An improvement in the shift quality for automatic manual transmissions using multi-variable linear quadratic optimal control theory. | [Information technology Journal • 2005]

Author(s):

1. Ibrahim A. Amir: State Key Laboratory of Mechanical Transmissions, Chongqing University, Chongqing 400044, P.R. China

2. Qin Datong: State Key Laboratory of Mechanical Transmissions, Chongqing University, Chongqing 400044, P.R. China

3. Liu Zhenjun: State Key Laboratory of Mechanical Transmissions, Chongqing University, Chongqing 400044, P.R. China

4. Ye Ming: State Key Laboratory of Mechanical Transmissions, Chongqing University, Chongqing 400044, P.R. China

Abstract:

Shift quality takes an important role in the automatic manual transmission systems. In order to improve the power performance and acceleration stability, reduce the shift shock and the undesired oscillations of driving output torque of AMT vehicle, this study puts forward a new control strategy based on multivariable Linear Quadratic (LQ) optimal control in estimating the feedback engine torque control. The main idea of this strategy is to obtain a linear quadratic state feedback tracking by solving the optimal control problem. The performance obtained with the proposed controller are compared with those achievable by means of a classical closed loop control strategy. Moreover, different operating conditions are used to test the controller performance. Numerical simulations show the good performance obtained by the proposed controller, which guarantees a decrease of the shift shock in the shift duration, an improve in the acceleration performance while enhance the shift quality.

Page(s): 239-245

DOI: DOI not available

Published: Journal: Information technology Journal, Volume: 4, Issue: 3, Year: 2005

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