Ahmed Hamdy Abdelmaguid Sakr <br/><br/>
System frequency tuning for heaving buoy wave energy converters /  
 ضبط التردد لعوامة أنظمة محولات الطاقة الموجية 
Ahmed Hamdy Abdelmaguid Sakr ; Supervised Sayed M. Metwalli , Yasser H. Anis 
 - Cairo :   Ahmed Hamdy Abdelmaguid Sakr ,   2017 
 - 124 P. :   charts , facsimiles ;   30cm  
<br/><br/>Thesis (M.Sc.) - Cairo University - Faculty of Engineering - Department of Mechanical Designand Production  
<br/><br/> In this thesis, we present a quick long-term reactive loading control for heaving buoy wave energy converter. The control is achieved by introducing an external continuous variable sti ness that is connected to the buoy to tune its natural frequency. The external sti ness is connected to the buoy through a continuous Vbelt drive to change its e ect on the buoy. This control maximizes the oscillation amplitudes; hence, maximizing the power absorption e ciency by achieving near-resonance operation. Analytical results show a promising power absorption increase as compared to other control techniques. Experimental results, for an equivalent vibrating system, prove the concept of the control operation 
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<br/><br/><label>Subjects--Index Terms: </label>Buoy  Heaving Wave energy