Download or read book Design and Nonlinear Dynamics of Piezoelectric Energy Harvesters written by Hichem Abdelmoula and published by . This book was released on 2017 with total page 462 pages. Available in PDF, EPUB and Kindle. Book excerpt: Second, an innovative control strategy based on energy harvesting for efficiently suppressing galloping oscillations is proposed. The novel design enables the harvester of not only alleviating the oscillations of the primary structure but also enhancing the transformed vibrational energy. An analytical model for the coupled nonlinear dynamical system is established by utilizing the Euler-Lagrange principle and implementing the Galerkin discretization. The impacts of the electrical load resistance and tip mass of the energy harvester on the coupled frequency, damping, and the onset speed of instability of the coupled multi-mode system are investigated in details. The results show that there exists an optimal load resistance for each tip mass which maximizes the onset speed of galloping. For control purposes, it is found that there is a well-defined tip mass of the energy harvester at which the coupled system has the highest onset speed of instability and hence the bluff body has the lowest vibration amplitude for all considered load resistances. However, to efficiently harvest energy and control the bluff body, both the tip mass of the energy harvester and electrical load resistance can be accurately determined.

Download or read book Piezoelectric Energy Harvesting written by Alper Erturk and published by John Wiley & Sons. This book was released on 2011-04-04 with total page 377 pages. Available in PDF, EPUB and Kindle. Book excerpt: The transformation of vibrations into electric energy through the use of piezoelectric devices is an exciting and rapidly developing area of research with a widening range of applications constantly materialising. With Piezoelectric Energy Harvesting, world-leading researchers provide a timely and comprehensive coverage of the electromechanical modelling and applications of piezoelectric energy harvesters. They present principal modelling approaches, synthesizing fundamental material related to mechanical, aerospace, civil, electrical and materials engineering disciplines for vibration-based energy harvesting using piezoelectric transduction. Piezoelectric Energy Harvesting provides the first comprehensive treatment of distributed-parameter electromechanical modelling for piezoelectric energy harvesting with extensive case studies including experimental validations, and is the first book to address modelling of various forms of excitation in piezoelectric energy harvesting, ranging from airflow excitation to moving loads, thus ensuring its relevance to engineers in fields as disparate as aerospace engineering and civil engineering. Coverage includes: Analytical and approximate analytical distributed-parameter electromechanical models with illustrative theoretical case studies as well as extensive experimental validations Several problems of piezoelectric energy harvesting ranging from simple harmonic excitation to random vibrations Details of introducing and modelling piezoelectric coupling for various problems Modelling and exploiting nonlinear dynamics for performance enhancement, supported with experimental verifications Applications ranging from moving load excitation of slender bridges to airflow excitation of aeroelastic sections A review of standard nonlinear energy harvesting circuits with modelling aspects.

Download or read book Energy Harvesting from Ambient and Aeroelastic Vibrations written by Abdessattar A. Abdelkefi and published by LAP Lambert Academic Publishing. This book was released on 2012 with total page 200 pages. Available in PDF, EPUB and Kindle. Book excerpt: Converting vibrations to a usable form of energy has been the topic of many recent investigations. The ultimate goal is to convert ambient or aeroelastic vibrations to operate low-power consumption devices, such as microelectromechanical systems, heath monitoring sensors, wireless sensors or replacing small batteries that have a finite life span or would require hard and expensive maintenance. The transduction mechanisms used for transforming vibrations to electric power include: electromagnetic, electrostatic, and piezoelectric mechanisms. Because it can be used to harvest energy over a wide range of frequencies and because of its ease of application, the piezoelectric option has attracted significant interest. In this book, we investigate the performance of different types of piezoelectric energy harvesters. The objective is to design and enhance the performance of these harvesters. To this end, distributed-parameter and phenomenological models of these harvesters are developed. Global analysis of these models is then performed using modern methods of nonlinear dynamics.

Download or read book Topics in Nonlinear Mechanics and Physics written by Mohamed Belhaq and published by Springer. This book was released on 2019-08-14 with total page 309 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book presents a selection of contributions from the 4th International Conference on Structural Nonlinear Dynamics and Diagnostics, reflecting diverse aspects of nonlinear and complex dynamics. Fifteen chapters discuss the latest findings and applications in active research areas in nonlinear mechanics and physics. These includes the dynamics of ships with liquid sloshing interaction, dynamics of drops and bubbles, nonlinear drying processes, suppression of time-delayed induced vibrations, dynamics of robotic systems, chaos detection in rolling element, dynamics of a planetary gear system with faults, vibro-impact systems, complex fractional moments for nonlinear systems, oscillations under hysteretic conditions, as well as topics in nonlinear energy harvesting and control.

Download or read book Mechanical Design of Piezoelectric Energy Harvesters written by Qingsong Xu and published by Academic Press. This book was released on 2021-10-22 with total page 290 pages. Available in PDF, EPUB and Kindle. Book excerpt: Mechanical Design of Piezoelectric Energy Harvesters: Generating Electricity from Human Walking provides the state-of-the-art, recent mechanical designs of piezoelectric energy harvesters based on piezoelectric stacks. The book discusses innovative mechanism designs for energy harvesting from multidimensional force excitation, such as human walking, which offers higher energy density. Coverage includes analytical modeling, optimal design, simulation study, prototype fabrication, and experimental investigation. Detailed examples of their analyses and implementations are provided. The book's authors provide a unique perspective on this field, primarily focusing on novel designs for PZT Energy harvesting in biomedical engineering as well as in integrated multi-stage force amplification frame. This book presents force-amplification compliant mechanism design and force direction-transmission mechanism design. It explores new mechanism design approaches using piezoelectric materials and permanent magnets. Readers can expect to learn how to design new mechanisms to realize multidimensional energy harvesting systems. Provides new mechanical designs of piezoelectric energy harvesters for multidimensional force excitation Contains both theoretical and experimental results Fully supported with real-life examples on design, modeling and implementation of piezoelectric energy harvesting devices

Download or read book Intentional and Inherent Nonlinearities in Piezoelectric Energy Harvesting written by Michele Rosso and published by Springer Nature. This book was released on with total page 141 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Piezoelectric Aeroelastic Energy Harvesting written by Hassan Elahi and published by Elsevier. This book was released on 2021-11-22 with total page 284 pages. Available in PDF, EPUB and Kindle. Book excerpt: Piezoelectric Aeroelastic Energy Harvesting explains the design and implementation of piezoelectric energy harvesting devices based on fluid-structure interaction. There is currently an increase in demand for low power electronic instruments in a range of settings, and recent advances have driven their energy consumption downwards. As a result, the possibility to extract energy from an operational environment is of growing significance to industry and academic research globally. This book solves problems related to the integration of smart structures with the aeroelastic system, addresses the importance of the aerodynamic model on accurate prediction of the performance of the energy harvester, describes the overall effect of the piezoelectric patch on the dynamics of the system, and explains different mechanisms for harvesting energy via fluid-structure interaction. This wealth of innovative technical information is supported by introductory chapters on piezoelectric materials, energy harvesting and circuits, and fluid structure interaction, opening this interdisciplinary topic up for readers with a range of backgrounds. Provides new designs of piezoelectric energy harvesters for fluid-structure interaction Explains how to correctly model aerodynamics for effective aeroelastic energy harvesting Numerical examples allow the reader to practice the design, modeling and implementation of piezoelectric energy harvesting devices

Download or read book Nonlinear Dynamics and Complexity written by Carla M.A. Pinto and published by Springer Nature. This book was released on 2022-10-21 with total page 496 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book collects a range of contributions on nonlinear dynamics and complexity, providing a systematic summary of recent developments, applications, and overall advances in nonlinearity, chaos, and complexity. It presents both theories and techniques in nonlinear systems and complexity and serves as a basis for more research on synchronization and complexity in nonlinear science as well as a mechanism to fast-scatter the new knowledge to scientists, engineers, and students in the corresponding fields. Written by world-renown experts from across the globe, the collection is ideal for researchers, practicing engineers, and students concerned with machinery and controls, manufacturing, and controls.

Download or read book Advances in Energy Harvesting Methods written by Niell Elvin and published by Springer Science & Business Media. This book was released on 2013-02-15 with total page 451 pages. Available in PDF, EPUB and Kindle. Book excerpt: Advances in Energy Harvesting Methods presents a state-of-the-art understanding of diverse aspects of energy harvesting with a focus on: broadband energy conversion, new concepts in electronic circuits, and novel materials. This book covers recent advances in energy harvesting using different transduction mechanisms; these include methods of performance enhancement using nonlinear effects, non-harmonic forms of excitation and non-resonant energy harvesting, fluidic energy harvesting, and advances in both low-power electronics as well as material science. The contributors include a brief literature review of prior research with each chapter for further reference.

Download or read book Flexible Piezoelectric Energy Harvesters and Sensors written by Bin Yang and published by John Wiley & Sons. This book was released on 2022-10-04 with total page 292 pages. Available in PDF, EPUB and Kindle. Book excerpt: Flexible Piezoelectric Energy Harvesters and Sensors A systematic and complete discussion of the latest progress in flexible piezoelectric energy harvesting and sensing technologies In Flexible Piezoelectric Energy Harvesters and Sensors, a team of distinguished researchers delivers a comprehensive exploration of the design methods, working mechanisms, microfabrication processes, and applications of flexible energy harvesters for wearable and implantable devices. The book discusses the monitoring of normal force, shear force, strain, and displacement in flexible sensors, as well as relevant artificial intelligence algorithms. Readers will also find an overview of design and research challenges facing professionals in the field, as well as a variety of perspectives on flexible energy harvesters and sensors. With an extensive focus on the use of flexible piezoelectric material technologies for medical applications, Flexible Piezoelectric Energy Harvesters and Sensors also includes: A thorough introduction to the working principles of piezoelectric devices, including discussions of flexible PEH and piezoelectric sensors Comprehensive treatments of the design of flexible piezoelectric energy harvesters, including the challenges associated with their structural design Fulsome explanations of the fabrication of flexible piezoelectric energy harvesters, including piezoelectric ceramic thin and think films In-depth treatments of cantilever piezoelectric energy harvesters, including optimized cantilever, bimorph, and optimized bimorph PEH Perfect for materials scientists, electronics engineers, and solid-state physicists, Flexible Piezoelectric Energy Harvesters and Sensors will also earn a place in the libraries of sensor developers, and surface physicists.

Download or read book Dynamics and Control of Energy Harvesting Devices written by Xiaokun Ma and published by . This book was released on 2017 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Energy harvesting from the environment has the potential to produce low cost power for portable electronics to homes. This thesis investigates energy harvesting from human motion, air flow, and the sun using model-based design and experimental testing of devices tailored for specific energy harvesting modalities. Specifically, this thesis develops piezoelectric energy harvesters for wearables and heating ventilation and air conditioning (HVAC) ducts and tracking solar energy harvesters using shape memory alloy (SMA) actuators.Piezoelectric energy harvesters typically perform poorly in the low frequency, low amplitude, and intermittent excitation environment of human movement associated with wearables. A piezoelectric compliant mechanism (PCM) energy harvester is designed, modeled, and analyzed that consists of a piezoelectric unimorph clamped at the base and attached to a compliant mechanism at the tip. The compliant mechanism has two flexures that amplify the tip displacement to produce large motion of a proof mass and a low frequency first mode with an efficient (nearly quadratic) shape. The compliant mechanism is fabricated as a separate, relatively rigid frame with flexure hinges, simplifying the fabrication process and surrounding and protecting the piezoelectric unimorph. Comparing the time domain performance based on realistic wrist acceleration data, the PCM produces 6 times more average power than a benchmark proof mass cantilever with the same unimorph area and natural frequency. Experiments with a fabricated PCM energy harvester prototype show that the compliant hinge stiffness can be carefully tuned to enforce a quadratic boundary condition, approaching the theoretical high power output and mode shape efficiency.The bridge structure of the PCM also introduces an axial tensioning nonlinearity that self-limits the response to large amplitude impacts, improving the robustness of the device. A nonlinear model of the PCM energy harvester under large base excitation is derived to determine the maximum power that can be generated by the device. Experiments show that the compliant mechanism introduces a stiffening effect and a much wider bandwidth than the proof mass cantilever design. The PCM outperforms the cantilever in both average power and power-strain sensitivity at high accelerations due to the PCM axial stretching effect and its more uniformstrain distribution.Piezoelectric energy harvesters can also be used to scavenge energy for unattended sensors in HVAC ducts. An aeroelastic energy harvester using a pinned-pinned beam is designed, modeled, and analyzed. Nonlinear Euler-Bernoulli beam theory, a linear piezoelectric constitutive law, and nonlinear pressure dynamics are used to obtain the desired model. Compared with the traditional cantilever beam used by previous researchers, the pinned-pinned beam has a higher frequency limit cycle and more efficient mode shape, which ensure higher power output at the same strain level. The pinned-pinned boundary condition also self-limits the response amplitude, limiting strain in the piezoelectric beam and premature failure. Simulation results show that the pinned-pinned beam can harvest at least 4 times more average power than a cantilever beam with the same maximum strain.Wrist-worn devices often use a magnet on a spinning rotor to interact with a magnet on a piezoelectric cantilever, transferring energy from the rotor to the cantilever. Electrical energy can then be harvested from the cyclically strained piezoelectric material as the vibration transient decays. From the viewpoint of designing the rotor system, it is desirable to model these complex orthogonal interactions by an equivalent damping. The equivalent damping of orthogonal magnetic interactions can be calculated using a simplified model. A magnet connected to an inertia that is moving along one axis can interact with another magnet connected to an inertia that is initially at rest and constrained to move along an orthogonal axis. This orthogonal interaction results in a decreased speed and loss of energy for the moving mass and an increased speed and gain of energy for the initially-stationary mass. The damping predictions are compared with simulation results from an energy harvester consisting of a rotating proof mass that interacts orthogonally with a petal arrangement of piezoelectric bimorph beams.Multi-junction concentrating photovoltaics (CPV) have been pursued as a practical path to achieve high efficiency solar energy harvesting. A novel design consists of a central glass sheet sandwiched by an upper refractive lenslet and a lower reflective lenslet. High efficiency multi-junction microscale photovoltaic cells are transfer-printed onto the central sheet, which is moved by a precision translational microtracking system between the fixed lenslet arrays. SMA is wellknown for durable actuation with small displacements at low cycling speeds and is well-suited to the microtracking application. A one-dimensional SMA model with resistive heating is derived and validated by experiments. Experiments show that the temperature distribution is nonuniform along the SMA wire, so the SMA wire model is segmented to approximate the nonuniform temperature distribution, achieving a better match with experiments. PID control is implemented and the displacement steady-state error is effectively controlled to within 0.05 m.

Download or read book Harnessing Chaos written by Quiney and published by Tredition Gmbh. This book was released on 2024-07-08 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: "Harnessing Chaos: Nonlinear Dynamics in Integrated Energy Harvesting Systems" delves into a new frontier of energy harvesting technology. The title uses "chaos" to represent the complex and unpredictable behavior that can occur in nonlinear systems, which are those where the output is not directly proportional to the input. The book explores how this very characteristic of chaos can be harnessed to improve energy harvesting systems that integrate multiple sources. These integrated systems, combining piezoelectric materials with other energy harvesting techniques like solar or wind power, can potentially become more efficient by exploiting nonlinear dynamics. The book equips engineers and researchers with the knowledge to design and optimize such systems, considering the nonlinear interactions between the different harvesting methods. By understanding and harnessing chaos, researchers can develop more robust and adaptable energy harvesting solutions for a sustainable future. This book is ideal for engineers, physicists, and researchers at the forefront of energy harvesting technologies.

Download or read book Advances in Applied Nonlinear Dynamics Vibration and Control 2023 written by Xingjian Jing and published by Springer Nature. This book was released on with total page 911 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Energy Scavenging for Wireless Sensor Networks written by Shad Roundy and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 219 pages. Available in PDF, EPUB and Kindle. Book excerpt: The vast reduction in size and power consumption of CMOS circuitry has led to a large research effort based around the vision of wireless sensor networks. The proposed networks will be comprised of thousands of small wireless nodes that operate in a multi-hop fashion, replacing long transmission distances with many low power, low cost wireless devices. The result will be the creation of an intelligent environment responding to its inhabitants and ambient conditions. Wireless devices currently being designed and built for use in such environments typically run on batteries. However, as the networks increase in number and the devices decrease in size, the replacement of depleted batteries will not be practical. The cost of replacing batteries in a few devices that make up a small network about once per year is modest. However, the cost of replacing thousands of devices in a single building annually, some of which are in areas difficult to access, is simply not practical. Another approach would be to use a battery that is large enough to last the entire lifetime of the wireless sensor device. However, a battery large enough to last the lifetime of the device would dominate the overall system size and cost, and thus is not very attractive. Alternative methods of powering the devices that will make up the wireless networks are desperately needed.

Download or read book Piezoelectric Energy Harvesting Systems written by Junrui Liang and published by Springer. This book was released on 2024-03-12 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book investigates in detail piezoelectric energy harvesting (PEH) technology, assessing its potential us to replace conventional electrochemical batteries with kinetic energy harvesters as sustainable power supplies in wireless sensor network (WSN) devices and mobile electronics, which are originally exposed to ambient vibration. Studies on PEH have attracted engineers and scientists from various disciplines, such as electrical, mechanical, materials, civil and biomedical engineering. Pursuing a holistic approach, the book establishes a fundamental framework for this topic, while emphasizing the importance of integrated analysis and the significant influence of circuit issues in the design and optimization of PEH systems. This approach will help readers from different disciplines recognize the essential aspects of and milestones towards the optimization of PEH systems in practice. The book is intended for undergraduate and graduate students who are interested in energy harvesting technology, researchers investigating kinetic energy harvesting systems, and structure/circuit design engineers working on self-powered WSNs or other energy harvesting applications.

Download or read book Modeling and Design of Piezocomposite Energy Harvester Systems written by Ahmed Jemai and published by . This book was released on 2017 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Advances in Nonlinear Dynamics Volume III written by Walter Lacarbonara and published by Springer Nature. This book was released on with total page 649 pages. Available in PDF, EPUB and Kindle. Book excerpt: