الفهرس 
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Abstract
This work includes an analvsis of the electrohvdraulic control system for wave
• J J
generating machine which consists of hydraulic power pack and serve actuator.
The study includes an extensive theoretical and experimental investigation ’of
the electrohydraulic serve valve (EHSV) and the electrohydraulic servo actuator
(EHSA), A detailed nonlinear mathematical model describing the dynamic behavior of
EHSV and EHSA is developed, The developed mathematical model is used for the
computer simulation of the EHSV and EHSA using the TUTSIM-7 simulation program,
The transient response of the EHSV is evaluated theoretically and compared
with experimental results given by the manufacturer. A good agreement was found
between the simulation’ and experimental results, which validates the simulation
program of the servo valve.
The response of the EHSA is evaluated experimentally and predicted
theoretically by using the simulation program, A good agreement was found between
the simulation and experimental results, which validates the simulation program,
The dynamic behaviour of the electrohydraulic serve actuator is investigated
theoretically by using the simulation program, The effect of constructional and
operational parameters on the EHSA behaviour is investigated,