About Me

Ahmad Haidar is a researcher in the Department of Aerospace Engineering at the Pennsylvania State University where he earned his doctorate. He is a Lord Corporation Fellow and president of the Penn State Chapter of the American Helicopter Society.

Ahmad Haidar, AHS Forum 73Research focus:

  • Structural Dynamics
  • Vibration Control
  • Rotordynamics
  • Finite Element Analysis
  • Modeling, Simulation, and Analysis
  • Model Test and Evaluation

Adverse Environment Research Test Systems


Journal Papers

  • Haidar, A. M. and J. Palacios, “Parametric studies on modified configurations of ball-type passive balancers for improved transient and steadystate responses,” Journal of Sound and Vibration, 432C (2018) 633-652. Download Purchase
  • Haidar, A. M. and J. Palacios, “A general model for passive balancing of supercritical shafts with experimental validation of friction and collision effects,” Journal of Sound and Vibration, 384 (2016) 273–293. Download Purchase

Conference Papers

  • Haidar, A. M. and J. Palacios, “Effect of Number of Tracks and Balancing Masses on Passive Balancing Performance”, 2018 AIAA/ASCE/AHS/ASC Structures, Structural Dynamics, and Materials Conference, AIAA SciTech Forum, (AIAA 2018-2214), Jan 2018. Download Purchase
  • Haidar, A. M. and J. Palacios, “Experimental Model Validation of a Passive Balancing Device for Supercritical Helicopter Driveshafts,” American Helicopter Society Forum 72, May 2016. Download Purchase
  • Haidar, A. M. and J. Palacios, “Passive Rotor Blade Balancing System for Unsymmetrical Ice Accretion,” American Institute of Aeronautics and Astronautics Region I Student Conference, 25 April 2014. Download lock

Other Presentations

  • Haidar, A. M. (2018, April), “Real-time Vibration Control of Supercritical Shafts via Passive Bearing.” Presented at the Center for Acoustics and Vibrations (CAV) Technology Transfer Workshop, Pennsylvania State University, University Park, Pa.


  • Haidar, A. M. (2018), “Vibration Control of Shafts via Automatic Passive Balancing,” Ph.D. dissertation, The Pennsylvania State University. Download
  • Haidar, A. M. (2015), “Comprehensive Model and Experimental Validation of Passive Vibration Suppression for Supercritical Rotary Machines,” M.S. thesis, The Pennsylvania State University. Download


Office: 207 Engineering Unit C
Vertical Lift Research Center of Excellence
Pennsylvania State University

Mail: 229 Hammond Building
University Park, Pa 16802