Publications

Application of Bond Graphs in Modelling of the Energy Harvesting Systems from Vibrating Mechanical Devices

Abstract: This chapter presents the results of computer simulations of the system of energy harvesting from vibrating mechanical devices. Detailed model tests were carried out for the system of cantilever beams coupled with elastic elements. The end of one vibrating element is loaded with a permanent magnet, which defines a non-linear potential characteristic with the…

Multiple Solutions of the Tristable Energy Harvester

Abstract: This paper presents the results of numerical simulations of a non-linear, tristable system for harvesting energy from vibrating mechanical devices. Detailed model tests were carried out inrelation to the system consisting of a beam and three permanent magnets. Based on the derived mathematical model and assuming a range of control parameter variability, a three-dimensional…

Response Identification in a Vibration Energy-Harvesting System with Quasi-Zero Stiffness and Two Potential Wells

Abstract: In this paper, the frequency broadband effect in vibration energy harvesting was studied numerically using a quasi-zero stiffness resonator with two potential wells and piezoelectric transducers. Corresponding solutions were investigated for system excitation harmonics at various frequencies. Solutions for the higher voltage output were collected in specific branches of the power output diagram. Both…

Dynamics of Coupled Nonlinear Oscillators with Mistuning.

Abstract: A four-degree-of-freedom mechanical system composed of two weakly coupled modules with external forcing is modelled and numerically investigated. Each module contains internal vibro-impact oscillator. The mathematical model is built based on the compliant impacts with realistic nonlinear stiffness and damping characteristics. The model of resistance of motion of the modules assumes conditions possible in…

Possibilities of energy harvesting from the suspension system of the internal combustion engine in a vehicle.

Abstract: The automotive industry faces huge challenge in environmental protection by reducing fossil fuels and energy consumption by developing various practical solutions in energy harvesting. The current analysis is related to the diesel engine power supply system in a passenger off-road vehicle for application of the piezoelectric energy harvesting system. Experimental tests were carried out…

Nonlinear vibration mitigation of a crane’s payload using pendulum absorber

Abstract: The paper proposes and investigates nonlinear vibrations mitigation strategies of an externally excited pendulum. This problem is highly relevant to the crane’s payload behavior, which dynamics is typically described by a nonlinear pendulum model. Currently, there are various active control strategies to mitigate swinging vibrations of the payload that require some knowledge on the…

Stochastic analysis of asymmetric monostable harvesters driven by Gaussian white noise with moment differential equations

Abstract: As an effective means to overcome the shortcomings of linear systems only performing well near the resonance frequency, monostable piezoelectric energy harvesters (MPEHs) have been investigated widely in the area of energy harvesting. However, it is difficult to achieve a perfectly symmetric potential energy function due to the asymmetries in magnets and materials. Therefore,…

Impact-based piezoelectric energy harvesting system excited from diesel engine suspension

Abstract: Vibration energy harvesting systems are using real ambient sources of vibration excitation. In our paper, we study the dynamical voltage response of the piezoelectric vibrational energy harvesting system (PVEHs) with a mechanical resonator possessing an amplitude limiter. The PVEHs consist of the cantilever beam with a piezoelectric patch. The proposed system was subjected to…

Hybrid wind energy scavenging by coupling vortex-induced vibrations and galloping

Abstract: This paper presents a hybrid piezoelectric wind energy scavenger with different cross-sectioned bluff bodies, to enhance the energy scavenging performance by coupling both the vortex-induced vibrations (VIV) and galloping phenomena. Theoretical, experimental and computational fluid dynamics (CFD) studies are conducted to investigate the energy scavenger performance with three combinations of the circular and square…