An engine support mount including an airframe structure having a first anchor surface and a length extending along an x-axis, with a second axis defined perpendicularly to the x-axis. A support member is fixed to the airframe structure and defines a first aperture and a second aperture. A mounting assembly includes an elongated arm and first and second primary attachment assemblies respectively attaching the arm to the support member at the first and second apertures, the arm having a second anchor surface. A moment arm reduction feature includes a lug fixed to one of the anchor surfaces and a corresponding fastener fixed to the other of the anchor surfaces. The first anchor surface is positioned on the airframe structure outside of the first and second apertures, and the second anchor surface is positioned on the arm outside of the first and second attachment assemblies.

Irregular motion of waves creates a challenge to obtain energy efficiently. Heave type devices have been found to have high efficiencies, but they are limited to capturing energy along one or two directions of freedom. A new system and method for obtaining energy from the heaving motion of the waves is presented. It consists of base and heave structures connected through arm devices comprising three degrees of freedom, said arms powered by the motion of the heave structure in the fluid. These arm devices allow capture of wave energy by mechanical, hydraulic, or pneumatic systems.

An engine support mount including an airframe structure having a first anchor surface and a length extending along an x-axis, with a second axis defined perpendicularly to the x-axis. A support member is fixed to the airframe structure and defines a first aperture and a second aperture. A mounting assembly includes an elongated arm and first and second primary attachment assemblies respectively attaching the arm to the support member at the first and second apertures, the arm having a second anchor surface. A moment arm reduction feature includes a lug fixed to one of the anchor surfaces and a corresponding fastener fixed to the other of the anchor surfaces. The first anchor surface is positioned on the airframe structure outside of the first and second apertures, and the second anchor surface is positioned on the arm outside of the first and second attachment assemblies.

Irregular motion of waves creates a challenge to obtain energy efficiently. Heave type devices have been found to have high efficiencies, but they are limited to capturing energy along one or two directions of freedom. A new system and method for obtaining energy from the heaving motion of the waves is presented. It consists of base and heave structures connected through arm devices comprising three degrees of freedom, said arms powered by the motion of the heave structure in the fluid. These arm devices allow capture of wave energy by mechanical, hydraulic, or pneumatic systems.

A system allowing for the tilting of the rocket motor such that, in the tilted position, the centre of the nozzle is located at least approximately on the neutral orientation axis of said rocket motor.

A system is provided for converting fluid motion into electrical power, with the system being deployable in a body of fluid. The system includes a support structure and a movable structure connected to the support structure. The support structure includes a generator assembly configured to convert mechanical energy to electrical energy and provide electric power from the electrical energy. The movable structure has three or more degrees of freedom, and is configured to generate mechanical energy for conversion by the generator assembly during a power generation phase of a power cycle in which the fluid motion acts on the movable structure. The movable structure has a first configuration during the power generation phase and a second, different configuration during a recovery phase of the power cycle, with the movable structure in the first configuration having a greater surface area normal to the flow of fluid.

A system is provided for converting fluid motion into electrical power, with the system being deployable in a body of fluid. The system includes a support structure and a movable structure connected to the support structure. The support structure includes a generator assembly configured to convert mechanical energy to electrical energy and provide electric power from the electrical energy. The movable structure has three or more degrees of freedom, and is configured to generate mechanical energy for conversion by the generator assembly during a power generation phase of a power cycle in which the fluid motion acts on the movable structure. The movable structure has a first configuration during the power generation phase and a second, different configuration during a recovery phase of the power cycle, with the movable structure in the first configuration having a greater surface area normal to the flow of fluid.

A system is provided for converting fluid motion into electrical power, with the system being deployable in a body of fluid. The system includes a support structure and a movable structure connected to the support structure. The support structure includes a generator assembly configured to convert mechanical energy to electrical energy and provide electric power from the electrical energy. The movable structure has three or more degrees of freedom, and is configured to generate mechanical energy for conversion by the generator assembly during a power generation phase of a power cycle in which the fluid motion acts on the movable structure. The movable structure has a first configuration during the power generation phase and a second, different configuration during a recovery phase of the power cycle, with the movable structure in the first configuration having a greater surface area normal to the flow of fluid.

Multi-resonant control of a 3 degree-of-freedom (heave-pitch-surge) wave energy converter enables energy capture that can be in the order of three times the energy capture of a heave-only wave energy converter. The invention uses a time domain feedback control strategy that is optimal based on the criteria of complex conjugate control. The multi-resonant control can also be used to shift the harvested energy from one of the coupled modes to another, enabling the elimination of one of the actuators otherwise required in a 3 degree-of-freedom wave energy converter. This feedback control strategy does not require wave prediction; it only requires the measurement of the buoy position and velocity.

The invention provides optimal control of a three-degree-of-freedom wave energy converter using a pseudo-spectral control method. The three modes are the heave, pitch and surge. A dynamic model is characterized by a coupling between the pitch and surge modes, while the heave is decoupled. The heave, however, excites the pitch motion through nonlinear parametric excitation in the pitch mode. The invention can use a Fourier series as basis functions to approximate the states and the control. For the parametric excited case, a sequential quadratic programming approach can be implemented to numerically solve for the optimal control. The numerical results show that the harvested energy from three modes is greater than three times the harvested energy from the heave mode alone. Moreover, the harvested energy using a control that accounts for the parametric excitation is significantly higher than the energy harvested when neglecting this nonlinear parametric excitation term.