Electrohydraulic servosystems exhibit highly nonlinear behavior to the effect that classical linear controllers, e.g., PD, usually achieve a limited performance. Load static and dynamic parameters variations are also contributing to the limitation of their position and force tracking performance. This paper presents a modelbased controller applied to a fully detailed model of an electrohydrauli...

OBJECTIVE To determine the efficacy of peroral electrohydraulic lithotripsy performed with an extra large duodenoscope (outside diameter 14.8 mm) and a choledochoscope with a diameter of 4.1 mm (Olympus "mother and baby" endoscope system) in the removal of very large stones from the common bile duct. DESIGN Prospective study of patients with giant stones in the common bile duct that were resi...

Wear and tear are usually caused by various factors, which reduce the life span of a mechanical part. In control engineering an Electrohydraulic actuator system, wear can be system or controller itself. This article examines chattering effect that occurs during sliding mode (SMC) design, its on nonlinear electrohydraulic (EHA) system. To examine phenomenon, signum function is first applied swit...

Electrohydraulic servo system has 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 in-crease the reliability, controllability and utilizing the superior speed of response achievable from electrohydraulic systems, further research is required to develop a control soft...

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...

Electrohydraulic servo system has 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 in-crease the reliability, controllability and utilizing the superior speed of response achievable from electrohydraulic systems, further research is required to develop a control soft...

Wehere report on a novel approach to deliver a fully covered self-expanding metal stent (SEMS) into the bile duct during double-balloon enteroscopy (DBE)-assisted endoscopic retrograde cholangiopancreatography (ERCP) using the overtube as an “accessory” or working channel. An 87-year-old woman with a history of a Billroth II reconstruction many years previously and complex choledocholithiasis h...

Electrohydraulic expansion joining has great potential for the light weight and high strength thin-walled pipes due to its strain rate. Based on central composite design (CCD) of response surface methodology, multiple experiments electrohydraulic process were performed. The multivariate quadratic nonlinear regression model between parameters (discharge voltage, wire length, diameter) ultimate p...

Biodegradable materials decompose and return to nature. This functionality can be applied derive robotic systems that are environmentally friendly. study presents a fully biodegradable soft actuator, which is one of the key elements in “green” robotics. The working actuator based on an electrohydraulic principle, similar hydraulically amplified self-healing electrostatic actuators. developed th...

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...