Current economic and environmental constraints are pushing OEMs and system integrators to design high performance systems with tighter development time requirements. They naturally resort to simulations to avoid the time and cost of early prototyping. This establishes a new “language” of virtual machines and components that hydraulic, electrohydraulic and control component manufacturers also ne...

Aim of the present document is to present a strategy for the analysis and simulation of DDV electrohydraulic actuators, employed in fly-by-wire helicopters, using object-oriented techniques. A complete, detailed, DDV hydraulic servoactuator model assembled using the Modelica library for mechatronic electrohydraulic systems, presented in Deliverable 6.1, is described and a simple procedure for i...

The objective of this work is to present some results concerning the neuro-fuzzy control synthesis as applied to electrohydraulic servomechanisms actuating primary flight controls. This represents a remarkable control strategy, with antisaturating and antichattering properties, which is in fact independent of mathematical model of the system, thus achieving certain robustness and reducing compl...

The purpose of this work is to design a neurofuzzy controller, which can be used in a microcomputer to control the position of an electrohydraulic servo actuating primary flight controls. More specifically, an artificial intelligence based neuro-fuzzy controller is synthesized to solve a robust servomechanism problem. Indeed, the artificial intelligence based synthesis of control law provides a...

BACKGROUND Patients with end-stage liver disease have an increased risk of symptomatic gallstone disease, as well as complications associated with cholecystectomy. We hypothesized that peroral transpapillary cholecystoscopy with electrohydraulic lithotripsy of gallbladder stones is technically feasible and beneficial in patients who are high operative risks. DESIGN Observational, descriptive....

Introduction: Regular implementation of quality control (QC) program in diagnostic X-ray facilities may affect both image quality and patient radiation dose due to the changes in exposure parameters. Therefore, this study aimed to investigate the status of randomly selected conventional radiographic X-ray devices installed in radiology centers of Great Khorasan Province, Iran, to produce the da...