ABSTRACT
The modulation of the rocket thrust is required for many practical applications regarding
certain missions to be performed by the missile. An existing thrust controller with two
modes of operation has been studied and analyzed. To upgrade the controller to
acquire a continuous gradual thrust modulation, an Electro-Hydraulic Servo-Pressure
Controller (EHSPC) has been integrated with the system after making necessary
adaptation of the current design. The valve parameters: controlled pressure, input
pressure, pilot pressure variations, and input controlling current have been investigated
and compared for the two systems using MATLAB SIMULINK program. It was possible
to acquire a new system capable of performing a continuous thrust modulation while
keeping the other characteristics of the system before modification.