A new variable stiffness suspension system: passive case

Anubi, Olugbenga Moses; Patel, Darsan; Crane, Carl D.

doi:10.5194/ms-4-139-2013

Cited by 28 publications

(16 citation statements)

References 20 publications

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“…High-performance commercial MR fluids are difficult to settle down under dynamic conditions. 9 Moreover, it provides an expensive solution. Major factors affecting the cost are MR fluids, seals, electromagnets, precision manufacturing, tolerances, sensors for suspension velocity measurement and actuators.…”

Section: Introductionmentioning

confidence: 99%

“…MR elastomers are used in vehicle seat suspension to achieve improved driver body acceleration response. 10,11 Anubi et al 9 performed simulation and experimentation on a variable stiffness suspension. The performance criteria include car body acceleration and tyre deflection.…”

Section: Introductionmentioning

confidence: 99%

“…Variable stiffness and damping isolator proposed by Wang and Meng 8 have proposed MR damper operating in few discrete levels. Anubi et al 9 developed a variable stiffness mechanism comprising of a horizontal control strut and a vertical strut. The attachment point between the shock absorber and chassis has been changed with hydraulic actuator to implement active control on the shock absorber stiffness.…”

Section: Introductionmentioning

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: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

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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“…This paper uses a variable stiffness architecture [17,18] in the suspension system to counteract the overturning moment, thereby enhancing the roll stability of the vehicle. The proposed system can be used in conjunction with existing roll stabilisation methods, provided that there is no significance interfere with the suspension system.…”

Section: Introductionmentioning

confidence: 99%

Roll stabilisation of road vehicles using a variable stiffness suspension system

Anubi

Crane

2013

Vehicle System Dynamics

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A variable stiffness architecture is used in the suspension system to counteract the body roll moment, thereby enhancing the roll stability of the vehicle. The variation of stiffness concept uses the 'reciprocal actuation' to effectively transfer energy between a vertical traditional strut and a horizontal oscillating control mass, thereby improving the energy dissipation of the overall suspension. The lateral dynamics of the system is developed using a bicycle model. The accompanying roll dynamics are also developed and validated using experimental data. The positions of the left and right control masses are sequentially allocated to reduce the effective body roll and roll rate. Simulation results show that the resulting variable stiffness suspension system has more than 50% improvement in roll response over the traditional constant stiffness counterparts. The simulation scenarios examined is the fishhook manoeuvre.

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“…The authors proposed a comfort‐oriented variable‐damping‐and‐stiffness control algorithm, named stroke–speed–threshold–stiffness–control, which overcomes the critical trade‐off between the choice of the stiffness coefficient and the end‐stop hitting. For further reading variable spring stiffness control and their implementation, readers should refer to the following papers that will provide the reader with good implementation ideas regarding variable spring stiffness control.…”

Section: Introductionmentioning

confidence: 99%

Attitude control of full vehicle using variable stiffness suspension control

Tchamna

Lee

Youn

2014

Optim. Control Appl. Meth.

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Summary In this paper, the attitude of a ground vehicle travelling in cornering is controlled using a variable stiffness semi‐active suspension control. The main goal of the variable stiffness semi‐active suspension controller is to track as close as possible the performance of the full‐active suspension control. The work is subdivided into two main parts. At first, making use of optimal control theory, the full‐active suspension control of the full car is designed in various ways, depending on the choices of the state's variables. Afterwards, the variable stiffness control algorithm is derived based on the variable damping semi‐active control concept, except that the variable damping is now replaced by the variable stiffness mechanism. Simulation results using various types of manoeuvre show that, when external body forces are applied to the vehicle, the variable stiffness control tracks the performance of the full‐active control for high damping and stiffness coefficient, and for mild damping and stiffness coefficient, the performance of the variable stiffness control follows that of the skyhook controller. Copyright © 2014 John Wiley & Sons, Ltd.

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A new variable stiffness suspension system: passive case

Cited by 28 publications

References 20 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

Roll stabilisation of road vehicles using a variable stiffness suspension system

Attitude control of full vehicle using variable stiffness suspension control

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