Evaluation of the Friction Coefficient from the Dynamometer Test of the Aircraft

Abstract:

The friction force is the most important factor for the design of control unit in a braking system. For a long time, many researchers have been striving to improve the accuracy in the measurements of friction coefficients [1,2]. However, there were many difficulties because the friction coefficients are affected by a number of conditions and parameters, such as normal force, temperature, characteristics of road condition, and weather. For the development of ABS of the aircraft, the HILS (Hardware-In-the-Loop-Simulation) test and dynamometer test were carried out. For the calculation of the friction coefficients, the wheel moment was measured using the load cell mounted on the housing of the wheel. The test conditions were dry and greasy, with friction coefficients of 0.7 and 0.4, respectively. In this paper, the test results of the friction coefficients were represented and the improvement method was suggested.

• Periodical: Key Engineering Materials (Volumes 277-279)
• Pages: 757-764
• DOI: https://doi.org/10.4028/www.scientific.net/KEM.277-279.757
• Online since: January 2005
• Authors: Gui Aee Woo, Jeong Woo Jeon, Ki Chang Lee, Young Joo Kim
• Keywords: Anti-Skid Brake System, Digital Control Unit, Dynamometer Test, Hydraulic Brake System, Wheel Moment, Wheel Speed

References

[1] Sandy M. Stubbs, John A. Tanner : Review of Antiskid and Brake Dynamics Research (Aircraft Safety and Operating Problem Conference, pp.555-568, USA 1980).

[2] B. Ewers, J. Bordeneuve-Guibe, J. P. Garcia, J. Piquim : Expert Supervision of an Anti-Skid Control System of a Commercial Aircraft (Proc. of the 1996 IEEE International Symposium on intelligent Control, pp.420-425, USA 1996).

DOI: 10.1109/isic.1996.556238

[3] J.W. Jeon, G.A. Woo, K.C. Lee, and Y.J. Kim : Real-time HILS Development for the Test of Aircraft ABS System (The Spring Meeting of the Korean Society for Aeronautical and Space Science, pp.470-471, Korea 2003).

[4] J.W. Jeon, K.C. Lee, D.H. Hwang, and Y.J. Kim, Development of a Real-Time Dynamic Simulator for Braking Performance Test of Aircraft with Anti-skid Brake System (Annual Meeting of International Control Automation System, Korea 2002).

DOI: 10.1109/isie.2002.1026344

[5] G.A. Woo, J.W. Jeon, K.C. Lee, and Y.J. Kim : Evaluation of the Friction Coefficient from the Dynamometer Test of the Aircraft (Annual Meeting of International Control Automation System, pp.548-552, Korea 2003).

[6] J.W. Jeon, G.A. Woo, K.C. Lee, and Y.J. Kim : Development of Brake System with ABS Function for Aircraft (Annual Meeting of International Control Automation System, pp.423-427, Korea 2003).