Technical Paper
Model-Based Friction and Limp Home Compensation In Electronic Throttle Control
2006-04-03
2006-01-0857
In this paper, we present an estimation of the coulomb friction and return spring effects in an automotive electronic throttle control (ETC) system using a nonlinear model-based estimator. The non-linear model-based estimator smoothly estimates this static non-linear behavior based on a priori knowledge of the feedback signals of the position error and the angular velocity of the throttle plate. Extensive simulations showed that the estimator sufficiently predicts the actual static non-linear behavior. The performance of the estimator was compared to an approximation based on the experimental nonlinear characteristics of the throttle. The non-linear model-based estimator can be used for compensation and can cancel the effect of the static nonlinearity in the throttle actuator to improve throttle position control.