Active Linear Quadratic Gaussian Secondary Suspension Control of Flexible Bodied Railway Vehicle
Passenger comfort has been paramount in the design of suspension systems of high speed cars. To analyze the effect of vibration on vehicle ride quality, a vertical model of a six degree of freedom railway passenger vehicle, with front and rear suspension, is built. It includes car body flexible effects and vertical rigid modes. A second order linear shaping filter is constructed to model Gaussian white noise into random rail excitation. The temporal correlation between the front and rear wheels is given by a second order Pade approximation. The complete track and the vehicle model are then designed. An active secondary suspension system based on a Linear Quadratic Gaussian (LQG) optimal control method is designed. The results show that the LQG control method reduces the vertical acceleration, pitching acceleration and vertical bending vibration of the car body as compared to the passive system.
Digital Object Identifier (DOI): doi.org/10.5281/zenodo.2021613Procedia APA BibTeX Chicago EndNote Harvard JSON MLA RIS XML ISO 690 PDF Downloads 324
 A.G Zolotas, R. M. Goodall, “Modelling and control of railway vehicle suspensions”, Mathematical Methods for Robust and Non-Linear Control: Springer, New York, pp 373-412.
 R.H Fries and B.M. Coffey, “A state-space approach to the synthesis of random vertical and crosslevel rail irregularities,” Journal of Dynamic Systems, Measurements and Control, vol. 112, pp. 83–87, Mar 1990.
 A. Orvnas, “Active Secondary Suspension in Trains: A literature Survey. (Unpublished work style),” unpublished.
 P. Carlbom, “Car body and Passengers in Rail Vehicle Dynamics,” doctoral dissertation, Royal Institute of Technology, Sweden,2000.
 P. Carlbom, “Combining MBS with FEM for rail vehicle dynamics analysis,” Multibody Systems Dynamics, vol. 6, pp. 291-300,2001.
 W.O. Schiehlen, “White noise excitation of road vehicle structures”, Sadhana, vol. 31, part 4, pp 487-503, Aug 2006.
 W.O Schiehlen, “Dynamics of High Speed Vehicles”, International Centre for Mechanical Sciences, Springer-Verlag wein Gmbh, pp 13-60, 1982.
 J. Zhou, G. Shen, H. Zhang and L.Ren, “Application of Modal Parameters on Ride Quality Improvement of Railway Vehicles,” Vehicle Systems Dynamics, vol. 46, pp 629-641, Supplement, 2008.
 L. Jacobsen, R. Ayre, “Engineering Vibrations”, McGraw Hill Series in Mechanical Engineering, McGrawHill,pp 455-496, 1958.
 S. Rao, “Mechanical Vibrations”, Prentice Hall, pp 721-739, 2011.
 P.O. Detwiler, M.L. Nagurka, “Track geometry modelling for rail vehicle studies”, Dynamic Systems: Modelling and Control, ASME DSC-vol 1, pp 325-331, 1985.
 A. Hamid, K. Rasmussen, M. Baluja, T.L. Yang., “Analytical Descriptions of Track Geometry Variations”, office of Research and Development, US Department of Transportation, Federal Railroad Administration, 1983.