Exist many studies documenting the use of intermittent pneumatic compression in lymphedema, venous ulcers, prophylaxis in deep vein thrombosis and limb ischaemia. This article discusses the basics and usefulness of this therapy based on available studies and recommendations. Because of lack serious side effects, good patient compliance and effectiveness intermittent pneumatic compression should...

For the research of simulation of synchronization control for pneumatic elevator, a model is builtin AMESim software. The simulations are used to research the impact of synchronous control strategy. The simulation results show that there are good synchronizing effects by applying pneumatic proportional technology and synchronization control with master-slave mode based on PID control. Some theo...

A pneumatic walking training aid for amputees is described. It was developed by the late Biomechanical Research and Development Unit, Roehampton, from an original design by Professor Little in Australia. The walking aid has been used successfully on the majority of below-knee and through-knee patients rehabilitated in the Roehampton Walking Training School since 1976. There have been no complic...

In this paper we demonstrate the applicability of a high speed pneumatic servovalve for active noise control (ANC). Pressurized air is fluctuated using the servovalve to produce sound at commandable amplitude and frequency. The paper presents results of a noise cancellation experiment with an acoustic duct structure where disturbance produced by a speaker is overwhelmed by the high speed pneuma...

Between June 1987 and December 2002, 237 cases of malleolar fractures were treated at Erasme Hospital using pneumatic stapling, alone or combined with another type of fixation. This retrospective study addresses 176 well-documented cases. The mean follow-up period was 36 months. The results indicate that pneumatic stapling is an effective technique with a very low rate of failure. Comminuted fr...

There are three types of compact spinning system on the market now: pneumatic system, mechanical system and mechanicalpneumatic system. The pneumatic system is the dominant one, which adopts perforated drum, perforated apron or lattice apron as condensing elements.5,6 The roving strand emerging from the front roller nip is condensed by negative pressure airflow produced by the aforementioned el...

The design of a pneumatic pulse-width modulated pressure control via trajectory optimized fast-switching electromagnetic valves is presented. Two fast-switching valves are used in a half bridge configuration for pressure control in a pneumatic volume. The valves are operated using a feedforward control, which guarantees soft landing and time optimality. The control performance and achievable no...

The effect of the pneumatic tourniquet on the incidence of postoperative deep venous thrombosis is uncertain. We carried out a controlled study comparing the incidence of deep venous thrombosis when a tourniquet was used with the incidence when a tourniquet was not used. Thrombosis was detected by radioisotope venography. The results of the study showed no difference in incidence and we conclud...

This study described a two axes pneumatic driven manipulator, which is driven by the servo cylinder. Through visual image technology, the position between the tip of the probe and the target was determined. Therefore, the visual servo can be produced the control command. A fuzzy controller with a dead zone compensator was designed to improve the position precision of a nonlinear pneumatic drive...

Pneumatic circular manipulator is a new experimental facility developed for testing different control methods and energy efficiency of automated systems with compressed air as a working medium. Also, the manipulator has the ability of remote control, via the Internet and thereby it is an important didactic tool for teaching in the field of pneumatic control with multiple actuators. In this pape...