Journal of Mechanical Science and Technology

The Korean Society of Mechanical Engineers (대한기계학회)
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Friction Coefficient, Torque Estimation, Smooth Shift Control Law for an Automatic Power Transmission

  • Jeong, Heon-Sul (School of Mechanical Engineering, Kunsan National University) ;
  • Lee, Kyo-Ill (Mechanical Design and Production Engineering Department, Seoul National University)
  • Published : 2000.05.01
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Abstract

For shift quality improvement, torque sensors are currently too expensive to be used on production vehicles. To achieve smooth acceleration shift, the reference trajectory of the clutch slip speed for accomplishing the shift process within a designated shift completion time and its relationship with the clutch actuating torque were suggested by Jeong and Lee (1999). In order to facilitate the proposed algorithm, nonlinear estimators for necessary information such as the axle shaft torque, clutch friction and turbine torque were designed using only speed sensors. Accounting for the modeling error, a control law for this indirect smooth shift was proposed based on the above mentioned suggestions. Simulation results of the proposed estimators and shift controller were presented and further considerations for practical applications are discussed.

Keywords

References

  1. Bastin, G. and Gevers M. R., 1988, 'Stable Adaptive Observers for Nonlinear Time- Varying Systems,' IEEE Trans. on Automatic Control, Vol. 33, No.7, pp. 650-658 https://doi.org/10.1109/9.1273
  2. Burton, J. A. and Zinober, A. S. I., 1986, 'Continuous Approximation of Variable Structure Control,' Int. Journal of Control, Vol. 17, No. 6, pp. 875-885
  3. Chang, S. K., You, W. T. and Hsu, P. L., 1994, 'General Structured Unknown Input Observers,' Proceedings of the 1989 American Control Conference, Baltmore, Maryland, pp. 666-670 https://doi.org/10.1109/ACC.1994.751823
  4. Cho, D., and Hedrick, J. K., 1989a, 'Automotive Powertrain Modeling for Control,' ASME Journal of Dynamic Systems, Measurement and Control, Vol. 111, pp. 568-576
  5. Cho, D., and Hedrick J. K., 1989b, 'Sliding Mode Control for Automotive Powertrains with Uncertain Actuator Models,' Proceedings of the 1989 American Control Conference, Pittsburg, PA, pp. 1046-1052
  6. Friedland, B., 1997, 'A Nonlinear Observer for Estimating Parameters in Dynamic Systems,' Automatica, Vol. 33, No. 8, pp. 1525-1530 https://doi.org/10.1016/S0005-1098(97)00062-9
  7. Friedland, B. and Park, Y. J., 1992, 'On Adaptive Friction Compensation,' IEEE Trans. On Automatic Control, Vol. 37, No. 10, pp. 1609-1612 https://doi.org/10.1109/9.256395
  8. Jeong, H. S., 1993, 'A Study on the Shift Control of a Vehicle Power Transmission System,' Ph. D. Thesis, Dept. of Mechanical Design and Production Engineering, Seoul National University
  9. Jeong, H. S., and Lee, K. I., 1994a, 'A Study on the Design of an Indirect Shift Transient Torque Controller for an Automatic Power Transmission System,' Journal of Korea Society of Automotive Engineers, Vol. 2
  10. Jeong, H. S., and Lee, K. I., 1994b, 'Shift Transient Torque Control of a Vehicle Power Transmission System,' FISITA '94 Congress, pp. 265-271
  11. Jeong, H. S., and Lee, K. I., 1998, 'Efficient Simulation Methods for Automatic Transmission Applying Dynamic Torque Constraints,' Journal of Korea Society of Mechanical Engineers, Vol. 22, No.3, pp. 504-518
  12. Jeong, H-S, Utkin, V. I., 1998, 'Sliding Mode Tracking Control of Systems with Unstable Zero Dynamics,' 5th International Workshop on Variable Structure Systems, Longboat Key Florida, 11-13 pp. 189-194
  13. Jeong, H. S., and Lee, K. I., 1999, 'Shift Characteristics Analysis and Smooth Shift of Automatic Power Transmission,' submitted for International Journal of Korea Society of Mechanical Engineers
  14. Kotwicki, A. J., 1982, 'Dynamic Models for Torque Converter Equipped Vehicles,' SAE Paper No. 82039
  15. Kreisselmeir, G., 1977, 'Adaptive Observers with Exponential Rate of Convergence,' IEEE Trans. on Automatic Control, Vol. 22, No. 1, pp. 2-8
  16. Marino, R., 1990, 'Adaptive Observers for Single Output Nonlinear Systems,' IEEE Trans. on Automatic Control, Vol. 35, No.9, pp. 1054-1058 https://doi.org/10.1109/9.58536
  17. Masmoudi, R. A., and Hedrick, J. K., 1992, 'Estimation of Vehicle Shaft Torque Using Non-linear Observers,' ASME Journal of Dynamic Systems, Measurement and Control, Vol. 114, pp. 394-400
  18. Misawa, E. A. and Hedrick, J. K., 1989, 'Nonlinear Observers-A State-of-the-Art Survey,' ASME Journal of Dynamic Systems, Measurement, and Control , Vol. 111 , No. 3, pp. 344-352
  19. Slotine, J-J. E., Hedrick J. K. and Misawa E. A., 1987, 'On Sliding Observers for Nonlinear Systems,' ASME Journal of Dynamic Systems, Measurement and Control, Vol. 109, pp. 245-251
  20. Takahashi, R. H. and Peres, P. L. D, 1996, 'Unknown Input Observers for Uncertain Systems: A Unifying Approach and Enhancements,' Proceedings of the 35th IEEE Conf. On Decision and Control, Kobe, Japan, pp. 1483-1488 https://doi.org/10.1109/CDC.1996.572726
  21. Thein, M. L. and Misawa, E. A., 1995, 'Comparison of the Sliding Observer to Several State Estimators Using a Rotational Inverted Pendulum,' Proceedings of the 34th IEEE Conf. on Decision and Control, Orleans, LA, pp. 3385-3390 https://doi.org/10.1109/CDC.1995.479011
  22. Walcott, B. I., and Zak, S. H., 1987, 'Comparative Study of Non-Linear State Observation Techniques,' Int. Journal of Control, Vol. 45, No. 6, pp. 2109-2132 https://doi.org/10.1080/00207178708933870
  23. Xu, J. X. and Hashimoto, H., 1993, 'Parameter Identification Methodologies Based on Variable Structure Control,' Int. Journal of Control, Vol. 57, No. 5, pp. 1207-1220 https://doi.org/10.1080/00207179308934441