Russia. He received a Doctor of Science degree (habilitation) in 2007 and in 2008 he received a Young Scientists Award from the Russian President Science Council. In 2008 he was promoted to a full Professor and became a deputy head of the MS program in Mechanics. In 2010 Dr. Yurchenko joined the Mechanical Engineering Department of Heriot-Watt University as an Associate Professor, leading the research work in Dynamics and Control theory, then later he moves to the University of Southampton. Dr. Yurchenko has published over 150 scientific publications including peer reviewed journals and conference proceedings, delivered multiple invited talks and keynote lectures, led a number of industrial projects and received grants from EPSRC and the Royal Society. He is an Editorial board member of Mechanical Systems and Signal Processing, Int. J. of Dynamics and Control, Vibrations, Journal of Vibration Testing and System Dynamics.
报告二题目：Nonlinearity of the interface circuit and energy harvester for piezoelectric energy harvesting