Modelling and Optimization of Passive and Semi-active Suspension of a 3 DOF Seat Platform

Segľa, Štefan

doi:10.1007/978-3-030-20131-9_406

Cited by 7 publications

(6 citation statements)

References 6 publications

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“…Þ and letting c e = c 1 + c f , the dynamics equation of the system, equation (5), can be rewritten as…”

Section: Gaussian Equivalent Linearizationmentioning

confidence: 99%

“…[2][3][4] However, due to the higher cost and complexity of these suspensions, the seat suspension market is currently dominated by passive systems. 1,5,6 Different models have been proposed to investigate the dynamic behavior of a passive seat suspension. The majority of these models are lumped-parameter models, and numerical integration techniques are usually adopted for solutions, 7 especially when nonlinearity is incorporated in the model.…”

Section: Introductionmentioning

confidence: 99%

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Multi-objective optimization of vehicle seat suspension with friction under random excitation

Luo

et al. 2021

Proceedings of the Institution of Mechanical Engineers, Part D:

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A seat suspension contributes greatly to vehicle ride comfort as a result of direct contact with the human body. Friction in a seat suspension produces strong non-smooth nonlinearity in seat dynamics, which makes the simulation-based optimization on the seat suspension’s performance time-consuming. This study tries to address parameter optimization on a vehicle seat suspension with the friction force in an analytical approach. A two degrees of freedom model is firstly established for the human body-seat system with friction and subjected to bandlimited random excitation. The nonlinear model is converted into an equivalent linear model by using Gaussian linearization. The dynamic responses of the linear model have then derived analytically and validated by Monte Carlo simulations. Based on the analytical solution, a multi-objective optimization strategy is proposed for the seat suspension. The acceleration of the human body and the suspension travel are chosen as the objective indexes to evaluate seat performance. Simulation results show that the proposed optimization strategy is efficient, where a global optimum is guaranteed owing to the analytical expression of the objective function. The optimization approach taking advantage of model linearization can be applied to similar mechanical systems with friction.

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“…Þ and letting c e = c 1 + c f , the dynamics equation of the system, equation (5), can be rewritten as…”

Section: Gaussian Equivalent Linearizationmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Multi-objective optimization of vehicle seat suspension with friction under random excitation

Luo

et al. 2021

Proceedings of the Institution of Mechanical Engineers, Part D:

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“…16 However, passive mounts can rarely attenuate all of the input vibrations in a system. 17 The active control system control actuators apply forces to the structure in a prescribed manner and have a significant external power source. The range of a force is wider and can achieve better performance, as in Figure 2(c).…”

Section: Introductionmentioning

confidence: 99%

Magnetorheological Elastomer based torsional vibration isolator for application in a prototype drilling shaft

Syam

Muthalif

2021

Journal of Low Frequency Noise, Vibration and Active Control

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Smart materials properties are altered using external stimuli such as temperature, pressure and magnetic field. Magnetorheological Elastomer (MRE) is a type of smart composite material consisting of a polymer matrix embedded with ferromagnetic particles. In the presence of an external magnetic field, its mechanical properties, such as stiffness, change due to the interaction between the magnetic particles, which have applications in vibration isolation. Unwanted vibration in machines can cause severe damage and machine breakdown. In this work, a semi-active vibration isolator using MRE is proposed for a potential application in a drilling system to isolate the torsional vibration. The MRE was fabricated with a 35% mass fraction (MF) consisted of silicon rubber and iron particles. It was fitted with aluminium couplers and attached to the shaft (drill string) to study its efficiency in vibration isolation under a magnetic field. Two tests were conducted on the drilling prototype setup used in this work; the first test was a hammer impact test. The torsional transfer function TTF analysis showed that the system’s natural frequency has shifted from 13.9 Hz to 17.5 Hz by the influence of increasing magnetic field around the MRE. The results showed that the continuous rotational vibration amplitude of the prototype is attenuated by more than 40%.

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“…Vibro-isolation reduces any energy transfer of unwanted dynamic loads (vibration, shocks, impacts) from the source to the surrounding machinery and structures (source isolation, protection against vibration emissions) to dynamically protect other machinery, technological and building structures, as well as people from vibration energy received from their surroundings (isolation of the receiver, protection against immissions). In both cases, passive isolators of dynamic load (vibro-isolators) form a system of masselastic element (energy absorber), whose dynamic transmission is critically influenced by the properties of the source of dynamic load [8]. In practice, recycled resilient materials based on rubber and textile fibers or a combination of both are often used as an elastic element.…”

Section: Introductionmentioning

confidence: 99%

Using of Recycled Materials to Protect the Working and Natural Environment by Reducing Noise and Vibration

Žiaran

Šooš

Chlebo

2020

Strojnícky Časopis - Journal of Mechanical Engineering

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The aim of the article is to define the conditions for the use of recycled resilient materials in the reduction of noise and vibration as an integral part of the mounting and installation of mechanical systems in the work and natural environment. Based on the frequency spectrum, the vibro-isolation efficiency of the vibro-isolators and the viscoelastic materials used is analysed. The solution of this problem is based on the theoretical knowledge and methodology of the transmission of vibration-sound waves. The measurements of the vibration at the sources and along the path of transmission were performed for different recycled materials to compare experimental results with theory.

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Modelling and Optimization of Passive and Semi-active Suspension of a 3 DOF Seat Platform

Cited by 7 publications

References 6 publications

Multi-objective optimization of vehicle seat suspension with friction under random excitation

Multi-objective optimization of vehicle seat suspension with friction under random excitation

Magnetorheological Elastomer based torsional vibration isolator for application in a prototype drilling shaft

Using of Recycled Materials to Protect the Working and Natural Environment by Reducing Noise and Vibration

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