A 31-year-old male with true hermaphroditism and a 46, XX karyotype who underwent gonadectomy and extirpation of the internal sex organs at the age of 4 had a large stone 4 cm in diameter in the residual male vagina. He complained of pain on micturition, hematuria, and rectal pressure. Urethroscopy and retrograde urethrography disclosed an ostium of the male vagina in the prostatic urethra, and...

Model based feedback control strategies for electrohydraulic braking and active steering systems in passenger cars are considered. Simulation results with a complex vehicle model and measurements from test drives with a real car are shown for brake control. For a μ-split road surface additional drive dynamics control is required like ESP or active front steering (AFS). Therefore, an AFS feedbac...

This paper focuses on modeling and parameter estimation for the electrohydraulic actuation system of an articulated forestry machine. The linear graph method is implemented in deriving mathematical models of the swing, boom and stick subsystems. Actuation dynamics are subsequently integrated with manipulator dynamics to result in a complete machine model. Identification procedures employed in e...

Fales, Roger, "Robust control design for an electrohydraulic wheel loader system with a human-in-the-loop assessment in a virtual environment " (2004). Retrospective Theses and Dissertations. Paper 937. The quality of this reproduction is dependent upon the quality of the copy submitted. Broken or indistinct print, colored or poor quality illustrations and photographs, print bleed-through, subs...

This paper describes the modeling, simulation, and control of an inverted, ceiling-mounted Stewart platform, designed to be a one-person motion simulator. The dynamic equations of the Stewart platform are derived using the virtual work principle. It is shown by simulations that the leg dynamics can be neglected. A model of the electrohydraulic actuator is derived and then veri ed using experime...

OBJECTIVE To assess the effect of dual-head lithotripsy on renal function and morphology in a pig model of shockwave (SW) injury, as lithotripters with two shock heads are now available for treating patients, but little information is available with which to judge the safety of treatment with dual pulses. MATERIALS AND METHODS A dual-head electrohydraulic lithotripter (Duet, Direx Corp., Nati...

The control synchronization of multiple electrohydraulic actuators (MEHAs) is initially discussed to ensure the consensus every actuator (EHA) with three-order isomorphic dynamics. First, EHA model linearized using Lie derivative method obtain state-space MEHAs. Then, disturbance observer used estimate and compensate for unknown external load caused by driving force a motion plant. Via Lyapunov...