شبيه سازي و تحليل الكترومغناطيسي و آماري سولنوييد شيرهاي كنترل جهت تناسبي

چكيده انگليسي :

Simulation Electromagnetic Analysis and Statistical Evaluation of Proportional Directional Control Valve Solenoid Fakhredin Bayat f bayat@me iut ac ir Date of Submission 2011 04 10 Department of Mechanical Engineering Isfahan University of Technology Isfahan 84156 83111 Iran Degree M Sc Language FarsiSupervisor Alireza Fadaie Tehrani mcjaft@cc iut ac irAbstractDespite increasing use of proportional hydraulic valves PHVs in different industries such as transportationsystems mining aviation etc the use of numerical methods give more sights into the respective roles ofthe various portions of the plunger and stationary core geometry and provide a better understanding of theworking principle of these hydraulic valves Investigation on effecting parameters on their performancecharacteristics such as dimensional parameters voltage wire etc and predicting these parameters andimproving them have considerable importance In this study effecting parameters such as different softmagnetic materials low carbon steel stainless steel mumetal etc dimensional parameters of stationarycore and plunger dimension of the solenoid coil width and length and diameter of used wire appliedcurrent and voltage have been investigated The force calculation algorithm is also used to determine theforce distribution pattern around the plunger surface and to provide a detailed analysis of the solenoidstructure In the first section of this thesis different soft magnetic materials to achieve the magnetic force displacement characteristic curve have been investigated using electromagnetic analysis by ANSYSsoftware package and the results have been compared to each other ANSYS was employed for the analysisand design optimization incorporating the non linear characteristics of the magnetic material Differentoptions available in ANSYS for calculating the force were compared ANSYS offers two search methods tofind the magnetic force Maxwell stress tensor MTS and virtual work methods VWM MTS has beenemployed in this thesis Then dimensional parameters of stationary core and plunger including the slopesof stationary core and plunger the length of plunger the width of stationary core etc air gap and differentcurrents investigated and related curves have been extracted Also the coupled field analysis to investigateof the effects of magnetic and electrical fields on thermal and structural stresses and deformations has beenexplained The simulation results have been compared with experimental results and the satisfactory resultsobtained The distribution of mechanical stress on plunger surface by applying magnetic force for specifiedcurrent density has been plotted In the second section magnetic force based on the performace parameters width and length of coil wire diameter and voltage using design of experiments regression analysis andanalysis of variance ANOVA have been investigated by Minitab software package The equations topredict the magnetic force for other performance parameters such as wire diameter voltage and coildimensions in three different soft magnetic materials were also obtained Also a Simulink model usingMatlab software package to simulate the dynamic and steady state response of PHV in terms of voltage asinput parameter and displacement and velocity of spool as output parameters has been obtained This modelconsists of the solenoid model and the spool model separately It predicts the static and dynamic behaviorsof PHV satisfactory Keywords Proportional hydraulic valve Magnetic analysis Design of experiments Control model of PHV

بيات، فخرالدين

شبيه سازي و تحليل الكترومغناطيسي و آماري سولنوييد شيرهاي كنترل جهت تناسبي

شيرهاي هيدروليكي تناسبي , آناليز مغناطيسي , طراحي آزمايش , مدل كنترلي شيرهاي هيدروليكي تناسبي