Approximate Solution to Nonlinear Dynamics of a Piezoelectric Energy Harvesting Device Subject to Mechanical Impact and Winkler–Pasternak Foundation

Materials, Journal Year: 2025, Volume and Issue: 18(7), P. 1502 - 1502

Published: March 27, 2025

To explore the nonlinear dynamics of a piezoelectric energy harvesting device, we consider simultaneous parametric and external excitations. Based on Bernoulli-Euler beam theory, new dynamic model is proposed taking into account curvature beam, geometric electro-mechanical coupling nonlinearities, damping nonlinearity, with inextensible deformation. The system discretized by using Galerkin-Bubnov procedure then investigated optimal auxiliary functions method. Explicit analytical expressions approximate solutions are presented for complex problem near primary resonance. main novelty our approach relies presence different functions, involvement few convergence-control parameters, construction initial first iteration, much freedom in selecting obtaining values parameters. Our proves to be very efficient, simple, easy implement, accurate solve complicated dynamical system. study stability equilibrium points, Routh-Hurwitz criterion adopted. Hopf saddle node bifurcations studied. Global analyzed Lyapunov function, La Salle's invariance principle, Pontryagin's principle respect control variables.

Language: Английский

Recent Progress in Energy Harvesting Technologies for Self‐Powered Wearable Devices: The Significance of Polymers

Polymers for Advanced Technologies, Journal Year: 2025, Volume and Issue: 36(4)

Published: April 1, 2025

ABSTRACT The growing demand for self‐powered wearable electronic devices in healthcare, fitness, and entertainment has driven significant advancements energy harvesting technologies. This review explores the latest progress mechanisms that enable sustainable autonomous devices, with a particular emphasis on role of polymers their development. Polymers offer unique combination mechanical flexibility, biocompatibility, lightweight properties, making them ideal applications. systematically categorizes major technologies into three primary mechanisms: thermoelectric generators (TEGs), piezoelectric harvesters (PEHs), triboelectric nanogenerators (TENGs). Each section provides an in‐depth discussion working principles, material innovations, fabrication techniques, applications these systems. Beyond fundamental mechanisms, discusses hybrid systems integrate multiple sources to maximize power generation ensure continuous device operation. storage technologies, such as flexible supercapacitors micro‐batteries, is also highlighted address intermittency challenges ambient sources. Despite progress, remain improving conversion efficiency, enhancing durability, optimizing system integration real‐world identifies key research directions overcoming challenges, including advanced materials engineering, miniaturization artificial intelligence‐driven management strategies. findings presented this provide valuable insights development next‐generation paving way efficient electronics seamlessly daily life.

Language: Английский

Design and Analysis of Piezoelectric Energy Harvester for Wireless Sensor Networks

Lecture notes in computer science, Journal Year: 2024, Volume and Issue: unknown, P. 239 - 254

Published: Oct. 17, 2024

Language: Английский