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Rama Sastry, D. V. A.
- Evaluation of Human Exposure to Vibrations using Quarter Car Model with Semi-Active Suspension
Abstract Views :214 |
PDF Views:120
Authors
D. V. A. Rama Sastry
1,
K. V. Ramana
2,
N. Mohan Rao
3,
M. Phani Kumar
2,
V. S. S. Rama Chandra Reddy
2
Affiliations
1 Koneru Lakshmaiah Education Foundation, Vaddeswaram, Guntur, Andhra Pradesh, IN
2 Dept. of Mech. Engg., Koneru Lakshmaiah Education Foundation, Vaddeswaram, Guntur, Andhra Pradesh, IN
3 Dept. of Mech. Engg., University College of Engg., JNTUK University, Kakinada, Andhra Pradesh, IN
1 Koneru Lakshmaiah Education Foundation, Vaddeswaram, Guntur, Andhra Pradesh, IN
2 Dept. of Mech. Engg., Koneru Lakshmaiah Education Foundation, Vaddeswaram, Guntur, Andhra Pradesh, IN
3 Dept. of Mech. Engg., University College of Engg., JNTUK University, Kakinada, Andhra Pradesh, IN
Source
International Journal of Vehicle Structures and Systems, Vol 10, No 4 (2018), Pagination: 268-272Abstract
Exposure of human body to vehicular vibrations in transit may lead to the human discomfort. Ride comfort is one of the major issues in design of automobiles. Magneto rheological (MR) dampers are emerging as most feasible solution for various applications in controlling vibrations. An MR damper is a semi-active device, which will offer the advantages of both active and passive suspension. In this study, the MR damper based semi-active suspension system for a car is analysed for ride comfort of 7 degrees of freedom model human body lumped mass, considering head, upper torso, lower torso and pelvis, seated over a seat of a quarter car model and is compared with that of similar system using passive damper. A MR damper is fabricated and is filled with MR fluid made of Carbonyl iron powder and Silicone oil added with additive. Modified Bouc-Wen Model developed by Spencer is used to model the behaviour of MR damper. All the parameters of this model are identified using data acquired from experiments conducted to characterise MR damper. Further, using the Spencer model of MR damper, the human body seated over quarter car is simulated by implementing a semi-active suspension system for analysing the resulting displacement and acceleration of the human body. The ride comfort performance of vehicle model with passive suspension system is compared with corresponding semi-active suspension system. The simulation and analysis are carried out using MATLAB/SIMULINK.Keywords
Magneto Rheological Dampers, Quarter Car Model, Suspension Systems, Spencer Model, Human Body Vibrations.Full Text
References
- D. Ryba. 1974. Improvements in dynamic characteristics of automobile suspension systems: Part 1 - Two-mass systems, Vehicle System Dynamics, 3(1), 17-46. https://doi.org/10.1080/00423117408968445.
- R. Rajalakshmi, S.R. Kumar, J. Thiyagarajan and A. Vinothkumar. 2017. Evaluation of human exposure to vibration subjected to active suspension actuators, Int. J. Vehicle Structures & Systems, 9(2), 68-71. https://doi.org/10.4273/ijvss.9.2.01.
- J. Wang and G. Meng. 2001. Magneto rheological fluid devices: principles, characteristics and applications in mechanical engineering, Proc. IMechE J. Materials: Design & Applications, 215(3), 165-174.
- R. Turczyn and M. Kciuk. 2008. Preparation and study of model Magneto rheological fluids, J. Achievements in Materials and Manuf. Engg., 27(2), 131-134.
- M. Jolly, J.W. Bender and J.D. Carlson. 1998. Properties and applications of commercial magneto rheological fluids, Proc. SPIE 5th Annual Int. Symposium Smart Structures and Materials, San Diego.
- B.F. Spencer, S. Dyke, M. Sain, and J. Carlson. 1997. Phenomenological model for magneto rheological dampers, ASCE J. Engg. Mech., 1-23.
- V.K. Grag and R.V. Dukkipati. 1984. Dynamics of Railway Vehicle Systems, Academic Press Inc.
- B. Sapiński and J. Filus. 2003. Analysis of parametric models of MR linear damper, J. Theoretical and Applied Mechanics, 41(2), 215-240.
- Analysis and Prediction of Performance of MR Damper at Different Currents and Control Strategies for Quarter Suspension System of a Roadway Vehicle
Abstract Views :532 |
PDF Views:155
Authors
Affiliations
1 Koneru Lakshmaiah Education Foundation, Vaddeswaram, Guntur, Andhra Pradesh, IN
2 University College of Engg., JNTUK University, Kakinada, Andhra Pradesh, IN
1 Koneru Lakshmaiah Education Foundation, Vaddeswaram, Guntur, Andhra Pradesh, IN
2 University College of Engg., JNTUK University, Kakinada, Andhra Pradesh, IN
Source
International Journal of Vehicle Structures and Systems, Vol 11, No 1 (2019), Pagination: 27-32Abstract
Ride comfort and vehicle handling are the two major issues to be dealt in the design of suspension systems of automobiles. With passive systems offering contrariety on these two parameters, the alternative systems are being in study. Magnetorheological (MR) damper, a most feasible semi-active device, is one such alternative, which will offer the advantage of dealing with both these issues overcoming contrariety. In this study, the suspension system of a car using MR damper is analysed at 5 different currents viz., 0A, 0.25A, 0.5A, 0.75A, 1A, using 2DOF quarter car model and 4DOF half car models for ride comfort and handling and the comparisons of these are done with same suspension system equipped with regular passive damper. A MR damper is built-up using MR fluid consisting of carbonyl iron powder and silicone oil added with additive. Further, the characteristic of this damper is established by conducting experiments, which in turn is used to identify the parameters of Spencer model for MR damper. Using Spencer model of MR damper, at 5 different currents, the quarter car and half car models of vehicle suspension system are simulated by implementing a semi-active suspension system for analysing the resulting displacement and acceleration in the car body. The ride comfort and vehicle handling performance of each specific vehicle model with passive suspension system are compared with corresponding skyhook, ground hook and hybrid based semi-active suspension systems. The simulation and analysis are carried out using Matlab/Simulink.Keywords
Magnetorheological Dampers, Semi Active Suspension Systems, Spencer Model, Skyhook, Ground Hook Hybrid Control.Full Text
References
- D. Ryba. 1974. Improvements in dynamic characteristics of automobile suspension systems part 1. Two-mass systems, Vehicle System Dynamics, 3(1), 17-46. https://doi.org/10.1080/00423117408968445.
- R. Rajalakshmi, S. Rajeshkumar, J. Thiyagarajan, A. Vinothkumar. 2017. Evaluation of human exposure to vibration subjected to active suspension actuators, Int. J. Vehicle Structures & Systems, 9(2), 68-71. https://doi.org/10.4273/ijvss.9.2.01.
- J. Wang and G. Meng. 2001. Magnetorheological fluid devices: principles, characteristics and applications in mechanical engineering, IMAHE, J. Materials: Design & Applications, Part L, 215(3), 165-174. https://doi.org/10.1243/1464420011545012.
- R. Turczyn and M. Kciuk. 2008. Preparation and study of model magnetorheological fluids, J. Achievements in Materials and Manuf. Engg., 27(2), 131-134.
- M. Jolly, J.W. Bender and J.D. Carlson. 1998. Properties and applications of commercial magnetorheological fluids, Proc. SPIE 5th Annual Int. Symp. Smart Structures and Materials, San Diego.
- Jr.B.F. Spencer, S. Dyke, M. Sain and J. Carlson. 1997. Phenomenological model for magnetorheological dampers, J. Engg. Mech., 1-23.
- D.V.A.R. Sastry, K.V. Ramana, N.M. Rao, P. Pruthvi and D.U.V. Santhosh. 2016. Analysis of MR damper for quarter and half car suspension systems of a roadway vehicle, Int. J. Vehicle Structures & Systems, 9(1), 17-22.http://dx.doi.org/10.4273/ijvss.9.1.04.
- V.K. Grag and R.V. Dukkipati. 1984.Dynamics of Railway Vehicle Systems, Academic Press Inc.
- D. Karnopp, J. Crosby and R. Harwood. 1973. Vibration Control using Semi-Active Force Generators, Lord Library of Technical Articles, LL-7004.
- S.B. Choi, W. Li, M. Yu, H. Du, J. Fu and P.X. Do. 2016. State of the art of control schemes for smart systems featuring magneto-rheological materials, Smart Mater. Struct., 25. https://doi.org/10.1088/0964-1726/25/4/043001.
- S.M. Savaresi and C. Spelta. 2007. Mixed sky-hook and approaching the filtering limits of a semi-active suspension,J. Dyn. Syst. Meas. Control, 129, 382-392. https://doi.org/10.1115/1.2745846.