Abstract: A lock device can be shifted between a locked state and an unlocked state. The lock device includes a lock pin, a solenoid, and a pressing unit. The lock pin is movable between a locked position where a propeller is locked and an unlocked position where the propeller is not locked. The pressing unit presses the lock pin to the locked position by a mechanical pressing force. The solenoid includes a solenoid coil and a plunger. When the solenoid coil is energized, the plunger moves the lock pin to the unlocked position against the mechanical pressing force.

Abstract: A flight control device performs a flight control process for causing an eVTOL to fly. In a step of the flight control process, the flight control device determines whether the eVTOL is capable of maintaining a stable attitude. In the step, it is determined whether the eVTOL is capable of maintaining the stable attitude even if driving of an abnormal motor is stopped. In the step, it is determined whether the eVTOL is capable of maintaining the stable attitude even if the abnormal motor continues driving. When it is determined that the eVTOL is capable of maintaining the stable attitude, the flight control device performs output adjustment of at least one of a normal motor and the abnormal motor to maintain the eVTOL at the stable attitude.

Abstract: Provided is a projection system using a projection device that simultaneously projects on a plurality of projection surfaces. A projection system includes: a user recognition unit that recognizes a user existing in a space; a projection environment recognition unit that recognizes a projection surface on which a video can be projected in the space; and a control unit that controls a projection device so as to project a video on the projection surface recognized by the projection environment recognition unit for the user recognized by the user recognition unit. The projection device can simultaneously project a video on a plurality of surfaces. The control unit controls a projection device so as to simultaneously project a video on two or more projection surfaces recognized by the projection environment recognition unit.

Abstract: In a control device including a control unit that controls an EPU for powering a rotor included in an electric aircraft, the EPU includes a motor, an inverter, a control circuit, and a first sensor that detects an operation-related value. If there is no a sudden change in the operation-related value detected by the first sensor, the control unit controls the EPU based on the operation-related value detected by the first sensor. When the sudden change occurs, the control unit stops using the operation-related value detected by the first sensor to control the EPU. After the occurrence of the sudden change, when the sudden change ends before a predetermined period elapses, the control unit resumes using the operation-related value detected by the first sensor to control the EPU, and when the sudden change has not ended, the control unit continues the stoppage.

Abstract: A control apparatus, which controls a drive motor that drives a rotor installed in an electrical aircraft, instructs the drive motor to selectively operate in at least two motor-control modes. The at least two motor-control modes include a flying motor-control mode for causing the electrical aircraft to fly, and a cleaning motor-control mode for cleaning the rotor. The control apparatus controls, in the cleaning motor-control mode, the drive motor such that a rotational frequency of the drive motor is lower than a predetermined human-audible frequency range.

Abstract: A rotating machine control device is provided with: an operating terminal for changing a parameter of the rotating machine; a clearance measuring device which measures the amount of clearance between a rotor and a casing; and a control device body. The control device body, in accordance with the amount of clearance measured by means of the clearance measuring device, determines an operating amount for the operating terminal so as to vary the rate of change in the parameter, and outputs the operating amount to the operating terminal.

Abstract: A system enables tool to process remote log files as if the log files were located locally. The system relies on technology, such a file system in user space (FUSE), to add log file search results to the local file system. In some embodiments, the log file search results are associated with virtual files in the local file system. A remote data store system communicates with the local system to provide the search results in response to a search query.

Abstract: An operation data acquisition unit is configured to acquire, from an operation data storage unit for storing operation data collected every first period from a power plant, the operation data collected during a latest second period that is longer than the first period. A unit profit amount calculation unit is configured to calculate an average amount of profit per unit time in relation to a unit amount of performance improvement of the power plant based on the operation data that has been acquired.

Abstract: A system enables tool to process remote log files as if the log files were located locally. The system relies on technology, such a file system in user space (FUSE), to add log file search results to the local file system. In some embodiments, the log file search results are associated with virtual files in the local file system. A remote data store system communicates with the local system to provide the search results in response to a search query.

Abstract: There is provided a method including: performing an upgrade of reducing a supply amount of cooling air supplied to a turbine and replacing at least some of components provided in the turbine with components adapted to the supply amount of cooling air; and changing a set value calculation function according to the post-upgrade supply amount of cooling air and the replaced components.

Abstract: A rotating machine control device is provided with: an operating terminal for changing a parameter of the rotating machine; a clearance measuring device which measures the amount of clearance between a rotor and a casing; and a control device body. The control device body, in accordance with the amount of clearance measured by means of the clearance measuring device, determines an operating amount for the operating terminal so as to vary the rate of change in the parameter, and outputs the operating amount to the operating terminal.

Abstract: A characteristic evaluation device is for a gas turbine that includes a compressor, a combustor, and a turbine includes a processor. The processor calculates, in gas-turbine characteristics including characteristics of at least one of the compressor, the combustor, and the turbine, a correction value for correcting influence due to environmental conditions in which the gas turbine is placed based on operation data of the gas turbine. The processor also calculates the gas-turbine characteristics corrected based on the correction value, and evaluates the gas turbine by comparing the gas-turbine characteristics after correction with a predetermined reference value.

Abstract: A combustor replacement method and a gas turbine plant capable of efficiently replacing a combustor using an existing facility. The combustor replacement method includes a step of separating, from a plurality of fuel supply systems, a first combustor that includes a plurality of nozzle systems connected to any of the plurality of fuel supply systems and supplied with fuel from the connected fuel supply systems, and removing the first combustor from a gas turbine plant. The method includes a step of attaching a second combustor that includes fewer nozzle systems than the first combustor to the gas turbine plant, and a step of providing communication between the fuel supply systems connected to the same nozzle system of the second combustor by a coupling pipe, and coupling the fuel supply systems and the second combustor.

Abstract: A characteristic evaluation device is for a gas turbine that includes a compressor, a combustor, and a turbine includes a processor. The processor calculates, in gas-turbine characteristics including characteristics of at least one of the compressor, the combustor, and the turbine, a correction value for correcting influence due to environmental conditions in which the gas turbine is placed based on operation data of the gas turbine, calculates the gas-turbine characteristics corrected based on the correction value, and evaluates the gas turbine by comparing the gas-turbine characteristics after correction with a predetermined reference value.

Abstract: There is provided a method including: performing an upgrade of reducing a supply amount of cooling air supplied to a turbine and replacing at least some of components provided in the turbine with components adapted to the supply amount of cooling air; and changing a set value calculation function according to the post-upgrade supply amount of cooling air and the replaced components.

Abstract: An operation data acquisition unit acquires, from an operation data storage unit for storing operation data collected every first period from a power plant, the operation data collected during the latest second period that is longer than the first period. A unit profit amount calculation unit calculates an average amount of profits per unit time in relation to a unit amount of performance improvement of the power plant on the basis of the acquired operation data.

Abstract: An intake air cooling system 100 for a gas turbine 18 is provided with: an intake duct 12 for leading intake air taken in from an intake-air inlet 22 to a compressor 14 of the gas turbine; a cooling part provided in the intake duct and configured to cool the intake air by heat exchange with a cooling medium which is introduced from an outside; a protruding step part 13 formed in a convex shape protruding from bottom surfaces 12a1, 12a2 of the intake duct disposed on a downstream side of the cooling part; and at least one drain hole 110 formed in the bottom surfaces 12a1, 12a2 of the intake duct disposed on the downstream side of the cooling part so as to discharge drain water, generated on a surface of the cooling part and dropping from the surface, to an outside of the intake duct.

Abstract: A combustor replacement method and a gas turbine plant capable of efficiently replacing a combustor using an existing facility. The combustor replacement method includes a step of separating, from a plurality of fuel supply systems, a first combustor that includes a plurality of nozzle systems connected to any of the plurality of fuel supply systems and supplied with fuel from the connected fuel supply systems, and removing the first combustor from a gas turbine plant. The method includes a step of attaching a second combustor that includes fewer nozzle systems than the first combustor to the gas turbine plant, and a step of providing communication between the fuel supply systems connected to the same nozzle system of the second combustor by a coupling pipe, and coupling the fuel supply systems and the second combustor.

Abstract: An intake air cooling system 100 for a gas turbine 18 is provided with: an intake duct 12 for leading intake air from an intake-air inlet 22 to a compressor 14 of the gas turbine, the intake duct having a vertical duct 12c and a manifold part 12d disposed on a downstream side of the vertical duct; a cooling part 26 provided in the intake duct to cool the intake air by heat exchange with a cooling medium which is introduced from an outside; a filter part 42 provided on an inlet side of the manifold part to remove impurities contained in the intake air introduced through the vertical duct; and a drain catcher 110 constituted by a gutter member provided immediately above the filter part along inner wall surfaces 12c1, 12c2 of the vertical duct, the drain catcher being configured to collect drain water flowing along the inner wall surfaces of the vertical duct.

Abstract: An intake air cooling system 100 for a gas turbine 18 is provided with: an intake duct 12 for leading intake air taken in from an intake-air inlet 22 to a compressor 14 of the gas turbine; a cooling part provided in the intake duct and configured to cool the intake air by heat exchange with a cooling medium which is introduced from an outside; a protruding step part 13 formed in a convex shape protruding from bottom surfaces 12a1, 12a2 of the intake duct disposed on a downstream side of the cooling part; and at least one drain hole 110 formed in the bottom surfaces 12a1, 12a2 of the intake duct disposed on the downstream side of the cooling part so as to discharge drain water, generated on a surface of the cooling part and dropping from the surface, to an outside of the intake duct.