Frequency Response Of Critical Components Of A Hydraulic Servovalve

The analyzed electrohydraulic servo valve is jet pipe type, is one of the mechatronics component used for precision flow control application. The jet pipe servo valves have one movable nozzle and two collector ports, from where fluid is ducted to the main valve spool. The servovalve analyzed here is basically used in fuel control application in Variable Geometry Actuation System (VGAS) of a gas turbine engine. It consists of several precision and delicate components. For the analysis the feedback spring assembly and jet pipe assembly of jet pipe servovalve are identified and conducted direct-solution steady-state dynamic analysis to study the response of the system for harmonic excitation. The assembly was subjected for analysis to ascertain the response for critical parameters like thickness of flexure tube and material for flexure tube.