A comparison of optimal semi-active suspension systems regarding vehicle ride comfort

Koulocheris, Dimitrios; Παπαϊωάννου, Γεώργιος; Chrysos, Emmanouil

doi:10.1088/1757-899x/252/1/012022

Cited by 19 publications

(15 citation statements)

References 7 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Additionally, this model may also include an anti-roll bar with torsional stiffness kAR, which provides a torque MAR proportional to the roll angle φ as in Eq. (7). The degrees of freedom (DOFs) of the model are the roll and heave motions of the sprung and unsprung masses.…”

Section: Half Car Model (Hc1)mentioning

confidence: 99%

“…As far as the anti-roll bar is concerned, the torque it provides is calculated according to the Eq. (7), while the force that the anti-roll bar applies to the wheels is given by the Eq. (8).…”

Section: Half Car Model (Hc1)mentioning

confidence: 99%

“…Koulocheris et al [4] used a halfcar model with degrees of freedoms the vertical displacement and the roll angle of the sprung mass and the displacements of the rear right and left unsprung masses comparing the results of the simulation with tire forces evaluated experimentally. Similar half-car model was used also by Papaioannou et al [5,6] and Koulocheris et al [7,8] including the pitch angle instead of in the dynamic behaviour of the vehicle. Full car models are the most complex ones with seven or eight degrees of freedom offering the most accurate simulation.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Comparative Study of Different Vehicle Models with Respect to Their Dynamic Behavior

Παπαϊωάννου

Dineff

Koulocheris

2019

IJAME

View full text Add to dashboard Cite

Various simulation models are used extensively for the design and the optimisation of vehicle suspension systems, as well as the application of various control algorithms in them. The selection of the most suitable model for these purposes is never explained and many times unnecessary complexity is added in them. In this respect, an assessment regarding the accuracy of the most common vehicle models is conducted. Thus, four vehicle models with various configurations are compared in terms of accuracy. More specifically, both passive and semi active suspensions are employed to the models, while the effect of adding anti-roll bars and tire dampers is also investigated. The transient behaviour of the suspension system and the overall vehicle performance are assessed in terms of ride comfort, vehicle handling and road holding using different road excitations. The results illustrate the ability of lower accuracy models to cope well and that they should be preferred most of the times. Also, anti-roll bars and tire dampers should be neglected when the ride comfort is investigated, whereas they have to be included when simulations regarding road holding are conducted.

show abstract

Section: Half Car Model (Hc1)mentioning

confidence: 99%

Section: Half Car Model (Hc1)mentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Comparative Study of Different Vehicle Models with Respect to Their Dynamic Behavior

Παπαϊωάννου

Dineff

Koulocheris

2019

IJAME

View full text Add to dashboard Cite

show abstract

“…Another controller was proposed by Nie et al, 20 achieving a good trade-off between ride quality and road-holding, by using the properties of the invariant points and employing a novel frequency selector. Besides the study of new control algorithms, researchers have conducted extensive surveys of the available control algorithms emphasizing on different methods, such as: (a) the comparison of simulations with experimental results, 17,22 (b) the analysis in the frequency domain, 23 and (c) the comparison of the Pareto Fronts 24 that occur from the multi-objective optimization of semi-active suspensions.…”

Section: Introductionmentioning

confidence: 99%

Skyhook control strategy for vehicle suspensions based on the distribution of the operational conditions

Παπαϊωάννου

Koulocheris

Velenis

2021

Proceedings of the Institution of Mechanical Engineers, Part D:

Self Cite

View full text Add to dashboard Cite

In this work, a novel distribution-based control strategy of semi-active vehicle suspensions is tested under different conditions. The novelty lies in the use of an appropriate threshold in the operational condition of the control algorithm, with which the operational conditions severity is quantified and the state of the damper is controlled according to the magnitude of the operational conditions and not their sign. The value of the threshold depends on the vibrations induced to the sprung mass by the road profile. In order to be evaluated, the operational conditions of the algorithm are fitted to a t-student distribution. The cumulative distribution function of this distribution is used in order to decrease the fraction of the sample operating with the damper’s stiff state. The strategy is applied to traditional SH control algorithms and is tested using a quarter car model excited by different road excitations. A sensitivity analysis for various threshold values is performed, investigating the impact of adopting the cumulative distribution functioned (CDF) controller to various performance metrics. The results illustrate an increase of up to 13% in the ride comfort of the passengers and increase of 6% in the road holding of the vehicle. Both are achieved by minimizing the switches of the damping ratio up to 80%.

show abstract

“…The response time of MR damper is defined as a time needed to reach 63.2 % of the final force. The paper of Strecker et al (2019) describes the construction of the MR damper with response time up to 1.5 ms. Simulations of systems with MR damper were performed and comparisons of control algorithms were described in several studies (Poussot-Vassal et al, 2011;Koulocheris et al, 2017;McManus et al, 2002). In these articles, the response time of the damper is neglected and thus the results can be distorted.…”

Section: Introductionmentioning

confidence: 99%

Semiactive Seat Suspension for Agricultural Machines

Zindulka¹,

Strecker²,

Jeniš³

2020

Engineering Mechanics 2020

View full text Add to dashboard Cite

This paper deals with the simulation of a seat suspension with a magnetorheological (MR) damper for agricultural machines. The dynamic model of the seat is a single degree of freedom model with non-linear damping characteristics and response time of the damper. In the model, three control algorithms were implementedtwo-state Skyhook, Skyhook linear approximation damper control, and Acceleration Driven Damper control. The excitation signal for the model was a real record of acceleration measured on the frame of the tractor. The suspension quality was compared using a standard deviation of acceleration. Results have proven significant improvement in suspension quality when any of the three mentioned algorithms was used.

show abstract

A comparison of optimal semi-active suspension systems regarding vehicle ride comfort

Cited by 19 publications

References 7 publications

Comparative Study of Different Vehicle Models with Respect to Their Dynamic Behavior

Comparative Study of Different Vehicle Models with Respect to Their Dynamic Behavior

Skyhook control strategy for vehicle suspensions based on the distribution of the operational conditions

Semiactive Seat Suspension for Agricultural Machines

Contact Info

Product

Resources

About