Analysis and Design of a Servomotor Operating on High-Pressure Compressed Gas

The analysis, design, and development of a high-performance gas servomechanism suitable for aircraft and missile applications are described. The flow-control valve consists of two upstream orifices of fixed areas and two differentially variable downstream orifices. The areas of the variable orifices are controlled by a simple electromagnetic actuator. The fluid motor consists of two single-acting self-lubricating pistons which actuate the rocker-arm load assembly through push rods. Design parameters were obtained from the results of an analog-computer design study. The predicted transient response agrees very well with the experimentally derived rise time of 4 millisec.