The dynamic response of aircraft landing gear at the moment of landing with regard to smart fluid dampers content MR

Document Type : English


1 Department of Mechanical Engineering, Dashtestan Branch, Islamic Azad University, Boushehr, Iran

2 Department of Mechanical Engineering, College of Mechanical Engineering, Dashtestan branch, Islamic Azad University, Borazjan, Iran


Dynamics and vibrations of the aircraft at the moment of impact with the ground is an important issue in aircraft design and its suspension systems. Different models for spring and damper have been used in the design of aircraft. One of the innovative ideas is MR Fluid Technology in its design. These shock absorbers are actually created a semi-active control system which by setting a magnetic field, the viscosity of the fluid can be adjusted and led to the desired damper so that the vibrations of the aircraft at the moment of landing reach the minimum amount. To achieve this purpose in the present study at First, a passive shock absorber is modeled and then an MR shock absorber which could provide the necessities of a landing gear system, have been analyzed. Finally, after writing the differential equations, the vibrational charts of the passive mode with semi active have been compared and the results confirmed and confirmed.


[1] Currey, N. S. (1988). Aircraft landing gear design: principles and practices. Aiaa.
[2] Batterbee, D. C., Sims, N. D., Stanway, R., & Wolejsza, Z. (2007). Magnetorheological landing gear: 1. A design methodology. Smart materials and Structures16(6), 2429.
[3] Lindler, J. E., Dimock, G. A., & Wereley, N. M. (2000, June). Design of a magnetorheological automotive shock absorber. In Smart Structures and Materials 2000: Smart Structures and Integrated Systems (Vol. 3985, pp. 426-437). International Society for Optics and Photonics.
[4] Carlson, J. D. (2001). Smart Prosthetics Based on MR Fluids. In Proc. 8th Ann. symposium On Smart Structure And Mat. SPIE.
[5] Yang, G., Spencer Jr, B. F., Carlson, J. D., & Sain, M. K. (2002). Large-scale MR fluid dampers: modeling and dynamic performance considerations. Engineering structures24(3), 309-323.
[6] Ahmadian, M., & Norris, J. A. (2008). Experimental analysis of magnetorheological dampers when subjected to impact and shock loading. Communications in Nonlinear Science and Numerical Simulation13(9), 1978-1985.
[7] MikuĊ‚owski, G. (2008). Adaptive impact absorbers based on magnetorheological fluids. IPPT PAN.
[8] Wereley, N. M., Cho, J. U., Choi, Y. T., & Choi, S. B. (2007). Magnetorheological dampers in shear mode. Smart Materials and Structures17(1), 015022.
[9] Abu-Ein, S. Q., Fayyad, S. M., Momani, W., Al-Alawin, A., & Momani, M. (2010). Experimental investigation of using MR fluids in automobiles suspension systems. Research Journal of Applied Sciences, Engineering and Technology2(2), 159-163.
[10] Choi, Y. T., & Wereley, N. M. (2003). Vibration control of a landing gear system featuring electrorheological/magnetorheological fluids. Journal of aircraft40(3), 432-439.
[11] Khani, M. (2010). Magneto-rheological (MR) damper for landing gear system (Doctoral dissertation, Concordia University).