MEGDADY, MAHER FLEAHAN SALEH2018-04-252018-04-252017-102014115173http://bspace.buid.ac.ae/handle/1234/1125An investigation into multivariable control of propeller shaft system of marine vessels is introduced in this study. Two motors drive the shaft with two input voltages to produce torques which overcome the inertia of the load as well as the inertia of internal components of propeller shaft system in order to generate a rotational movement with two different angular speeds. In order to find the best response, best performance and the lowest power consumption by the controller of propeller shaft system, two approaches of control theory is presented; H-infinity control as well as Looping shaping. This paper shows how to reduce energy consumption, hence reduce tear of system’s internal component, the noise generated by system and maintenance cost. This research provides a comparison between the two control strategies in order to determine the pros and cons of each method and find the suitable controller based on application may be targeted later.enangular velocity controlpropeller shaft systemmarine vesselsmultivariable controlDissertation