The hydraulic actuators are widely used in industry for the fabrication of all sorts of products. Due to the complexity and strong nonlinearity, such as the time-varying and nonlinear deformation force and driving force as well as the nonlinear friction, it is often difficult to gain an accurate control. In this paper, we propose a hybrid off-line/online modeling-based tracking control method to alleviate this difficulty. First, a hybrid off-line/online modeling is proposed in order to achieve the models of both the time-varying and nonlinear deformation forces and nonlinear friction, upon whi...
