This paper presents high performance control of electrohydraulic actuators for generating near periodic time varying trajectories. Such type of trajectories can be found in many industrial applications, particularly those involving master-slave type electronic cam-follower motion generation. The control algorithm includes a robust feedback control for disturbance rejection, a repetitive control...

The composition and principle of an electrohydraulic servo oil film stiffness control system of hydrostatic center frame will be introduced, and the system model identification as well as the verification will be carried out based on semi-physical simulation environment of Real-time Workshop (RTW) and system identification toolbox in MATLAB. A control strategy of fuzzy sliding model variable st...

This paper presents the theoretical and experimental researches performed by the authors in order to design a digital control system for electrohydraulic servomotors. The system contains a digital control module and two position servomechanisms. A mathematical approach was developed for obtaining a mathematical model describing the whole control system. The dynamic performance of this system wa...

Electrohydraulic servosystem have been used in industry in a wide number of applications. Its dynamics are highly nonlinear and also have large extent of model uncertainties and external disturbances. In order to increase the reliability, controllability and utilizing the superior speed of response achievable from electrohydraulic systems, further research is required to develop a control softw...

The electrohydraulic equipment of the coal gangue belt conveyor has been widely studied in recent years, but studies have limited to traditional hydraulic system with proportional valve and servo as control elements. Because their own structural characteristics, valves inherent defects such low reliability, high cost a long debugging cycle. It is necessary carry out technological innovation upg...

In this paper, a model-based impedance controller for electrohydraulic servosystems is developed. Rigid body and electrohydraulic models, including servovalve models are employed and described by a set of integrated system equations. Friction and leakage of hydraulic elements are also included. The control law consists of two signals, a feedback and a feedforward signal. An impedance filter mod...