A fuel supply system for an aircraft includes a fuel tank configured to supply fuel to an engine of an aircraft, a boost pump in operational communication with the fuel tank, wherein the boost pump is configured to control at least one of a fuel level and a fuel pressure in the fuel tank, and an electronic controller in communication with the boost pump and configured to control the boost pump. The electronic controller is configured to receive received information including (i) fuel information, (ii) flight information, and (iii) aircraft information, and configured to control the boost pump based on the received information.

A method for the weight-dependent control of the internal pressure of a supporting body loaded by a weight load or payload, wherein the internal pressure is produced by means of an electric-motor-driven compressor, and the weight load or payload which is present and which acts on a supporting body in the form of a mass m.sub.Load under the effect of acceleration due to gravity g is determined in that a reduction and a subsequent increase in the internal pressure take place, wherein the increase in the internal pressure causes the position of an application point of the weight load or payload to change by a position difference Z, wherein:

during the increasing of the internal pressure by means of the compressor, the motor current I.sub.Load of the drive motor of the compressor is measured with a constant motor voltage U and integrated over the time of the increase in pressure, and the electrical work W.sub.Load which is necessary for the change in position is determined therefrom,

wherein the electrical work W.sub.Load the electrical work W.sub.Load is compared with a characteristic value of the electrical work W.sub.0 from a characteristic diagram, wherein the change in position Z, the difference in mass m and the difference in payload F.sub.Z are determined from the difference W between W.sub.Load and W.sub.0 and the mass m.sub.Load and the weight load or payload which is actually present as a result is determined therefrom.

A variable displacement pump for supplying fluid to a system is described. Controlling the variable displacement pump is determined based upon inputs from a fluidic pressure sensor and an accelerometer, and includes determining a desired fluidic pressure and monitoring, via the fluidic pressure sensor, an actual fluidic pressure. A pressure error term is determined based upon a difference between the actual fluidic pressure and the desired fluidic pressure. A time-integrated pressure error term is determined based upon the pressure error term, and a g-force is determined based upon an input signal from the accelerometer. The variable displacement pump is controlled in response to the time-integrated pressure error term when the g-force is greater than a threshold g-force.

A pressure sewer control system includes a server in communication with one or more pressure sewer installations across a communications network, each of the one or more pressure sewer installations including a controller and one or more sewerage tanks. The server is configured to: determine weather data for a region associated with the pressure sewer installation; estimate power generating capability of a weather-dependent power generator based on the weather data; receive fluid level data indicative of a fluid level in the one or more sewerage tanks from the controller; determine whether a pump action should be instigated by the controller to pump fluid from the sewage tank based on the estimated power generating capability of the weather-dependent power generator and the fluid level data; and transmit a pump control instruction to the controller.

A synthetic jet actuator includes a cavity layer having an internal cavity for reception of a fluid volume and an orifice providing a fluid communication between the cavity and an external atmosphere; an oscillatory membrane having a piezoelectric material adapted to deflect the oscillatory membrane in response to an electrical signal; and a controller configured to control delivery of electrical signals to the piezoelectric material for controlling operation of the oscillatory membrane based on input data received from one or more sources that informs on a temperature and/or performance level of a targeted objected for cooling. The actuator may further include a thermal element for affecting modified temperature control; and the actuator may be integrated into a surface of a thermally diffusive structure for dissipating heat from a thermal load.

Provided is a voltage control device of a fuel-cell vehicle capable of securing good acceleration responsiveness while suppressing battery deterioration even when a vehicle acceleration request is made in the situation where the output from a battery is restricted. When determining that electric power suppliable from a secondary battery to an air compressor is less than a lower limit of an acceleration maintaining-electric power of the air compressor, a voltage control device of a fuel-cell vehicle maintains a state where electric power generated by a fuel cell is consumed by an electric power drive, and supplies the electric power consumed by the electric power drive to the air compressor when a vehicle acceleration request is made.

Design solutions to mitigate the following four fatal flaws in the conventional pump system design; namely, (1) surprise pump-failure in single pump designs that can result in costly water damage; (2) the threat of fatal high voltage electrocution due to flooding; (3) grid power outage and no energy supply to support the needed pumping power that results in water damage; (4) foil odor from the standing water in the well after a period of low seeping rate with or without activated pumping. The principles described herein can completely mitigate the above four fatal design issues.

Design solutions to mitigate the following four fatal flaws in the conventional pump system design; namely, (1) surprise pump-failure in single pump designs that can result in costly water damage; (2) the threat of fatal high voltage electrocution due to flooding; (3) grid power outage and no energy supply to support the needed pumping power that results in water damage; (4) foil odor from the standing water in the well after a period of low seeping rate with or without activated pumping. The principles described herein can completely mitigate the above four fatal design issues.

A pressure sewer control system includes a server in communication with one or more pressure sewer installations across a communications network, each of the one or more pressure sewer installations including a controller and one or more sewerage tanks. The server is configured to: determine weather data for a region associated with the pressure sewer installation; estimate power generating capability of a weather-dependent power generator based on the weather data; receive fluid level data indicative of a fluid level in the one or more sewerage tanks from the controller; determine whether a pump action should be instigated by the controller to pump fluid from the sewage tank based on the estimated power generating capability of the weather-dependent power generator and the fluid level data; and transmit a pump control instruction to the controller.

Provided is a voltage control device of a fuel-cell vehicle capable of securing good acceleration responsiveness while suppressing battery deterioration even when a vehicle acceleration request is made in the situation where the output from a battery is restricted. When determining that electric power suppliable from a secondary battery to an air compressor is less than a lower limit of an acceleration maintaining-electric power of the air compressor, a voltage control device of a fuel-cell vehicle maintains a state where electric power generated by a fuel cell is consumed by an electric power drive, and supplies the electric power consumed by the electric power drive to the air compressor when a vehicle acceleration request is made.