Back-stepping control (BSC), which is deemed effective for a non-holonomic system, is applied to improving both responsiveness and resolution performance of an electronic control throttle (ECT) used in automotive engines. This paper is characterized by the use of a two-step type BSC in a manner that achieves an improvement in responsiveness with the ETC operated in a fully opened state by adding a derivative term in Step 1 and the improvement in resolution performance with the ETC operated in a minutely opened state by adding an adaptive feature in the form of an integral term using the control deviation in Step 2. This paper presents an ECT control expressed as a second-order system including nonlinearities such as backlash of gear train and static friction in sliding area, a BSC system designed based on Lyapunov stability, and a determination method for control parameters. Also, a two-step type BSC system is formulated using Matlab/Simulink with a physics model as a control object. As a result of simulation analyses, it becomes clear that the BSC system can achieve quicker response because the derivative term works effectively and finer resolution because the adaptive control absorbs the error margin of the nonlinear compensation than conventional PID control.
Pan, Y.D., Ozguner, U. and Dagci, O.H. (2008) Variable-Structure Control of Electronic Trottle Valve. IEEE Transactions on Industrial Electronics, 55, 3899-3907.
Zhang, Y. and Kurihara, N. (2011) An Integral Variable Structure Compensation Method for Electronic Throttle Control with Input Constraint. Proceedings of 2011 3rd International Conference on advanced Computer Control (ICACC), 18-20 January 2011, 492-496. https://doi.org/10.1109/ICACC.2011.6016461
Zhang, Y. and Kurihara, N. (2012) A Study of Integral Sliding Mode Control with Input Constraint for Engine Idling-Speed Control. IEEJ Transactions on Electrical and Electronic Engineering, 7, 214-219.
Brian, A.-H., Dupont, P. and De Wit, C.C. (1994) A Survey of Models, Analysis Tools and Compensation Methods for the Control of Machines with Friction. Automatica, 30, 1083-1138. https://doi.org/10.1016/0005-1098(94)90209-7
Iwasaki, M., Kitoh, Y. and Matsui, N. (1996) Analysis and Performance Improvement of Motor Speed Control System with Nonlinear Friction. IEEJ Transactions on Electronics, Information and Systems, 116, 96-102.