Physical modeling and experimental verification of magneto-rheological damper under medium and high frequency excitation

Xu, Fanghui; Dong, Dawei; Huang, Yan; Song, Shizhe; Yan, Bing

doi:10.1177/1464420720966007

Cited by 9 publications

(5 citation statements)

References 29 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…33,34,44 The compressibility and inertia of the fluid are now the major factors that affect output characteristics. A detailed physical model capable of analyzing the high-frequency hardening of MR dampers was derived by our previous study, 45 based on hydraulic fluid mechanics. The relationship between the pressure difference p g and the peak flow rate v 0 was shown as where a , b , d , e , f , p and q are coefficients expressed as The meaning of the variables used in equations (5) and (6) can be found in Table 1.…”

Section: Modeling Of Mr Dampersmentioning

confidence: 99%

A comprehensive optimal design method for magnetorheological dampers utilized in DMU power package

Dong

Huang

et al. 2021

Proceedings of the Institution of Mechanical Engineers, Part L:

Self Cite

View full text Add to dashboard Cite

The diesel multiple unit (DMU) has been widely used in high-speed railway service due to its flexibility and economy. Considering the broadband and complex vibration generated by DMU power package, the advanced semi-active suspension with magnetorheological (MR) dampers is introduced to promote anti-vibration performance. In this work, a comprehensive optimal design approach for MR damper used in DMU power package is proposed. Quasi-static modeling process is conducted to obtain MR damper's low-frequency outputs, while its high-frequency damping forces are calculated by physical modeling considering the fluid compressibility and piston assembly inertia. Then the objective functions and optimization variables are determined. Based on response surface and linear correlation analysis, the influence of the optimal variables on the objective functions is discussed. Using reference-point based nondominated sorting approach (NSGA-III), the evolutionary many-objective optimization is conducted. In addition, magnetic design is incorporated into the optimal process to ensure the magnetic flux density in the effective working area. Finally, an optimized MR damper prototype is manufactured and tested. By comparing the experimental damping force with calculated results in both low-frequency and high-frequency ranges, the effectiveness of the presented optimal method for MR dampers is validated.

show abstract

Section: Modeling Of Mr Dampersmentioning

confidence: 99%

A comprehensive optimal design method for magnetorheological dampers utilized in DMU power package

Dong

Huang

et al. 2021

Proceedings of the Institution of Mechanical Engineers, Part L:

Self Cite

View full text Add to dashboard Cite

show abstract

“…It has been proved that the innerto-outer flow channel ratio is greater than 0.65, and the error in using the plate approximation to convert the annular flow channel to a plate model for analysis is less than 1% [21,22]. In addition, combined with different flow modes (shear mode [23,24], flow mode [25], extrusion mode [26,27], and mixed mode [28,29]) and various channel shapes (multi-coil [30][31][32], spiral channel [33,34], curved channel [35,36], multi-parallel channel [37,38], tapered hole-shaped channel [18], bypass channel [39,40]) the flat-plate approximation still can characterize mechanical models well. However, given the conical channel shape of the CFC-MRD structure, the conventional parallel plate model cannot fully capture its flow characteristics.…”

Section: Introductionmentioning

confidence: 99%

Theoretical switch model of novel asymmetric magnetorheological damper for shock and vibration application

Liang,

Fu,

et al. 2023

Smart Mater. Struct.

View full text Add to dashboard Cite

This study proposed a novel asymmetric conical flow channel magnetorheological damper (CFC-MRD) for all-terrain vehicles (ATVs) to handle complex excitations with coexisting shocks and vibrations. CFC-MRD produces adjustable damping forces by utilizing magnetically controlled properties and achieves asymmetric force output (moderate compression force and strong extension force) with conical flow channels. This design could effectively absorb and dissipate energy. The paper first illustrates the structure and asymmetric principle of CFC-MRD. Then, the mechanism of asymmetric force generation in a non-parallel flat plate is derived, and utilizes the hydrodynamic theory to derive the pressure difference of Bingham fluid between the non-parallel plates. Considering the coexistence of vibration and shock, the study proposes a theoretical switch model that distinguishes between low and high velocity states based on the Reynolds number. Finally, the validity of the model is verified by experiments, and the results show that the CFC-MRD achieves the desired asymmetric force output. The asymmetric force ratio rises with higher excitation speed and drops with increased drive current. At a speed of 1 m s−1 without any applied current, the maximum asymmetric force reaches 1.21. The small peak error, averaging only 2.57%, between experimental and theoretical results affirms the accuracy of the proposed switch model.

show abstract

“…To evaluate the potential of MR dampers in structural control applications, a model must be developed to describe the behavior of the MR damper accurately. Both parametric and non-parametric models have been proposed to describe the behavior of MR dampers (Bui et al, 2021; Wang and Liao, 2011; Xu et al, 2021; Yang et al, 2013; Zamani et al, 2019). Parametric models based on mechanical idealizations have been studied by several researchers (Yang et al, 2021; Zhang et al, 2021).…”

Section: Introductionmentioning

confidence: 99%

Experimental and numerical study of the forward and inverse models of an MR gel damper using a GA-optimized neural network

Gong

Tan

Xiong

et al. 2023

Journal of Intelligent Material Systems and Structures

View full text Add to dashboard Cite

In this paper, we present a series of experimental and numerical studies on the performance and modeling of a developed magnetorheological gel (MRG) damper. A bi-directional shear-type damper was designed and fabricated. The MRG damper, which utilizes the gel’s high viscosity, can effectively alleviate the settlement problem inherent in magnetorheological fluid damper applications. Then, dynamic performance experiments were carried out to obtain the damping force with sinusoidal and random displacement excitations. Based on the test results, the forward model of the damper was established using a backpropagation neural network. A genetic algorithm was employed to optimize both the network structure parameters and the initial weight and bias values. Different forward models generated using different training datasets were validated and compared with the RBFNN model and Bouc-Wen model using different test datasets. The validation results indicate that the neural network-based forward model greatly outperforms the RBFNN model and Bouc-Wen model in terms of the estimation performance. The influence of the inputs at previous time has also been investigated. Finally, to generate the command current for controlling the damper, inverse neural network models with optimized structure parameters were established using different training datasets. Validation results with different test datasets indicate that, although the predicted current generated by the inverse models has many high-frequency components, it can still act as an effective damper controller, with the resulting damping force calculated using the predicted current coinciding well with the desired behavior.

show abstract

Physical modeling and experimental verification of magneto-rheological damper under medium and high frequency excitation

Cited by 9 publications

References 29 publications

A comprehensive optimal design method for magnetorheological dampers utilized in DMU power package

A comprehensive optimal design method for magnetorheological dampers utilized in DMU power package

Theoretical switch model of novel asymmetric magnetorheological damper for shock and vibration application

Experimental and numerical study of the forward and inverse models of an MR gel damper using a GA-optimized neural network

Contact Info

Product

Resources

About