For a new kind of automatic transmissions adopting clutch-to-clutch shift control technology, a clutch pressure observer is proposed to improve the estimation accuracy during the shift torque phase. The observer is designed in the concept of input-to-state stability. Lookup tables, which are widely used to represent the complex nonlinear characteristics of engine systems, appear in their original form in the designed reduced-order observer, and the torsional stiffness of the drive axle shaft is considered in the model-based design procedure to improve the estimation accuracy. Finally, the designed pressure observer is tested on an amesim powertrain simulation model. Comparisons with an observer without considering the drive shaft compliance are given as well.
Issue Section:
Research Papers
Keywords:
clutches,
drives,
engines,
nonlinear control systems,
observers,
power transmission (mechanical),
reduced order systems,
shafts,
automatic transmission,
clutch pressure estimation,
nonlinear estimation,
input-to-state stability
Topics:
Engines,
Pressure,
Torque,
Inertia (Mechanics),
Simulation models,
Errors,
Simulation results,
Sensors,
Modeling,
Design,
Vehicles,
Stiffness,
Stability
1.
Cho
, D.
, 1987, “Nonlinear Control Methods for Automotive Powertrain Systems
,” Ph.D. thesis, Massachusetts Institute of Technology, Cambridge, USA.2.
Matthes
, B.
, and Guenter
, F.
, 2005, “Dual Clutch Transmissions—Lessons Learned and Future Potential
,” SAE Technical Paper No. 2005-01-1021.3.
Minowa
, T.
, Ochi
, T.
, Kuroiwa
, H.
, and Liu
, K.
“Smooth Gear Shift Control Technology for Clutch-to-Clutch Shifting
,” SAE Technical Paper No. 1999-01-1054.4.
Sun
, Z.
, and Hebbale
, K.
, 2005, “Challenges and Opportunities in Automotive Transmission Control
,” Proceedings of the American Control Conference
, Vol. 5
, pp. 3284
–3289
.5.
Hibino
, R.
, Osawa
, M.
, Kono
, K.
, and Yoshizawa
, K.
, 2009, “Robust and Simplified Design of Slip Control System for Torque Converter Lock-Up Clutch
,” ASME J. Dyn. Syst., Meas., Control
, 131
, pp. 1
–10
.6.
Watechagit
, S.
, and Srinivasan
, K.
, 2003, “On-line Estimation of Operating Variables for Stepped Automatic Transmissions
,” IEEE Conference on Control Applications (CCA 2003)
, Vol. 1
, pp. 279
–284
.7.
Misawa
, E.
, and Hedrick
, J.
, 1989, “Nonlinear Observers—A State-of-the-art Survey
,” ASME J. Dyn. Syst., Meas., Control
, 111
, pp. 344
–352
.8.
Masmoudi
, R. A.
, and Hedrick
, K.
, 1992, “Estimation of Vehicle Shaft Torque Using Nonlinear Observers
,” ASME J. Dyn. Syst., Meas., Control
, 114
, pp. 394
–400
.9.
Yi
, K.
, Shin
, B. K.
, and Lee
, K. L.
, 2000, “Estimation of Turbine Torque of Automatic Transmissions Using Nonlinear Observers
,” ASME J. Dyn. Syst., Meas., Control
, 122
, pp. 276
–283
.10.
Watechagit
, S.
, and Srinivasan
, K.
, 2005, “Implementation of On-Line Clutch Pressure Estimation for Stepped Automatic Transmissions
,” Proceedings of the American Control Conference, Vol.
3
, pp. 1607
–1612
.11.
Gao
, B.-Z.
, Chen
, H.
, Zhao
, H.-Y.
, and Sanada
, K.
, 2010, “A Reduced-Order Nonlinear Clutch Pressure Observer for Automatic Transmission
,” IEEE Trans. Control Syst. Technol.
, 18
(2
), pp. 446
–453
.12.
Sontag
, E. D.
, 2005, Input to State Stability: Basic Concepts and Results, (Lecture Notes in Mathematics)
, Springer-Verlag
, Berlin
.13.
Krstić
, M.
, Kanellakopoulos
, I.
, and Kokotović
, P.
, 1995, Nonlinear and Adaptive Control Design
, Wiley-Interscience
, NY
.14.
Khalil
, H.
, 2002, Nonlinear Systems
, Prentice-Hall
, NJ
.15.
Goetz
, M.
, Levesley
, M. C.
, and Crolla
, D. A.
, 2005, “Dynamics and Control of Gearshifts on Twin-Clutch Transmissions
,” Proc. Inst. Mech. Eng., Part D (J. Automob. Eng.)
, 219
(8
), pp. 951
–963
.16.
Gillespie
, T. D.
, 1992, Fundamentals of Vehicle Dynamics
, Society of Automotive Engineers
, NY
.17.
Sanada
, K.
, and Kitagawa
, A.
, 1998, “A Study of Two-Degree-of-Freedom Control of Rotating Speed in an Automatic Transmission, Considering Modeling Errors of a Hydraulic System
,” Control Eng. Pract.
, 6
, pp. 1125
–1132
.18.
Yi
, K.
, Hedrick
, K.
, and Lee
, S. C.
, 1999, “Estimation of Tire-Road Friction Using Observer Based Identifiers
,” Veh. Syst. Dyn.
, 31
(4
), pp. 233
–261
.19.
Moskwa
, J. J.
, and Pan
, C.
, 1995, “Engine Load Torque Estimation Using Nonlinear Observers
,” Proceedings of the 34th IEEE Conference on Decision and Control
, pp. 3397
–3402.
20.
Hahn
, J. O.
, and Lee
, K. I.
, 2002, “Nonlinear Robust Control of Torque Converter Clutch Slip System for Passenger Vehicles Using Advanced Torque Estimation Algorithms
,” Veh. Syst. Dyn.
, 37
(3
), pp. 175
–192
.Copyright © 2012
by American Society of Mechanical Engineers
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