Abstract: A rotary apparatus comprises a shaft having a rotational axis, a rotation indicator formed on the shaft, a target feature proximate the rotation indicator, and a sensor proximate the target feature. The target feature extends circumferentially about the shaft, with a radial face transverse to the rotational axis and a circumferential face along the rotational axis. The sensor is oriented toward the rotation indicator to sense a rotational speed of the shaft, and oriented toward the target feature to sense transverse vibrations based on a radial distance to the target feature and longitudinal vibrations based on an axial distance to the target feature.

Abstract: A redundant, multi-source architecture provides output loads access to each of the plurality of power sources. The architecture includes at a least a first power bus and a second power bus. A plurality of loads are connected to the first power bus and the second power bus. Redundant first and second channel controllers are connected to receive power from the first power bus and the second power bus, respectively, wherein one of the first and second channel controllers is designated as the active channel controller. The active channel controller allocates power from both the first power bus and the second power bus to each of the plurality of loads.

Abstract: A redundant, multi-source architecture provides output loads access to each of the plurality of power sources. The architecture includes at a least a first power bus and a second power bus. A plurality of loads are connected to the first power bus and the second power bus. Redundant first and second channel controllers are connected to receive power from the first power bus and the second power bus, respectively, wherein one of the first and second channel controllers is designated as the active channel controller. The active channel controller allocates power from both the first power bus and the second power bus to each of the plurality of loads.

Abstract: A display system comprises first and second LED panels for displaying first and second priority aviation data, a power supply, a modulator, a processor and a logic gate. The modulator generates a modulated voltage for the second LED panel, where the second priority data are displayed at a modulated brightness. The processor controls the modulator, and generates a status signal indicating a failure condition of the modulated voltage. The logic gate switches the first LED panel from the modulated voltage to the unmodulated voltage based on the status signal, where the first priority data default from the modulated brightness level to full brightness based on the failure condition.

Abstract: A display system comprises first and second LED panels for displaying first and second priority aviation data, a power supply, a modulator, a processor and a logic gate. The modulator generates a modulated voltage for the second LED panel, where the second priority data are displayed at a modulated brightness. The processor controls the modulator, and generates a status signal indicating a failure condition of the modulated voltage. The logic gate switches the first LED panel from the modulated voltage to the unmodulated voltage based on the status signal, where the first priority data default from the modulated brightness level to full brightness based on the failure condition.

Abstract: A rotary apparatus comprises a shaft having a rotational axis, a rotation indicator formed on the shaft, a target feature proximate the rotation indicator, and a sensor proximate the target feature. The target feature extends circumferentially about the shaft, with a radial face transverse to the rotational axis and a circumferential face along the rotational axis. The sensor is oriented toward the rotation indicator to sense a rotational speed of the shaft, and oriented toward the target feature to sense transverse vibrations based on a radial distance to the target feature and longitudinal vibrations based on an axial distance to the target feature.

Abstract: A redundant, multi-source architecture provides output loads access to each of the plurality of power sources. The architecture includes at a least a first power bus and a second power bus. A plurality of loads are connected to the first power bus and the second power bus. Redundant first and second channel controllers are connected to receive power from the first power bus and the second power bus, respectively, wherein one of the first and second channel controllers is designated as the active channel controller. The active channel controller allocates power from both the first power bus and the second power bus to each of the plurality of loads.

Abstract: An exemplary embodiment of a regenerative electrochemical cell system, comprises: a fuel cell module, an electrolysis module, a heat exchange, and an inverted hydrogen storage device. The fuel cell module can comprise a fuel cell hydrogen inlet in fluid communication a hydrogen storage system, and a fuel cell oxygen inlet in fluid communication with a surrounding atmosphere and in fluid communication with a gaseous portion of an oxygen/water phase separation device. The electrolysis module can comprise an electrolysis water inlet in fluid communication with the water storage device via the fuel cell module, and an electrolysis water outlet in fluid communication with a second water storage device. The inverted hydrogen storage device can comprise a fluid inlet in fluid communication with an electrolysis hydrogen outlet, and a gas outlet in fluid communication with a fuel cell hydrogen inlet.

Abstract: A regenerative fuel cell power system has a plurality of fuel cell power modules, a plurality of electrolysis modules, a water management system and a master controller. The master controller manages the temperature within the electrolysis system to prevent freezing through circulation of water from the water management system.

Abstract: A fuel cell system includes a fuel cell apparatus and a heat storage device. The heat storage device is in fluid communication with and responsive to the fuel cell apparatus and is adapted to receive and store heat from and deliver heat to the fuel cell apparatus.

Abstract: A modular power system having separately removable electrolysis and power modules, each with separate sets of connection ports, is disclosed. The connection port set of the electrolysis module is adapted for operable communication with a water supply, a hydrogen storage device, and the power module, and the connection port set of the power module is adapted for operable communication with the water supply, the hydrogen storage device, and the electrolysis module.

Abstract: A power system, comprising: a primary power source in electrical communication with a bus and a bridging power source, wherein the bridging power source comprises at least one of a capacitor, a battery, and an electrolysis cell, and the bridging power source is in electrical communication with the bus; and a secondary power source in electrical communication with the bus. A method for operating a power system, comprising: monitoring a primary power source; if the primary power source exhibits selected characteristics, directing power from a bridging power source to a bus and initiating a secondary power source, and the bridging power source comprises at least one of a capacitor, a battery, and an electrolysis cell; and unless the secondary power source exhibits the selected characteristics, powering the bus with the secondary power source and ceasing the directing power from the bridging power source.

Abstract: A system for providing back-up power to a load powered by a primary power source comprises: a fuel cell arrangement for generating back-up power for the load, a bridging power source for generating bridge power for the load, and a controller in operable communication with the fuel cell arrangement and the bridging power source. The controller is adapted to initiate application of the bridge power to the load upon detecting a deterioration of power from the primary power source, and is further adapted to initiate application of the back-up power to the load upon detecting a power capability of the back-up power to power the load.

Abstract: A method of monitoring the operation of a gas sensor is disclosed. A system signal is provided in response to sensing first or second system conditions, and a gas concentration signal is provided in response to sensing first or second gas concentration levels of a gas. In response to the system and gas concentration signals, a signal indicating the operating condition of the gas sensor is provided.

Abstract: A method and apparatus for operating a power system is disclosed. A plurality of sensor signals each representative of an operating characteristic of a power system module are received at a common data bus. The sensor signals are received and analyzed at a controller for the presence of an abnormal operating condition, and in response thereto it is determined whether an operational adjustment of the power system module is desirable. In response to the existence of a desirable adjustment condition, the operation of the power system module is automatically adjusted. A sensor of the plurality of sensors is arranged for providing an operating characteristic that is derivable from one or more of the other sensors, which include a different type of sensor, thereby providing redundant system information for determining whether an operational adjustment of the power system module is desirable.

Abstract: A fuel cell power system has a plurality of fuel cell power modules, a plurality of local controllers, and a master controller. Each fuel cell power module includes a fuel cell for generating electrical power, and each local controller controls one respective fuel cell power module. The master controller controls the local controllers.

Abstract: A regenerative fuel cell system is provided having at least one hydrogen storage container fluidly coupled to at least one hydrogen generator and at least one power generator. Each power generator further includes a fuel cell fluidly coupled to the hydrogen storage container, an electric energy storage device, and an unregulated dc bus electrically connected to said fuel cell and said electric storage device. The system further provides for a health monitoring system for determining the occurrence of critical events which may necessitate the disabling of the system.

Abstract: A regenerative fuel cell system is provided having at least one hydrogen storage container fluidly coupled to at least one hydrogen generator and at least one power generator. Each power generator further includes a fuel cell fluidly coupled to the hydrogen storage container, an electric energy storage device, and an unregulated dc bus electrically connected to said fuel cell and said electric storage device. The system further provides for a health monitoring system for determining the occurrence of critical events which may necessitate the disabling of the system.

Abstract: An exemplary embodiment of a regenerative electrochemical cell system, comprises: a fuel cell module, an electrolysis module, a heat exchange, and an inverted hydrogen storage device. The fuel cell module can comprise a fuel cell hydrogen inlet in fluid communication a hydrogen storage system, and a fuel cell oxygen inlet in fluid communication with a surrounding atmosphere and in fluid communication with a gaseous portion of an oxygen/water phase separation device. The electrolysis module can comprise an electrolysis water inlet in fluid communication with the water storage device via the fuel cell module, and an electrolysis water outlet in fluid communication with a second water storage device. The inverted hydrogen storage device can comprise a fluid inlet in fluid communication with an electrolysis hydrogen outlet, and a gas outlet in fluid communication with a fuel cell hydrogen inlet.

Abstract: A gas regulation system includes a manifold, a plurality of control modules in fluid communication with the manifold, and a power source. Each control module includes an actuatable valve that is in fluid communication with an associated gas storage device and in electrical communication with the power source. The power source is adapted to prevent more than one of the actuatable valves from simultaneously having an actuated state.