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Effect of Chassis Design Factors (CDF) on the Ride Quality Using a Seven Degree of Freedom Vehicle Model
Technical Paper
2004-01-1555
ISSN: 0148-7191, e-ISSN: 2688-3627
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English
Abstract
The kinematics and kinetics of a seven degree of freedom vehicle ride model with independent front and rear suspension are developed. Lagrange's equation is used to obtain the mathematical model of the vehicle. The equations of motion are transformed to state space equations in Linear Time Invariant (LTI) form. The effect of Chassis Design Factors (CDF) such as stabilizer bars, stiffness', Dynamic Index in Pitch (DIP) and mass ratio on the vehicle ride quality are investigated. The ride quality of the 3 dimensional vehicle that includes bounce, pitch, roll and unsprung masses motion is demonstrated in time domain response. The vehicle is considered as a Multi-Input-Multi-Output System (MIMO) subjected to deterministic ground inputs. Outputs of interest for the ride quality investigation are vertical and angular displacement and vertical accelerations. Numerical computer simulation analysis is performed using MATLAB® software. The uniqueness of this research is the implementation of classical mechanics and modern dynamic systems using state-space approach to investigate ride quality. The simulation and analysis are performed using vehicle parameter data of an SUV. The research shows that choosing the appropriate design factors are critical for optimal ride quality.
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Barak, P., Panakanti, N., and Desai, T., "Effect of Chassis Design Factors (CDF) on the Ride Quality Using a Seven Degree of Freedom Vehicle Model," SAE Technical Paper 2004-01-1555, 2004, https://doi.org/10.4271/2004-01-1555.Also In
Vehicle Dynamics and Simulation, Steering and Suspensions on CD-ROM from the SAE 2004 World Congress
Number: SP-1881CD; Published: 2004-03-08
Number: SP-1881CD; Published: 2004-03-08
References
- Shoenberger, R.W. “Human Response to Whole-Body Vibration” Perceptual and Motor Skills 34
- Varterasian, J.H. Thompson R.R. “The Dynamic Characteristics of Automobile Seats with Human Occupants” SAE Paper - 770249
- VanDeusen, B.D. “Human Response to Vehicle Vibrations” SAE Paper - 680090
- Olley. M. “Chassis Design, Principles and Analysis” SAE Publication
- Sun, T. Zhang, Y. Barak, P. “Quarter Vehicle Ride Model.” SAE 2002-01-1581
- Sun, T. Zhang, Y. Barak, P. “4-DOF Vehicle Ride Model.” SAE 2002-01-1580
- Barak, P. “Magic Numbers in Design of Suspensions for Passenger Cars.” SAE - 911921
- Smith C.C. McGhee, D.Y. Healey, A.J. “The Prediction Of Passenger Riding Comfort From Acceleration Data.” Journal of Dynamic Systems, Measurement and Control, Trans ASME 100 1 34 41 1978
- Kamal, M.M. et al. “Modern Automotive Structural Analysis” Van Nostrand Reinhold Company 1982
- Barak, P. Sachs, H. “On The Optimal Ride Control Of A Dynamic Model For A Automotive Vehicle System.” 9 th IAVSD Symposium Linkoping, Sweden 1985
- Wong, J.Y. “Theory of Ground Vehicles” John Wiley & Sons 1978