details of literature

7/27/2019 Details of Literature

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Title Author

Mixed suspension system for a half car vehicle model

Alessandro Giua, Carla Seatzu,Giampaolo Usai

Optimum design of a passive suspensionsubjected to ac random road excitationtual J.A . Tamboli , S.G .Joshi

Analytical description and optimization of dynamic behaviour of passively suspended

vehicle M. Gobbi and G. Mastinu

Development of Scooter Suspensions for Comfort Optimization

M. Marcacci, C. Limone, P. Bruttini,F. Caratelli and W. Rosellini

Analysis of Passive Suspension Systemusing MATLAB, Simulink and SimScape Kiran Antony

Wheelbase filtering and automobilesuspension tuning for minimising motions inpitch R. S. Sharp

Estimation of Wheel Loads using aMathematical Model and Correlation withVehicle Measurements on Motorcycles

Sivakumar Balakrishnan , ChandanB. Chavan, Karthikeyan Srinivasan,Ravi Kharul, Rakesh Chandra

Frequency-domain method for evaluating theride comfort of a motorcycle

Vittore Cossalter, Alberto Doria,Stefano Garbin and Roberto Lot


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Model

Quarter-car model

two degree of freedom modelfor half the vehicle

Quarter Car model

4 degree of freredom model

Quarter model

half-car model using Autosim

4dof Half-car model in simulink


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Work

Design of mixed suspension system.

studied the effect of the vehicle velocity on the RMSAR , formulated an equation for the excitation PSD, minimised the RMSAR from a ride comfort point of view,compared the RMSAR of a vehicle subjected to actual road excitation withthat predicted using the formulated equation for the PSD.

An optimization process based on Multi Objective Programmin (MOP).The optimalsettings of the relevant vehicle suspension parameters (i.e., tyre radial sti!ness,springsti!ness and damping) are derived either symbolically and/or numerically.Analyses for standard deviation in verticasl force(road holding), Suspension relative displacement

(Working space) and sprung mass acceleration( discomfort)

Defined various parameters involved in analysis of four degree of freedom model.Comparison with actual experimental data is done.

Analyitcal model using MATLAB code , Simulink blocks and Simscape is built.

Using Autosim A half-car model is analysed. Random road excitation was applied tothe model with identical front and rear excitation but with important time delaybetween the two excitations included in the calculations.

The vehicle model in Simulink was subjected to the same input displacement as thetwo-poster rig and simulation was carried out.

Numerical study of motorcycle comfort in the ride range using the frequency-domainmethod.At a givenspeed, the steady-state configuration of the vehicle is evaluatedusing the full nonlinear model, then the equations of motion are linearized and theanalysis is carried out in the frequencydomain


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Conclusionconstraint on the total forces bounds the acceleration on thesprung masses so as to ensure the comfort of passengers and toreduce the risk of loss of contact between between wheels androad.Simulations showed that these constraints are active onlywhen the system state is far from the

An optimisation technique has been suggested for minimising theRMSAR of the vehicle suspension system The e}ect of vehiclevelocity and wheelbase on the RMSAR has been studied andRMSAR is found proportional to the vehicle velocity andinverselyproportional to its wheelbase.Two different road irregularity spectra have been considered( 1S-PSD, 2S-PSD). A theoretically rigorous method based on Multi-Objective Programming and Monotonocity analysis is aplied tofind the best trade-off for conflicting performance indices suchas discomfort, road holding and working space. for this, theoptimal suspension parameters (sti!ness and damping) have tobe set within well-de"ned ranges which have been derived

(numerically) in the paper.

MATLAB, Simulink and Simscape software were similar andresults obtained were same, . But building thesuspension modelusing SimScape was much easier when compared with MATLABcode or

The decoupled configuration with I y = Mb a b continues to bea useful basis for examining and explaining the mechanicsinvolvedfrequency for which the pitch response is minimised liesbetween the two half-car dyeigenfrequencies;exactly where in therange is case dependent

A 4-degree of freedom system vehicle model was created andused for estimation of the sprung and unsprung forces,pitchangle and accelerations at different locations on theframe.The estimated values of the model were found to be closeenough to be used at the model were found to be close enoughto be used at the concept design stage. The model predictedpoor ride comfort for the modified suspension characteristics.

The proposed method is very fast and makes it possible to definea numeric comfort index that depends on the characteristics of the suspensions and can be used for optimization purposes.

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