Variable stiffness and damping magnetorheological isolator

Zhou, Yang; Wang, Xingyu; Zhang, Xianzhou; Li, Weihua

doi:10.1007/s11465-009-0039-4

Cited by 10 publications

(9 citation statements)

References 17 publications

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“…The stiffness has been varied from 160 to 510 N/mm. In the similar work, Zhou et al 7 implemented adjustable MR damper in parallel with a spring to achieve stiffness variation up to four times. However, with implementation of velocity sensor and MR damper, cost becomes higher.…”

Section: Fitment Of the Real Size Shock Absorbermentioning

confidence: 99%

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Analysis of suspension with variable stiffness and variable damping force for automotive applications

Jugulkar

Singh

Sawant

2016

Advances in Mechanical Engineering

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Passive shock absorbers are designed for standard load condition. These give better vibration isolation performance only for the standard load condition. However, if the sprung mass is lesser than the standard mass, comfort and road holding ability is affected. It is demonstrated that sprung mass acceleration increases by 50%, when the vehicle mass varies by 100 kg. In order to obtain consistent damping performance from the shock absorber, it is essential to vary its stiffness and damping properties. In this article, a variable stiffness system is presented, which comprises of two helical springs and a variable fluid damper. Fluid damper intensity is changed in four discrete levels to achieve variable stiffness of the prototype. Numerical simulations have been performed with MATLAB Simscape and Simulink which have been with experimentation on a prototype. Furthermore, the numerical model of the prototype is used in design of real size shock absorber with variable stiffness and damping. Numerical simulation results on the real size model indicate that the peak acceleration will improve by 15% in comparison to the conventional passive solution, without significant deterioration of road holding ability. Arrangement of sensors and actuators for incorporating the system in a vehicle suspension has also been discussed.

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Section: Fitment Of the Real Size Shock Absorbermentioning

confidence: 99%

“…MR damper system varied the equivalent stiffness from 5500 to 25,000 N/m in two discrete steps. 7 Variable stiffness mechanism has been developed that changes the shock absorber stiffness by moving upper support point of the shock absorber. 2 Simulations were performed on the quarter car testing with 1:10 scaled down model.…”

Section: Introductionmentioning

confidence: 99%

Analysis of suspension with variable stiffness and variable damping force for automotive applications

Jugulkar

Singh

Sawant

2016

Advances in Mechanical Engineering

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“…At present, the industrial revolution triggered by the new round of global scientific and technological revolution has brought unprecedented opportunities and challenges to the development of the automotive industry [1]. The all-round changes in the automotive industry have given birth to historic opportunities [2].…”

Section: Introductionmentioning

confidence: 99%

Analysis of the Business Models of the Intelligent and Connected Vehicle Industry

2020

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Intelligent connected vehicles (ICV) are recognized as a great opportunity with huge social benefits by the global auto industry. Governments of various countries attach great importance to them, and traditional Original Equipment Manufacturer (OEM) and technology companies are also introducing them into consumers’ lives by virtue of various business models, thereby generating practical value. The business model plays a decisive role in determining whether a company can share the ICV market cake and its future position in the industry. More importantly, it will also determine how fast the ICVs can become reality from imagination. In this paper, the ICV industry ecosystem was sorted out, the business models of ICVs adopted by mainstream OEMs were analyzed, and five typical business models were summarized, i.e. platform model, self-transformation model, traditional Tier1 dependence model, alliance model, and outsourcing model. On this basis, the SWOT analysis method was adopted to systematically analyze the internal and external advantages and disadvantages of the five business models, and forward insights on enterprises’ developing and maintaining the competitive advantages in the ICV industry were proposed from five perspectives of technology, market timing, customer experience, brand, and data.

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“…Consequently, it is how to establish strip surface roughness model with high precision and acquire effective control of finished strip materials surface roughness that becomes key points and difficulties for cold tandem rolling technology of stainless steel [4] .…”

Section: Introductionmentioning

confidence: 99%

“…Ma [14] and Nagase [15] et al investigated surface characteristic transfer (or imprinting) in cold rolling, showing the effect of rolling parameters, especially lubricating states. Recently, some researchers [2][3][4]16] have launched the preliminary study on surface roughness model of cold rolling, and given some simple surface roughness regression models. Due to the complexity of the influencing factors on surface roughness, till now, it has been not a very clear understanding into building an apropriate mathematical model to describe surface roughness in cold rolling process of stainless steel strips.…”

Section: Introductionmentioning

confidence: 99%

Mathematical model for strip surface roughness of stainless steel in cold rolling process

Chen¹,

Li²,

Zhu³

et al. 2013

AIP Conference Proceedings

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Surface roughness control is one of the most important subjects during producing stainless steel strips. In this paper, under the conditions of introducing to the concepts of transferring ratio and genetic factor and through the further theoretical analysis, a set of theoretical models about strip surface roughness were put forward in stainless steel cold tandem rolling. Meanwhile, the lubrication experiment in cold rolling process of SUS430 stainless steel strip was carried out in order to comprehensively study surface roughness. The effect of main factors on transferring ratio and genetic factor was analyzed quantitatively, such as reduction, initial thickness, deformation resistance, emulsion technological parameters and so on. Attenuation function equations used for describing roll surface roughness were set up, and also strip surface roughness at the entry of last mill was solved approximately. Ultimately, mathematical model on strip surface roughness for cold tandem rolling of stainless steel was built, and then it was used into the practical production. A great number of statistical results show that experimental data is in excellent agreement with the given regression equations, and exactly, the relative deviation on roughness between calculated and measured is less than 6.34%.

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Variable stiffness and damping magnetorheological isolator

Cited by 10 publications

References 17 publications

Analysis of suspension with variable stiffness and variable damping force for automotive applications

Analysis of suspension with variable stiffness and variable damping force for automotive applications

Analysis of the Business Models of the Intelligent and Connected Vehicle Industry

Mathematical model for strip surface roughness of stainless steel in cold rolling process

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