This paper presents an approach for dead zone compensation in pneumatic position servo systems. The dead zone is an inherent nonlinearity in pneumatic servovalves, where for a range of input control values, the valve gives no output flow. Although pneumatic actuators are very common in industry, they have limitations in servo pneumatic applications that are caused by typical non-linearities of ...

Abstract A PLC controlled semi-automatic rotary indexing system for assembly of foot valve is modelled and simulated using CATIA Automation Studio. It comprised part feeders (Conveyors vibratory bowl feeder), face plate, fixtures, components (Body, cap, seal carrier, cover) electro-pneumatic (Electro-pneumatic pick & place press) which are CATIA. The kinematic model mechanism successfully v...

This paperproposes an energy saving approach io the control ofpneumaiic servo systems. The control meihodology is presenied, followed by experimental results ihai indicate significani energetic savings and esseniially no compromise in tracking performance relative to a purely active approach. Speci$cally, experiments indicaie an energv savings of 10 to 46% (depending on the desired tracking fre...

Pneumatic-actuated valves are critical components in many applications, including cryogenic propellant loading for space operations. For these components, failures need to be predicted so that components can be repaired to ensure mission success, i.e., health monitoring and fault prognostics is required. In order to develop, test, mature, and deploy valve prognostics algorithms, we have develop...

paper deals with accurate positioning of pneumatic actuator using solenoid controller to development a fast, accurate, and inexpensive position-controlled that may be applied to a variety of practical positioning applications are described. A Pulse Width Modulation PWM valve pulsing algorithm to allow the on/off solenoid valves to use in the place of costly servo valve. The open-loop characteri...

This project aims to develop a novel large stroke asymmetric pneumatic servo system of a hardware-in-the-loop for path tracking control under variable loads based on the MATLAB Simulink real-time system. High pressure compressed air provided by the air compressor is utilized for the pneumatic proportional servo valve to drive the large stroke asymmetric rod-less pneumatic actuator. Due to the p...

Valve positioner is the core component of pneumatic control valve. A new software and hardware design scheme intelligent valve presented in this paper. The circuit composition each part introduced part. Based on it, a solution to realize HART ‘multi-point’ communication proposed research. In design, novel combined PID algorithm solve nonlinear problem caused by friction between stem packing dur...