Modeling and Active Control of an Air-Cell Seat for Ride-Comfort Improvement

승차감 향상을 위한 에어셀시트의 모델링 및 능동제어

  • 홍금식 (부산대학교 기계공학부) ;
  • 황수환 (현대기아자동차 남양연구소) ;
  • 홍경태 (부산대학교 지능기계공학과) ;
  • 유완석 (부산대학교 기계공학부)
  • Published : 2004.11.01


In this paper, an active vibration control with the use of an air-cell seat for passenger cars is investigated. The roles of the air-cell inserted between the polyurethane foam of the seat and seat cover are first to extend the seat's capability to adopt various shapes of human body and to improve the ride-comfort against road disturbances. The air-cell seat is modeled as a 1-d.o.f. spring-damper system. Because an exact modeling of the air-cell itself is alomost impossible, its dynamic characteristics are analyzed through experiments. A road-adaptive gain-scheduled sky-hook control for the air-cell seat system is proposed. The skyhook gains are scheduled in such a way that the acceleration level transmitted to human body on various road conditions is minimized. Simulations and experimental results are provided.


Air-Cell Seat;Gain Scheduling;Ride Comfort;Road-Adaptive Control;Skyhook Control;Vehicle Control


  1. Choi, S. B. and Han, Y. M., 2003, 'MR Seat Suspension for Vibration Control of a Commercial Vehicle,' Int. J. Veh. Des., Vol. 31, No.2, pp. 202-215
  2. Liu, X. and Wagner, J., 2002, 'Design of a Vibration Isolation Actuator for Automotive Seating Systems -Part I: Modeling and Passive Isolator Performance,' Int. J. Veh. Des., Vol. 29, No.4, pp. 335-356
  3. Liu, X. and Wagner, J., 2002, 'Design of a Vibration Isolation Actuator for Automotive Seating Systems -Part II: Controller Design and Actuator Performance,' Int. J. Veh. Des., Vol. 29, No.4, pp. 357-375
  4. Masaaki, K. and Taro, S., 1998, 'Active Suspension of Truck Seat,' Shock and Vibration, Vol. 5, No. 1, pp. 35-41
  5. Stein, G. J. and Ballo, I., 1991, 'Active Vibration Control Systems for Driver's Seat for Off-Road Vehicle,' Veh. Sys. Dyn., Vol. 20, No. 1, pp. 57-78
  6. Griffin, M. J., 1990, Handbook of Human Vibration, Academic Press.
  7. Lorraine, C. Y. and Khameneh, K., 1999, 'Automotive Seating Foam: Subjective Dynamic Comfort Study,' SAE 1999-01-0629
  8. Dempsey, C. A., 1963, The design of body support and restraint system. In e. Bennett, J. Degan and J. Speigel(eds) Human Factors in 1963 technology, Mcgraw-Hill, NY
  9. Cho, Y. G., Park, S. J. and Yoon, Y. S., 2000, 'Human Response Measurement and Ride Quality Evaluation for Seats Having Various Materia Properties,' Transactions of the KSME, Vol. 8, No.3, pp. 171-180
  10. Rakheja, S., Afework, Y. and Sankar, S., 1994, 'Analytical and Experimental Investigation of the Driver-Seat-Suspension System,' Veh. Sys. Dyn., Vol. 23, No.7, pp. 1513-1531
  11. Stein, G. J., 1997, 'A Driver's Seat with Active Suspension of Electro-pneumatic Type,' ASME J. Vib. Acoust., Vol. 119, No.2, pp. 230-235
  12. Mo, C. K., Sunwoo, M. H. and Patten, W. N., 1999, 'Automotive Seat Vibration Control via Hydraulic Semiactive Vibration Absorbers (SAVA),' KSME Int. J., Vol. 13, No.6, pp. 459-469
  13. Hong, K. S., Sohn, H. C. and Hedrick, J. K., 2002, 'Modified Skyhook Control of Semi-Active Suspensions: A New Model, Gain Scheduling, and Hardware-in-the-Loop Tuning,' ASME J. Dyn. Syst., Meas., Control, Vol. 124, No. 1, pp. 158-167
  14. Park, S. J., 1993, A Study on the Evaluation of Seating Comfort using the Body Pressure Distribution, Ph.D. Thesis, Department of Industrial Engineering, Korea University
  15. Park, S. J., Lee, N. S. and Lee, S. Y., 1993, 'An Investigation of the Relationship between Subjective Comfort Evaluation and Body Pressure Distribution of Vehicle Seats,' Journal of the ESK, Vol. 12, No. 1, pp. 3-15
  16. ISO-2631/1, 1985, 'Evaluation of Human Exposure to Whole-Body Vibration, Part I: General Requirements'
  17. Cho, Y. G, Park, S. J. and Yoon, Y. S., 2000, 'Development of Vertical Biomechanical Model for Evaluating Ride Quality,' Transactions of the KSNVE, Vol. 10, No.2, pp. 269-279
  18. Karnopp, D. C., Crosby, M. J. and Harwood, R. A., 1974, 'Vibration Control Using Semi-Active Force Generators,' ASME J. Eng. Ind., Vol. 96, No.2, pp. 619-626
  19. Robson, J. D., 1979, 'Road Surface Description and Vehicle Response,' Int. J. Veh. Des., Vol. 1, No.1, pp. 25-35