{"title":"Kinematic Analysis of Roll Motion for a Strut\/SLA Suspension System","authors":"Yung Chang Chen, Po Yi Tsai, I An Lai","volume":65,"journal":"International Journal of Aerospace and Mechanical Engineering","pagesStart":1009,"pagesEnd":1014,"ISSN":"1307-6892","URL":"https:\/\/publications.waset.org\/pdf\/10842","abstract":"
The roll center is one of the key parameters for designing a suspension. Several driving characteristics are affected significantly by the migration of the roll center during the suspension-s motion. The strut\/SLA (strut\/short-long-arm) suspension, which is widely used in production cars, combines the space-saving characteristics of a MacPherson strut suspension with some of the preferred handling characteristics of an SLA suspension. In this study, a front strut\/SLA suspension is modeled by ADAMS\/Car software. Kinematic roll analysis is then employed to investigate how the rolling characteristics change under the wheel travel and steering input. The related parameters, including the roll center height, roll camber gain, toe change, scrub radius and wheel track width change, are analyzed and discussed. It is found that the strut\/SLA suspension clearly has a higher roll center than strut and SLA suspensions do. The variations in the roll center height under roll analysis are very different as the wheel travel displacement and steering angle are added. The results of the roll camber gain, scrub radius and wheel track width change are considered satisfactory. However, the toe change is too large and needs fine-tuning through a sensitivity analysis.<\/p>\r\n","references":"[1] W. C. Mitchell, R. Simons, T. Sutherland, and K. L. Michael, \"Suspension geometry: theory vs. K&c measurement,\" SAE Technical Paper 2008-01-2948, 2008.\r\n[2] J. S. Hwang, S. R. Kim, and S. Y. Han, \"Kinematic design of a double\r\nwishbone type front suspension mechanism using multi-objective\r\noptimization,\" 5th Australasian Congress on Applied Mechanics, Australia, 2007.\r\n[3] E. K. Janette, Automotive Steering, Suspension, and Wheel Alignment.\r\nSan Jose, CA: Chek Chart, 1993, pp. 226-232.\r\n[4] K. P. Balike, S. Rakheja, and I. Stiharu, \"Synthesis of a vehicle suspension with constrained lateral space using a roll-plane\r\nkineto-dynamic model, SAE Int. J. Mater. Manuf., vol. 3, pp. 305-315,2010.\r\n[5] P. Holdmann, and F. Berger, \"Kinematics and compliance of sports utility\r\nvehicles,\" SAE Technical Paper 2001-01-0491, 2001.\r\n[6] W. C. Mitchell, \"Forced-based roll centers and an improved kinematic\r\nroll center,\" SAE Technical Paper 2006-01-3617, 2006.\r\n[7] L. Li, C. Xia, and W. Qin, \"Analysis of kinetic characteristic and\r\nstructural parameter optimization of multi-link suspension,\" SAE\r\nTechnical Paper 2007-01-3558, 2007.\r\n[8] W. Lamers, \"Development and analysis of a multi-link suspension for racing applications,\" Master-s Thesis, Eindhoven University of Technology, the Netherlands, 2008.\r\n[9] B. P. Minaker, and N. C. Nantais, \"An eigenvector approach to roll centre\r\nanalysis,\" SAE Technical Paper 2007-01-0859, 2008.\r\n[10] Y. C. Chen, H. H. Huang, and J. B. Lin, \"Application of Vector Finite\r\nScrew Analysis to Determine Roll Center from Wheel Points,\" Proc.\r\nIMechE, Part C: J. Mechanical Engineering Science, vol. 225, pp. 2586-2596, 2011.\r\n[11] SAE, Vehicle Dynamics Terminology, SAE J670e, last revised 1976.\r\n[12] W. F. Milliken, and D. L. Milliken, Race Car Vehicle Dynamics, SAE edition, 1995.","publisher":"World Academy of Science, Engineering and Technology","index":"Open Science Index 65, 2012"}