scholarly journals Energy Harvesting From car suspension Using a signle Magnet device

2021 ◽  
Author(s):  
Min-Chie Chiu ◽  
Mansour Karkoub ◽  
Ming-Guo Her
Keyword(s):  
Vibrational Energy ◽  
Renewable Energy Sources ◽  
Excitation Amplitude ◽  
Suspension System ◽  
Comfort Level ◽  
Dissipated Energy ◽  
Car Suspension ◽  
Spring System ◽  
Energy Dissipated ◽  
Mass Spring

The need for renewable energy sources and harvesting devices has increased over the years for environmental and economic reasons. Cars for example have gone through an important transformation in the past decade which led to the inception of the hybrid type. The idea is to harness some of the dissipated energy and reuse it to operate the car. A lot of energy is dissipated from the suspension system; therefore, harnessing that energy could be very useful in powering up electrical systems in the car. A magnetic mass-spring system to harvest the vibrational energy dissipated from the car’s suspension system and three dimensionless comfort levels for the passenger are presented. To maximize the regenerated electricity indicator and minimize the discomfort indices, a multi-objective function based on the above indices in conjunction with the Simulated Annealing method is used. The theoretical developments are demonstrated under constant and varied driving speeds and the simulation results show the energy harvester is capable of producing reasonable amounts of electricity while maintaining a good comfort level. Results reveal that the harvester can generate 0.045 Volts when the car travels at 60 km/h with an acceleration of 0.43 m/s2 and assumed base excitation amplitude of 0.05 m.

scholarly journals Study on an Energy-Harvesting Magnetorheological Damper System in Parallel Configuration for Lightweight Battery-Operated Automobiles

Vibration ◽  
2020 ◽  
Vol 3 (3) ◽  
pp. 162-173
Author(s):  
Urvesh Kabariya ◽  
Sagil James
Keyword(s):  
Energy Harvesting ◽  
Vibrational Energy ◽  
Clean Energy ◽  
Suspension System ◽  
Comfort Level ◽  
Magnetorheological Damper ◽  
Damping Force ◽  
Secondary Systems ◽  
Parallel Configuration ◽  
Energy Dissipated

Suspension dampers are extremely critical for modern automobiles for absorbing vibrational energy while in operation. For years now, the viscous passive damper has been dominant. However, there is a constant need to improve and revolutionize the damping technology to adapt to modern road conditions and for better performance. Controlled shock absorbers capable of adapting to uneven road profiles are required to meet this challenge and enhance the passenger comfort level. Among the many types of modern damping solutions, magnetorheological (MR) dampers have gained prominence, considering their damping force control capability, fast adjustable response, and low energy consumption. Advancements in energy-harvesting technologies allow for the regeneration of a portion of energy dissipated in automotive dampers. While the amount of regenerated energy is often insufficient for regular automobiles, it could prove to be vital to support lightweight battery-operated vehicles. In battery-operated vehicles, this regenerated energy can be used for powering several secondary systems, including lighting, heating, air conditioning, and so on. This research focuses on developing a hybrid smart suspension system that combines the MR damping technology along with an electromagnetic induction (EMI)-based energy-harvesting system for applications in lightweight battery-operated vehicles. The research involves the extensive designing, numerical simulation, fabrication, and testing of the proposed smart suspension system. The development of the proposed damping system would help advance the harvesting of clean energy and enhance the performance and affordability of future battery-operated vehicles.

Energy Harvesting and Damping Capability of Quarter-Car Test Bed

2016 ◽  
Author(s):  
Abdullah A. Algethami ◽  
Won-jong Kim
Keyword(s):  
Energy Harvesting ◽  
Active Control ◽  
Suspension System ◽  
Test Bed ◽  
Efficient System ◽  
Car Suspension ◽  
Significant Interest ◽  
Quarter Car ◽  
Mass Spring ◽  
Damping Capability

Recovering and regenerating power in automotive applications has drawn significant interest recently. A car-suspension system can be modeled as a 2-DOF mass-spring-damper system. Active control used for the car suspension system produces results superior to other methods. In this study, a 3-phase linear generator is used to harvest energy and suppress vibration on a quarter-car suspension setup. The suspension system is analyzed to estimate the harvestable power and damping capability of the generator. Analysis for the generator and its efficiency are presented. Harvestable power of around 105 mW was achieved at a 3.5-Hz input disturbance. The regenerative suspension system can reduce the vibration of the sprung-mass acceleration by up to 22% in an indexed performance. Around 8.4 W used to drive the motor in active control was saved when the regenerative system was used. As a result, much energy can be saved by switching from the active to the energy-harvesting mode. A more efficient system can be designed by matching the mechanical and electromagnetic (EM) damping.

Simulation and Analysis of Two-Mass Suspension Modification Using MATLAB Programming

2019 ◽  
Vol 3 (1) ◽  
pp. 160-165
Author(s):  
Hendry D. Chahyadi
Keyword(s):  
Vibrational Energy ◽  
State Space Model ◽  
Mass System ◽  
Modeling And Analysis ◽  
The Road ◽  
Final Project ◽  
Quarter Car ◽  
Automotive Suspension ◽  
Mass Spring ◽  
Matlab Programming

The designs of automotive suspension system are aiming to avoid vibration generated by road condition interference to the driver. This final project is about a quarter car modeling with simulation modeling and analysis of Two-Mass modeling. Both existing and new modeling are being compared with additional spring in the sprung mass system. MATLAB program is developed to analyze using a state space model. The program developed here can be used for analyzing models of cars and vehicles with 2DOF. The quarter car modelling is basically a mass spring damping system with the car serving as the mass, the suspension coil as the spring, and the shock absorber as the damper. The existing modeling is well-known model for simulating vehicle suspension performance. The spring performs the role of supporting the static weight of the vehicle while the damper helps in dissipating the vibrational energy and limiting the input from the road that is transmitted to the vehicle. The performance of modified modelling by adding extra spring in the sprung mass system provides more comfort to the driver. Later on this project there will be comparison graphic which the output is resulting on the higher level of damping system efficiency that leads to the riding quality.

Thermal imaging of vibrational energy dissipated in a 2D acoustic black hole pit

2021 ◽  
Vol 118 (1) ◽  
pp. 013901
Author(s):  
Thomas Durand-Texte ◽  
Adrien Pelat ◽  
Guillaume Penelet ◽  
François Gautier ◽  
Mathieu Sécail-Géraud
Keyword(s):  
Black Hole ◽  
Thermal Imaging ◽  
Vibrational Energy ◽  
Energy Dissipated

Graphene-Based Resonant Sensors for Detection of Ultra-Fine Nanoparticles: Molecular Dynamics and Nonlocal Elasticity Investigations

NANO ◽  
2015 ◽  
Vol 10 (02) ◽  
pp. 1550024 ◽  
Author(s):  
S. Kamal Jalali ◽  
M. Hassan Naei ◽  
Nicola Maria Pugno
Keyword(s):  
Molecular Dynamics ◽  
Nonlocal Elasticity ◽  
Md Simulations ◽  
Small Scale ◽  
Frequency Shifts ◽  
Resonant Sensors ◽  
Embedded Atom ◽  
Metal Metal ◽  
Spring System ◽  
Mass Spring

Application of single layered graphene sheets (SLGSs) as resonant sensors in detection of ultra-fine nanoparticles (NPs) is investigated via molecular dynamics (MD) and nonlocal elasticity approaches. To take into consideration the effect of geometric nonlinearity, nonlocality and atomic interactions between SLGSs and NPs, a nonlinear nonlocal plate model carrying an attached mass-spring system is introduced and a combination of pseudo-spectral (PS) and integral quadrature (IQ) methods is proposed to numerically determine the frequency shifts caused by the attached metal NPs. In MD simulations, interactions between carbon–carbon, metal–metal and metal–carbon atoms are described by adaptive intermolecular reactive empirical bond order (AIREBO) potential, embedded atom method (EAM), and Lennard–Jones (L–J) potential, respectively. Nonlocal small-scale parameter is calibrated by matching frequency shifts obtained by nonlocal and MD simulation approaches with same vibration amplitude. The influence of nonlinearity, nonlocality and distribution of attached NPs on frequency shifts and sensitivity of the SLGS sensors are discussed in detail.

scholarly journals Reduced Mass-Weighted Proper Decomposition for Modal Analysis

2011 ◽  
Vol 133 (2) ◽  
Author(s):  
Venkata K. Yadalam ◽  
B. F. Feeny
Keyword(s):  
Modal Analysis ◽  
Mass Distribution ◽  
Mass Matrix ◽  
Linear Interpolation ◽  
Modal Identification ◽  
Distributed Parameter ◽  
Arbitrary Mass ◽  
Spring System ◽  
Mass Spring ◽  
Proper Orthogonal

A method of modal analysis by a mass-weighted proper orthogonal decomposition for multi-degree-of-freedom and distributed-parameter systems of arbitrary mass distribution is outlined. The method involves reduced-order modeling of the system mass distribution so that the discretized mass matrix dimension matches the number of sensed quantities, and hence the dimension of the response ensemble and correlation matrix. In this case, the linear interpolation of unsensed displacements is used to reduce the size of the mass matrix. The idea is applied to the modal identification of a mass-spring system and an exponential rod.

Research on a high power density mechanical-electrical-hydraulic regenerative suspension system for high-speed tracked vehicles

2021 ◽  
pp. 095440702110610
Author(s):  
Chao Wang ◽  
Weijie Zhang ◽  
Guosheng Wang ◽  
Yong Guo
Keyword(s):  
Power Density ◽  
High Power ◽  
High Speed ◽  
Excitation Amplitude ◽  
Suspension System ◽  
Level Energy ◽  
High Power Density ◽  
Damping Force ◽  
Tracked Vehicles ◽  
Energy Regeneration

High power density energy regeneration is one of the effective solutions to solve the contradiction between improving the damping performance and energy consumption of active suspension. The hydraulic commutator is used to realize hydraulic rectification and hydraulic variable speed/pump/motor with few teeth difference gear pairs is used to match the speed, combined with permanent magnet motor power generation and power supply to put forward kilowatt level high power density mechanical-electrical-hydraulic regenerative suspension system for high-speed tracked vehicles. The mathematical model and fluid-solid-thermo-magnetic multiphysics coupling model are built to analyze the damping performance and regenerative characteristics of the system under passive and semi-active working conditions. The simulation results show that the damping force of the system increases with the increase of the road excitation amplitude and the semi-active control can be realized by adjusting the duty cycle with the PWM control rectifier module. The high power density mechanical-electrical-hydraulic regenerative suspension system can realize kilowatt level energy regeneration, and the regenerative efficiency is more than 50% under low-frequency excitation. The temperature rise of the system is low during operation, which is helpful to improve the reliability and service life.

scholarly journals Numerical Method of Fabric Dynamics Using Front Tracking and Spring Model

2013 ◽  
Vol 14 (5) ◽  
pp. 1228-1251 ◽  
Author(s):  
Yan Li ◽  
I-Liang Chern ◽  
Joung-Dong Kim ◽  
Xiaolin Li
Keyword(s):  
Upper Bound ◽  
Mesh Size ◽  
Front Tracking ◽  
Time Step ◽  
Mass System ◽  
Ode System ◽  
Spring System ◽  
Fabric Surface ◽  
Mass Spring ◽  
Eigen Frequency

AbstractWe use front tracking data structures and functions to model the dynamic evolution of fabric surface. We represent the fabric surface by a triangulated mesh with preset equilibrium side length. The stretching and wrinkling of the surface are modeled by the mass-spring system. The external driving force is added to the fabric motion through the “Impulse method” which computes the velocity of the point mass by superposition of momentum. The mass-spring system is a nonlinear ODE system. Added by the numerical and computational analysis, we show that the spring system has an upper bound of the eigen frequency. We analyzed the system by considering two spring models and we proved in one case that all eigenvalues are imaginary and there exists an upper bound for the eigen-frequency This upper bound plays an important role in determining the numerical stability and accuracy of the ODE system. Based on this analysis, we analyzed the numerical accuracy and stability of the nonlinear spring mass system for fabric surface and its tangential and normal motion. We used the fourth order Runge-Kutta method to solve the ODE system and showed that the time step is linearly dependent on the mesh size for the system.

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