This paper presents the design of a novel hybrid tri-stable piezoelectric energy harvester (HTPEH) that improves harvesting efficiency harvesters operating at low frequencies. The proposed HTPEH is an extension conventional cantilever with elastic base (TPEH + EB), and it incorporates vertical rotational amplifiers are installed between mass block left end beam side U-shaped frame to enhance system's nonlinear characteristics. By utilizing Hamilton's principle, HTPEH's electromechanical...

This study introduces an innovative asymmetric tri-stable piezoelectric vibration energy harvester (ATPVEH) augmented with elastic base (EB), aimed at optimizing capture from low-orbit vibrations. design incorporates a uniquely configured cantilever beam, positioned within U-shaped block that is further enhanced by base. A strategically placed spring (kf)–mass (Mf) system, situated between the and constrained end of significantly boosts vertical displacement beam during vibrational events....

Piezoelectric energy harvesting faces a primary challenge in effectively capturing low-orbit vibration across broad frequency range. In this paper, we present tri-stable piezoelectric harvester that incorporates dynamic amplifier (TPEH + DM), specifically designed for efficient collection of energy. The TPEH DM comprises cantilever beam connected to an innovative at its restrained end, which enhances both the rotational and lateral displacement simultaneously. governing coupled differential...

The configuration of beam–column joints in precast concrete (PC) building structures varies widely, and different connection methods significantly affect the progressive collapse resistance structure. This study investigates an innovative node frame. Finite element models four-story, two-span space frame made reinforced (RC) PC were developed using ANSYS 14.0/LS-DYNA R5.x software, employing nonlinear dynamic static analysis to examine structural behavior under bottom middle or corner column...

The paper presents an improved hybrid tri-stable cantilever piezoelectric energy harvester based on rotational motion, thus providing a new perspective for achieving higher efficiency in capture motion. proposed system comprises beam with innovative dynamic amplifier installed at the edge of vehicle's wheel hub. Through theoretical analysis and numerical simulations, influence parameters such as mass tip magnetic beam, hub radius, speed, ratio amplifier's spring stiffness are investigated...

Taking into account the gravitational potential energy of piezoelectric harvester, size effect, and rotary inertia tip magnet, a more accurate distributed parametric electromechanical coupling equation tristable cantilever harvester is established by using generalized Hamilton variational principle. The effects magnet spacing, mass thickness ratio layer substrate, load resistance material on performance capture system are studied multiscale method. results show that well depth can be changed...

In order to further improve the vibration energy harvesting efficiency of piezoelectric harvester under low frequency environmental excitation, this paper, based on traditional magnetic tri-stable collector model, proposes a (TPEH+DEM) model with two elastic amplifiers which are installed between U-shaped frame and base fixed end cantilever beam respectively. Based Hamilton principle, motion equation electromechanical coupling TPEH+DEM system is established, analytical solutions...

In this paper, a non-linear tri-stable piezoelectric cantilever energy harvester with novel-type dynamic magnifier was proposed to achieve more effective broadband harvesting under low-level ambient excitations. According the generalized Hamilton principle, mathematical distributed parameter model of proposed. The is system consisting two spring masses, one placed between fixed end beam and L-shaped frame, other, frame base. harmonic balance method adopted work out analytical expressions...

A distributed parametric mathematical model of a new-type dynamic magnifier for bistable cantilever piezoelectric energy harvester is proposed by using the generalized Hamilton principle. The consists two-spring-mass system, one placed between fixed end beam and L-shaped frame, other frame base structure. We used harmonic balance method to obtain analytical expressions steady-state displacement, output voltage, power amplitude system. effect distance magnets, spring stiffness ratio mass two...

Given the geometric nonlinearity of piezoelectric cantilever beam, this study establishes a distributed parameter model nonlinear bi-stable energy harvester, following generalized Hamilton variational principle. The analytical expressions dynamic response were obtained for harvesting system using Galerkin modal decomposition and multi-scale method. investigation focuses on how performance is influenced by gap distance between magnets, external excited amplitude, mechanical damping ratio load...

This paper proposes an asymmetric hybrid tri-stable piezoelectric energy harvester for rotational motion (RHTPEH). The device features cantilever beam positioned at the edge of a rotating disk. is uniquely configured with arrangement magnets. Additionally, elastic amplifier composed vertical and spring connects beam’s fixed end setup enhances both amplitude displacement during motion. A comprehensive dynamical model RHTPEH was developed using Lagrange’s equations. facilitated in-depth...

This study presents a novel design for tri-stable piezoelectric vibration energy harvester with an asymmetric structure, which is enhanced elastic base (TPVEH + EB), meticulously designed to enhance extraction from irregular vibrations in architectural structures. The cornerstone of this the cantilever beam, distinctively arranged within U-shaped block and fortified foundation. A carefully positioned spring (kf)-mass (Mf) system between beam’s fixed end significantly boosts vertical...

A decentralized control scheme can effectively solve the problem of civil engineering structure vibration under earthquake. This paper takes a research into adjacent buildings when earthquake happens. It combines overlapping method and linear matrix inequality (LMI) with <math xmlns="http://www.w3.org/1998/Math/MathML" id="M1"> <msub> <mrow> <mi>H</mi> </mrow> <mi>∞</mi> </msub> </math> algorithm puts forward id="M2"> method. simplified dynamical model structural has been established...

This paper proposes a discrete-time overlapping decentralized guaranteed cost control algorithm via state feedback. Based on the inclusion principle, structure system is decoupled into multiple subsystems, and discretized subsystems’ controllers are designed by using algorithm. Finally, contracted of original system, design completed. method introduced to civil engineering field solve seismic problem for systems building structures with uncertain parameters. The numerical analysis nine-story...