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212results about How to "Maintenance operation" patented technology

Wind turbine having a control method and controller for performing predictive control of a wind turbine generator

The application describes a wind turbine having a control method and controller for performing predictive control of a wind turbine generator. Based on the measured instantaneous wind speed, it is known to provide control signals to a wind turbine in order to control the pitch of the wind turbine rotor blades and the speed of the generator. However, it is difficult using instantaneous wind speed measurements to achieve smooth control, due to finite response speeds of the associated electro-mechanical systems, as well as the constantly changing control system inputs. The predictive control system described in the application assumes a model of generator speed based on the values of the incident wind speed v(t) and the values of a control signal u(t) output to the wind turbine in a feed forward loop. Here, the control signal can be for one or more of controlling either the power setting of the generator, or the pitch angle of the rotor blades. The predictive controller uses a rolling time series of values for v(t) and u(t) and based on a predicted response of the generator speed w(t) optimises the time series control signal u(t). The predicted response of the generator speed w(t) is based on model, that can be refined in real time as the wind turbine operates.
Owner:VESTAS WIND SYST AS

System and method for collapsing VOQ'S of a packet switch fabric

A system and a method to avoid packet traffic congestion in a shared-memory switch core, while dramatically reducing the amount of shared memory in the switch core and the associated egress buffers, is disclosed. According to the invention, the virtual output queuing (VOQ) of all ingress adapters of a packet switch fabric are collapsed into its central switch core to allow an efficient flow control. The transmission of packets from an ingress buffer to the switch core is subject to a mechanism of request / acknowledgment. Therefore, a packet is transmitted from a virtual output queue to the shared-memory switch core only if the switch core can actually forward it to the corresponding egress buffer. A token based mechanism allows the switch core to determine the egress buffer's level of occupation. Therefore, since the switch core knows the states of the input and output adapters, it is able to optimize packet switching and to avoid packet congestion. Furthermore, since a packet is admitted in the switch core only if it can be transmitted to the corresponding egress buffer, the shared memory is reduced.
Owner:TWITTER INC

Semiconductor integrated circuit device

A semiconductor integrated circuit device endowed with memory circuits achieving high operation margin and low energy consumption with high speed and high integration. Composing a memory cell with a MOSFET having a first threshold voltage corresponding to a first voltage and supplying a selection signal corresponding to said first voltage to a word line by a word driver driven at said first voltage. Corresponding to a second voltage smaller than said first voltage, forming a selection signal sending to said word driver by a decoder comprising MOSFET with a second threshold voltage smaller than said first voltage, operating at said first voltage, and installing a first level shifting circuit including inverter circuits that form a selection signal corresponding to said first voltage by receiving a selection signal corresponding to said second voltage. Thereby, high operation margin and low energy consumption with high speed and high integration can be achieved.
Owner:HITACHI LTD

Electric driving machine

Even when a transient decrease has arisen in a battery voltage VBAT of a battery pack at startup of a motor that drives a flywheel, a power terminal Vcc and a reset terminal RES (or an input terminal IN of a reset IC) of a microcomputer are replenished with a normal voltage by the voltage accumulated by a capacitor of the backup power circuit, and hence a controller can maintain normal operation without involvement of faulty operation. As a result, even the battery pack whose battery has a smaller amount of remaining energy can be effectively utilized as the power source of an electric driving machine.
Owner:HITACHI KOKI CO LTD

Operating system monitoring setting information generator apparatus and operating system monitoring apparatus

InactiveUS20080155509A1Maintenance operationEfficiently monitoring the integrity or soundness of an OS in a deviceDigital computer detailsComputer security arrangementsComputer securitySoftware
Disclosed is an operating system monitoring setting information generator apparatus including: a monitoring setting information management unit configured to store monitoring setting information used for monitoring of an operating system monitoring apparatus; a monitoring setting information output unit configured to generate a monitoring setting information file including the monitoring setting information stored by the monitoring setting information management unit, version information and binding information indicating a correspondence with a monitoring target software program, and to output the generated monitoring setting information file; and a digital signature unit configured to generate a digital signature of the monitoring setting information file, and to add the generated digital signature to the monitoring setting information file.
Owner:NTT DOCOMO INC

Endoscope sucking operation apparatus

When a suction button is pushed in a pushing operation direction, the suction button pushes down longer lever ends of inversion levers, shorter lever ends of the inversion levers are pushed up based on a seesaw operation and the principle of leverage, and a piston body coupled through a coupling body moves in a direction opposed to a pushing operation direction against an urging force of a spring in cooperation with this upward movement. As a result, a valve moving portion moves away from a valve receiving portion to open a suction duct valve portion and suction is carried out, but the piston body retires to an outer periphery side of a bent duct when the valve portion is opened, and hence a suction duct is widened, thereby facilitating suction of even, e.g., a fluid having high viscosity.
Owner:FUJIFILM CORP

Wind turbine having a control method and controller for performing predictive control of a wind turbine generator

The application describes a wind turbine having a control method and controller for performing predictive control of a wind turbine generator. Based on the measured instantaneous wind speed, it is known to provide control signals to a wind turbine in order to control the pitch of the wind turbine rotor blades and the speed of the generator. However, it is difficult using instantaneous wind speed measurements to achieve smooth control, due to finite response speeds of the associated electro-mechanical systems, as well as the constantly changing control system inputs. The predictive control system described in the application assumes a model of generator speed based on the values of the incident wind speed v(t) and the values of a control signal u(t) output to the wind turbine in a feed forward loop. Here, the control signal can be for one or more of controlling either the power setting of the generator, or the pitch angle of the rotor blades. The predictive controller uses a rolling time series of values for v(t) and u(t) and based on a predicted response of the generator speed w(t) optimizes the time series control signal u(t). The predicted response of the generator speed w(t) is based on model, that can be refined in real time as the wind turbine operates.
Owner:VESTAS WIND SYST AS

Transport Refrigeration system

A transport refrigeration system, the transport refrigeration system including a container defining an enclosed volume and a refrigeration module coupled to the container. The refrigeration module is disposed to regulate the temperature of the enclosed volume and includes a compressor having a discharge port and a suction port, a condenser heat exchanger unit operatively coupled to the discharge port, an evaporator heat exchanger unit operatively coupled to the suction port, a condenser fan disposed proximate to the condenser heat exchanger unit, an evaporator fan disposed proximate to the evaporator heat exchanger unit; and a suction modulation valve coupled to the suction port. The transport refrigeration system further includes a bypass module coupled to the refrigeration module. The bypass module includes: a bypass mode switch having a normal operation position and bypass operation position; and an operational mode switch having a full cool position and fan only position. The transport refrigeration system also includes an electronic controller coupled to the bypass module. When the bypass mode switch is in the normal operation position the electronic controller regulates the operation of the refrigeration module. When the bypass mode switch is in the bypass operation position, the compressor, the condenser fan, the evaporator fan and the suction modulation valve are selectively operated by the position of the operational mode switch.
Owner:CARRIER CORP
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