Abstract: A method for controlling a hybrid turbomachine includes determining a sequence of deviations, each being a difference between a measurement of a sequence of measurements of a speed of a low-pressure shaft of the hybrid turbomachine and a setpoint of a sequence of setpoints of the speed of the low-pressure shaft, determining a variation of fuel flow rate and determining a variation of electrical torque, the electrical torque being configured to be applied to the low-pressure shaft, and controlling the hybrid turbomachine in order to vary a fuel flow rate according to the determined variation of fuel flow rate and in order to vary an electrical torque according to the determined variation of electrical torque.

Abstract: A method for controlling a hybrid turbine engine includes determining a sequence of deviations, each being a difference between one measurement of a sequence of measurements of a speed of a drive shaft of the engine and one setpoint of a sequence of engine speed setpoints, determining a variation of a fuel flow rate and determining a variation of an electrical torque, the determining the variation of fuel flow rate and the determining the variation of electrical torque both use a difference between a last measurement and a penultimate measurement of the sequence of measurements, a last deviation of the sequence of deviations that is temporally associated with the last measurement, and a sum of the deviations of the sequence of deviations, and controlling the hybrid turbine engine in order to vary the fuel flow rate and the electrical torque according to the determined variations.

Abstract: A passive heave compensator comprising: a main hydraulic cylinder, including a moveable piston having a piston rod extendible through the main hydraulic cylinder and a piston head, a gas phase above the piston head, and at least one oil phase below the piston head separated by a boundary; an upper connection point associated with the main hydraulic cylinder and a lower connection point associated with the piston rod; and at least one accumulator, the or each accumulator having a moveable separator to divide the accumulator between a gas phase above the separator, and an oil phase below the separator, and the or each oil phase being in communication with an oil phase in the main hydraulic cylinder; characterized in that the main hydraulic cylinder further comprises a cylinder sleeve co-axial with the piston head to provide, in co-ordination with the piston head, the boundary between the gas phase and the at least one oil phase in the main hydraulic cylinder.

Abstract: A passive heave compensator having: a main hydraulic cylinder, including a moveable piston having a piston rod extendible through the main hydraulic cylinder and a piston head to divide the main hydraulic cylinder between a gas phase above the piston head, and oil phase below the piston head; an upper connection point associated with the main hydraulic cylinder and a lower connection point associated with the piston rod; and an accumulator having a moveable separator to divide the accumulator between a gas phase above the separator, and an oil phase below the separator and being in communication with the oil phase in the main hydraulic cylinder; wherein an oil phase includes a magnetorheological substance, and that the passive heave compensator includes one or more electromagnetic controllers.

Abstract: A passive heave compensator comprising: a main hydraulic cylinder, including a moveable piston having a piston rod extendible through the main hydraulic cylinder and a piston head, a gas phase above the piston head, and at least one oil phase below the piston head separated by a boundary; an upper connection point associated with the main hydraulic cylinder and a lower connection point associated with the piston rod; and at least one accumulator, the or each accumulator having a moveable separator to divide the accumulator between a gas phase above the separator, and an oil phase below the separator, and the or each oil phase being in communication with an oil phase in the main hydraulic cylinder; characterized in that the main hydraulic cylinder further comprises a cylinder sleeve co-axial with the piston head to provide, in co-ordination with the piston head, the boundary between the gas phase and the at least one oil phase in the main hydraulic cylinder.

Abstract: A passive heave compensator having: a main hydraulic cylinder, including a moveable piston having a piston rod extendible through the main hydraulic cylinder and a piston head to divide the main hydraulic cylinder between a gas phase above the piston head, and oil phase below the piston head; an upper connection point associated with the main hydraulic cylinder and a lower connection point associated with the piston rod; and an accumulator having a moveable separator to divide the accumulator between a gas phase above the separator, and an oil phase below the separator and being in communication with the oil phase in the main hydraulic cylinder; wherein an oil phase includes a magnetorheological substance, and that the passive heave compensator includes one or more electromagnetic controllers.