Title: An optimization technique for the design of a continuously variable transmission control system for automobiles

Authors: D. Yang, A.A. Frank

Addresses: Department of Electrical and Computer Engineering, University of Wisconsin, Madison, USA. ' Department of Electrical and Computer Engineering, University of Wisconsin, Madison, USA

Abstract: A computational method of optimization was used to design the control system of a continuously variable transmission (CVT) car in which there are some nonlinear and unstable components. The engine with an optimum operating line (OOL) is an unstable element in general. The system including a CVT and the unstable engine was stabilized and designed successfully using an optimization technique with quadratic cost functions. The final designed parameters (system gains) of the CVT control system could ensure good stability and controllability, and consequently drivability in the system over the operating range. Compared with the trial-and-error method, it is shown that the optimization technique for designing a highly nonlinear CVT system can significantly reduce the time for system design and gives the optimal result about which one is concerned.

Keywords: continuously variable transmission; CVT; control systems; optimisation; stability; vehicle design.

DOI: 10.1504/IJVD.1985.061344

International Journal of Vehicle Design, 1985 Vol.6 No.1, pp.41 - 54

Available online: 25 May 2014 *

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