The Ohio State University

www.osu.edu

  1. Help
  2. Campus map
  3. Find people
  4. Webmail
  5. Search Ohio State

Rajendra Singh

Professor
The Donald D. Glower Chair in Engineering
Director, NSF I/UCRC Smart Vehicle Concepts Center <www.SmartVehicleCenter.org>
Director, Acoustics & Dynamics Laboratory <http://autonvh.org>

BS (Honors) 1971, Birla Institute, Pilani, India
MS 1973, IIT Roorkee, India
Ph.D. 1975, Purdue University

Room E545
201 W. 19th Ave.
Columbus, OH 43210

614-292-9044

Email: singh.3

Web site: http://www.mecheng.osu.edu/adl
Thrust Area(s): Dynamic Systems

Research

Focus of Research and Graduate Education:

  • Machine dynamics, acoustics and vibrations
  • Non-linear dynamics and signal processing
Key Application Areas:
  • Automotive noise, vibration and harshness (NVH) control
  • Geared system dynamics and acoustics (automotive and rotorcraft systems)
  • Smart vehicle concepts

The Acoustics and Dynamics Laboratory is concerned with the analysis, design and synthesis of automotive and mechanical transmission systems for reducing noise, shock and vibration; development of inter-relationships between dynamic forces and motions in rigid or elastic machine elements; study of complex acoustic sources and transmission paths; techniques for passive and active noise control; and digital signal processing for sound quality, system identification, and diagnostics. Since most mechanical systems exhibit significant nonlinearities associated with clearance nonlinearities (such as backlash and multi-staged springs), dry or sliding friction, finite amplitudes, etc., nonlinear dynamic studies are emphasized. Refer to the list of journal publications on http://www.autonvh.org where 170 journal articles (and many conference papers) have been posted; these provide specific information on the knowledge generated. Professor Singh has received several national awards for research and teaching, and 15 of his graduate advisees have won outstanding paper awards. Go to the following link for a listing: http://www.mecheng.ohio-state.edu/docs/FacultyAwardsList.pdf

Major facilities of the Acoustics and Dynamics Laboratory include several two, four and eight channel FFT analyzers, a laser scanning system, modal testing systems, acoustic intensity probes, a hemi-anechoic room, and an assortment of exciters and transducers. Computer-aided analysis, design and testing software, including finite element and boundary element programs are also available.

Selected Publications

Go to http://www.autonvh.org to view journal and conference articles. Some recent journal publications are listed below:

  1. S. He and R. Singh, Dynamic Transmission Error Prediction of Helical Gear Pair under Sliding Friction using Floquet Theory, ASME Journal of Mechanical Design, 30, 2008.
  2. A. Inoue, R. Singh and G. A. Fernandes, Absolute and Relative Path Measures in a Discrete System by Using Two Analytical Methods, Journal of Sound and Vibration, 313, 696,722, 2008.
  3. J. H. Lee and R. Singh, Non-Linear Frequency Responses of Quarter Vehicle Models with Amplitude-Sensitive Engine Mounts, Journal of Sound and Vibration, 313, 784-805, 2008.
  4. C. Duan, T. E. Rook and R. Singh, Sub-harmonic Resonance in a Nearly Pre-loaded Mechanical Oscillator, Nonlinear Dynamics (Special issue on Discontinuous Dynamical Systems), 50(3), 639-650, Nov. 2007.
  5. A. R. Crowther and R. Singh, Analytical Investigation of Stick-Slip Motions in Coupled Brake-Driveline Systems, Nonlinear Dynamics (Special issue on Discontinuous Dynamical Systems), 50(3), 463-481, Nov. 2007.
  6. A. R. Crowther, R. Singh, N. Zhang and C. Chapman, Impulsive Response of an Automatic Transmission System with Multiple Clearances: Formulation, Simulation and Experiment, Journal of Sound and Vibration, 306, 444-466, Oct. 2007.
  7. S. Kim and R. Singh, Gear Surface Roughness Induced Noise Prediction Based on a Linear Time-Varying Model with Sliding Friction, Journal of Vibration and Control, 13(7), 1045-1063, Jul. 2007.
  8. C. Duan and R. Singh, Dynamic Analysis of Preload Non-linearity in a Mechanical Oscillator, Journal of Sound and Vibration, 301, 963-979, Apr. 2007.
  9. S. He, R. Gunda and R. Singh, Effect of Sliding Friction on the Dynamics of Spur Gear Pair with Realistic Time-Varying Stiffness, Journal of Sound and Vibration, 301, 927-949, Apr. 2007.
  10. S. He, R. Gunda and R. Singh, Inclusion of Sliding Friction in Contact Dynamics Model for Helical Gears, ASME Journal of Mechanical Design (Special Supplement on Design of Direct Contact Mechanisms), 129(1), 48-57, Jan. 2007.

   ME @ OSU

Graduate Program Information Session
October 17, 10 a.m. to 1:00 p.m.