Investigation on energy-regenerative shock absorber with adjustable damping and power for freight wagons

Dong, Liwei; He, Ankang; Guo, Ziheng; Yu, Jie; Zuo, Jianyong

doi:10.1016/j.enconman.2022.115228

Cited by 25 publications

(5 citation statements)

References 43 publications

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“… 28 power electronic interface equipped with the SDA MPPT technique (adaptive control and better performance) Suspension 2Hz, 3mm / 7.3W (Pavg) / 9 Dong et al. 35 Energy-regenerative shock absorber (adjustable system damping and power) Bogie 1.8Hz, 1.35mm / 9W (Pmax) / 10 This work Energy harvesting shock absorber (Easy installation, reliable transmission, high power generation and mechanical efficiency) Suspension 3.5Hz, 7mm 8.9V (Vmax) 1.65W (Pmax) 67.75% …”

Section: Resultsmentioning

confidence: 99%

An energy harvesting shock absorber for powering on-board electrical equipment in freight trains

Wang¹,

Peng²,

Kong³

et al. 2023

iScience

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Section: Resultsmentioning

confidence: 99%

An energy harvesting shock absorber for powering on-board electrical equipment in freight trains

Wang¹,

Peng²,

Kong³

et al. 2023

iScience

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“…Freight railway plays an important role in the transportation of cargo and mineral resources in many countries (Li et al, 2019). In China, more than 70% of coal mine transportation is undertaken by railway, which brings tremendous benefits to national and regional development (Dong et al, 2022a). To further improve transportation efficiency, freight trains with higher speed, larger load-carrying ability, and longer marshaling are expected.…”

Section: Introductionmentioning

confidence: 99%

Mechanically-driven energy harvester in railway freight system: Integrated modeling and performance analysis

Dong

Yu²

2023

Journal of Intelligent Material Systems and Structures

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Vibration energy harvesters (VEHs) convert mechanical energy of unpowered freight wagons into electricity and unlock more smart devices to improve operating conditions. In this paper, the nut-screw-based mechanically-driven VEHs (MD-VEHs) along with several mechanical motion rectifiers (MMRs) are proposed and compared in nonlinear railway freight system. Firstly, the working principles of harvesters with non-MMR, half-wave and full-wave MMRs are researched, and equivalent circuit models are established to better reveal the engagement and disengagement of one-way clutches, followed by the integrated model of wagon-harvester system which studies the suspension vibration response and assesses harvester performance. The harvester equivalent circuit model is validated on a horizontal test bench, and presents a good consistency with test data. In addition, the effects of harvester equivalent damping and inertia on performance are explored systematically. The analysis results indicate that full-wave MMR presents the best power performance under the same parameter configuration. The increase of flywheel inertia will decrease the power generation capacity of non-MMR configuration, but further enhance those of half-wave and full-wave MMRs and narrow the performance gap between both. This analysis based on system coupling will be instructive for the engineering design and application of railway VEHs.

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“…Especially for unpowered railway freight wagons, access to economic power is urgently needed but limited (Dong et al, 2022). Facing the growing demand for self-powered applications in the railway industry, researchers have carried out long-term and in-depth research on high-performance energy harvesters.…”

Section: Introductionmentioning

confidence: 99%

“…More than energy reutilization, vibration energy harvesting technology aims to solve the distributed power supply problem of onboard devices, avoiding the inconvenience caused by the cable installation of traditional power supply or regular replacement of chemical batteries. Especially for unpowered railway freight wagons, access to economic power is urgently needed but limited (Dong et al, 2022). Facing the growing demand for self-powered applications in the railway industry, researchers have carried out long-term and in-depth research on high-performance energy harvesters.…”

Section: Introductionmentioning

confidence: 99%

Energy harvesting potential assessment and systematic design for energy-regenerative shock absorbers on railway freight wagons

Dong,

Zhang,

et al. 2023

Journal of Intelligent Material Systems and Structures

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A large amount of vibration energy is dissipated in the secondary suspension systems of railway freight wagons, which can be harvested as renewable power supplies to serve more smart devices for onboard applications. This paper explores the vibration energy harvesting potential of freight wagons and deals with the systematic design issues of energy-regenerative shock absorbers (ERSAs). By considering the ERSA force interaction and realistic track irregularity, a vehicle-track coupled model is established to predict a more accurate vibration response. The parameter sensibility analysis reveals that the operation speed, vehicle load, and track irregularity are the most critical factors that can significantly affect the power generation performance. In addition, vibration energy harvesting potential assessment is conducted on American, German, and Chinese track spectrums and several field-measured freight lines, indicating an average power potential ranging from 33 to 960 W per absorber with a full-loaded freight wagon running at 90 km/h. Finally, a systematic design approach for ERSAs is proposed based on the prior feasibility assessment, a hybrid Grey Wolf Optimization and Particle Swarm Optimization (GWO-PSO) algorithm, and the vehicle-ERSA coupled model. The digital twin of an ERSA has been established and validated by a series of experimental tests. Taking the average power as the objective and setting the suspension vibration velocity, maximum generator rotation velocity, and maximum ERSA force as constraints, the optimized ERSA exhibits an output power of 63 W and 20.22% shock absorption on the secondary suspension. Meanwhile, the GWO-PSO has demonstrated an enhanced exploration ability than the conventional GWO in dealing with the constrained optimization problem of the ERSA design.

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Investigation on energy-regenerative shock absorber with adjustable damping and power for freight wagons

Cited by 25 publications

References 43 publications

An energy harvesting shock absorber for powering on-board electrical equipment in freight trains

An energy harvesting shock absorber for powering on-board electrical equipment in freight trains

Mechanically-driven energy harvester in railway freight system: Integrated modeling and performance analysis

Energy harvesting potential assessment and systematic design for energy-regenerative shock absorbers on railway freight wagons

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