Abstract: A propulsion system is described that includes an electrical bus, a generator configured to provide electrical power to the electrical bus, a plurality of propulsory configured to provide thrust by simultaneously being driven by the electrical power at the electrical bus, and a controller. The controller is configured to synchronize a rotational speed of an individual propulsor from the plurality of propulsory with a rotational speed of the generator after the individual propulsor has become unsynchronized with the rotational speed of the generator by controlling at least one of the rotational speed of the generator, nozzle area of the individual propulsor, or a pitch angle of the individual propulsor.

Abstract: The design of a novel digital controller for a motor driven aircraft arrestment system of the type used on aircraft carriers is described. The unique control and feedback design of the described controller has many advanced features, which provide many advantages over existing designs for controlling advanced arresting gear systems. Also described is a trajectory generator subsystem which provides the port and starboard side speed and position references used by both an engage phase controller and/or an arrest phase controller of the aircraft arrestment system.

Abstract: An apparatus is described that can monitor the sounds and voices of infants and children in a house by judicially placing nodes in key locations of the home. The network has intelligence and uses voice recognition to enable, disable, reroute, or alter the network. The network uses voice recognition to follow a child from node to node, monitors the children according to activity and uses memory to delay the voices so the adult can hear the individual conversations. An adult that has been assigned privilege can disable all nodes from any node in the network. Another apparatus can locate an individual by voice recognition or sounds they emit including walking, breathing and even a heartbeat. The sound is detected at several microphones that have a specific positional relationship to a room or an enclosement. Triangulations of the time differences of the audio signal detected by the microphones are used to determine the location or position of the audio source in the room.

Abstract: An apparatus is described that can monitor the sounds and voices of infants and children in a house by judicially placing nodes in key locations of the home. The network has intelligence and uses voice recognition to enable, disable, reroute, or alter the network. The network uses voice recognition to follow a child from node to node, monitors the children according to activity and uses memory to delay the voices so the adult can hear the individual conversations. An adult that has been assigned privilege can disable all nodes from any node in the network. Another apparatus can locate an individual by voice recognition or sounds they emit including walking, breathing and even a heartbeat. The sound is detected at several microphones that have a specific positional relationship to a room or an enclosement. Triangulations of the time differences of the audio signal detected by the microphones are used to determine the location or position of the audio source in the room.

Abstract: An integral solar module power conditioning system includes one or more solar module support frames. Each frame includes a plurality of plug-and-play electrical connectors integrated therewith. A microinverter or microinverter connector is also integrated with each frame. Each frame is configured to receive a respective solar electric module and to carry electrical power through a plurality of solar electric modules and corresponding microinverters connected together via a plurality of solar module support frames connected together via the plurality of integrated plug-and-play electrical connectors.

Abstract: A management apparatus is described of a rotating motor and a load during power loss; the apparatus comprises a first switching circuit coupled with the rotating motor and a controller of said first switching circuit. The controller is configured to drive the first switching circuit so as to convert a back-electromotive force voltage developed in the rotating motor into a power supply voltage for the load. The first switching circuit is driven in accordance with a first duty cycle. The apparatus comprises a second switching circuit coupled with the load and driven in accordance with a second duty cycle. The controller is configured to vary said first and said second duty cycles to keep the power supply voltage for the load above or equal to a threshold voltage.

Abstract: A phase locked loop (PLL) circuit includes a first signal detector having a first input terminal configured to receive a varying first input signal, a second input terminal configured to receive a feedback signal that corresponds to the center of the input frequency, and an output terminal configured to provide an output signal corresponding to a phase difference between the first input and feedback signals. A delay estimator has an input terminal configured to receive the output signal from the first phase detector and in response thereto, output a phase difference estimation signal. A variable delay circuit has an input terminal configured to receive the phase difference estimation signal and in response thereto, phase shift the second input signal.

Abstract: A control device for a travel motor mounted to a vehicle has a resolver which works as a rotation-angle sensor. The control device has a RDC which calculates a rotation-angle output value ? based on rotation detection signals Sa, Sb transferred from the resolver. The control device supplies electric power to the travel motor based on the rotation angle output value ?. The RDC calculates “sin(???)” as an error deviation ? based on the signals Sa and Sb and the rotation-angle output value ?. The RDC calculates an angular acceleration by multiplying the error deviation ? with a gain (=Ka·Kb), and integrates the angular acceleration two times in order to obtain a next rotation-angle output value. A gain control part of the RDC decreases the gain when the judgment means judges that the travel motor rotates at a constant rotation speed.

Abstract: The present invention provides a motor drive apparatus which improves a trade-off relation between a stable position detection and noise at its driving. A sensorless drive operation circuit calculates by operation a zero cross point (point p) of a voltage of a position detection phase at the next interval, using time information measured based on an output signal from a comparison circuit at the previous interval and the present interval. After the point p has been calculated, points a and b are detected by interrupting a predetermined time drive current.

Abstract: The invention provides an illumination system for a head-mounted display. The illumination system includes a plurality of illuminators which irradiate light over an area. The area has a central region where the light has a selective intensity, and outer regions on opposing sides of the central regions where the light has higher intensities than the selective intensity.

Abstract: Process for high-precision measurement of the phase relationship and phase displacement, respectively, of two pulse trains wherein rotational angles of two rotating bodies are quantized and converted by incremental shaft encoders into pulse trains, and the pulse trains are applicable for calculating the respective phase relationship and phase displacement, which comprises the steps of:a. counting the pulse trains in at least two different counters;b. forming a digital difference of the two counts;c. converting the digital difference into an analog signal;d. decoding the analog signal; ande. displaying the decoded analog signal;and a device for performing the process.

Abstract: A phase and speed control system for synchronizing the speed and controlling the phase relationship between a pair of aircraft engines, each engine having associated therewith a centrifugal governor, includes a phase comparator circuit which provides a pulse width modulated signal only to the governor coil of the engine having the slower initial rotational velocity. A variable delay on one input of the phase comparator may be adjusted to determine the relative rotational phase relationship between the engines.

Abstract: Low pressure in a vehicle tire is detected by an electronic system which compares the difference in phase between two cyclic signals and produces an output signal having a negative going pulse and a positive going pulse for each revolution of the tire. Each negative going pulse represents a decrease in phase between the two signals and is generated in response to a shorted coil passing through an electromagnetic field produced by an induction coil in a parallel resonant circuit which produces the second of the two signals. The first signal is produced by an oscillator and is used to excite the resonant circuit and as a reference signal. The coil is shorted by a closed switch in the tire when the pressure is normal. Abnormal tire pressure opens the switch and renders the coil ineffective. Each positive going pulse represents an increase in phase between the two signals and is generated in response to a ferrous metal plate passing through the field.

Abstract: A facsimile system incorporating an up-down counter to achieve framing between a facsimile transmitter and a facsimile receiver. The facsimile receiver initially has a sweep rate different from a standard sweep rate. The up-down counter counts the facsimile transmitter and receiver sweep rates and provides the count difference between the facsimile receiver sweep rate and the sweep rate at which the transmitter is operating; the count difference corresponds to the difference in sweep position between the facsimile transmitter and receiver. Speed control circuitry is used to change the facsimile receiver to the standard sweep rate upon a predetermined output from the up-down counter which signifies that the transmitting and receiving facsimile are in framing synchronization. A method of controlling the commencement of counting of the up-down counter and of the resulting synchronizing framing is also disclosed.