Experimental and theoretical study of dynamic performance of an electrohy draulic sea waves generator

This work includes an analvsis of the electrohvdraulic control system for wave• J Jgenerating machine which consists of hydraulic power pack and serve actuator.The study includes an extensive theoretical and experimental investigation ’ofthe electrohydraulic serve valve (EHSV) and the electrohydraulic servo actuator(EHSA), A detailed nonlinear mathematical model describing the dynamic behavior ofEHSV and EHSA is developed, The developed mathematical model is used for thecomputer simulation of the EHSV and EHSA using the TUTSIM-7 simulation program,The transient response of the EHSV is evaluated theoretically and comparedwith experimental results given by the manufacturer. A good agreement was foundbetween the simulation’ and experimental results, which validates the simulationprogram of the servo valve.The response of the EHSA is evaluated experimentally and predictedtheoretically by using the simulation program, A good agreement was found betweenthe simulation and experimental results, which validates the simulation program,The dynamic behaviour of the electrohydraulic serve actuator is investigatedtheoretically by using the simulation program, The effect of constructional andoperational parameters on the EHSA behaviour is investigated,