Abstract: A method of improving corrosion resistance of a cylinder cover including a port that is an intake port or an exhaust port. The cylinder cover is configured such that an annular cooling water passage is formed between an inner peripheral surface of the port and a valve seat ring when the valve seat ring is inserted in the port. The method includes forming a weld overlay layer on each of sealed regions of the inner peripheral surface of the port by laser metal deposition using a welding material made of a nickel-based alloy, a copper alloy, stainless steel, or a titanium alloy, the sealed regions being positioned at both sides of the cooling water passage, respectively.

Abstract: A relief valve includes: a housing; a plunger movable to each of a closed position and an open position; a differential pressure chamber; a spring member; a piston; and a damping chamber. The plunger includes a first damping passage penetrating the plunger and bringing an area outside the plunger and a through passage into communication. The piston includes a second damping passage penetrating the piston and bringing an area inside the piston and the damping chamber into communication. A communication space connected to each of the first damping passage and the second damping passage is formed between the plunger and the piston.

Abstract: A robot 100 includes: a base 1; an arm 3 coupled to the base 1 to be rotatable horizontally and formed by links 30 coupled to one another to be rotatable horizontally; and a hand 8 coupled to the arm 3 to be rotatable horizontally. A first link 31 that is at least one link of the links 30 has an internal space 40. The first link 31 has a partition 45 that partitions the internal space 40 into two container rooms each for housing a component, that is, a first container room 40A and a second container room 40B.

Abstract: In a robotic surgical system, a control device is configured or programmed to scale rotation speeds of a plurality of joints axes of a robot arm at predetermined ratios such that the rotation speeds of the plurality of joint axes become equal to or lower than limit value with respect to a received operation amount.

Abstract: A gas turbine engine according to one aspect of the present invention includes: an oil tank storing lubricating oil; and a cylindrical external case accommodating a compressor, a combustor, and a turbine. The oil tank is arranged along an outer peripheral surface of the external case so as to surround the external case.

Abstract: A gas turbine engine includes: at least one fuel pump arranged outside a casing; at least one electric motor that is arranged outside the casing and drives the at least one fuel pump; a fuel inflow member including a fuel inflow passage through which fuel to be sucked by the fuel pump flows; and a fuel outflow member including a fuel outflow passage through which the fuel discharged from the fuel pump flows toward a combustor. The fuel inflow member includes a heat exchanger portion that is thermally connected to the electric motor. The heat exchanger portion is adjacent to the electric motor and cools the electric motor by heat exchange between the electric motor and the fuel flowing through the heat exchanger portion.

Abstract: A robotic surgical system according to an embodiment may include: a surgical instrument including a pair of jaw members; an operation handle; and a surgical robot that includes a robot arm to which the surgical instrument is attached and which includes a drive part to drive a driven member, and a controller configured to drive the drive part based on a command jaw opening angle associated with an input to the input device for controlling an opening angle between the pair of jaw members. The controller is configured, when it is determined that a current value of the drive part excesses a predetermined threshold value during a closing operation of the pair of jaw members, to drive the drive part in a restriction mode in which a magnitude of the command jaw opening angle is restricted.

Abstract: An operation device for a surgical manipulator includes an input device that operates the surgical manipulator. The input device includes a plurality of joints and a plurality of motors that drives the plurality of joints, and reduction ratios in power transmission paths from the plurality of motors to the plurality of joints, respectively, are 0.5 or more and 30 or less.

Abstract: A thrust magnetic bearing device includes: a thrust disc fixed to a rotating body; and a pair of electromagnets provided so as to sandwich the thrust disc and be spaced apart from the thrust disc in a direction along a rotation axis. Each of the pair of electromagnets includes: a coil wound around the rotation axis of the rotating body; and a ring-shaped core accommodating the coil. The core includes a slit which is located at at least one circumferential position of the core and extends from an outside outer peripheral surface as a starting point toward a center of the core. The slit is formed in a range including at least an inside outer peripheral surface.

Abstract: A surgical robot includes: a plurality of manipulator arms; a platform to which the plurality of manipulator arms are coupled; a positioner configured to change the position and posture of the platform; a controller configured to control the positioner; and a user interface. The user interface includes: first manipulation tools each configured to receive an input of manipulation which selects one of a plurality of operating modes for changing the position and posture of the platform; and a single second manipulation tool configured to receive an input of manipulation information regarding the position and posture. The controller generates a command regarding the position and posture of the platform based on the acquired manipulation information and the selected operating mode and operates the positioner based on the generated command.

Abstract: A damper bearing includes: a bearing portion that supports a rotary shaft; and a tubular portion that is located around an outer circumference of the bearing portion, and has an outer surface attachable to a structural member. The bearing portion can be a hydrostatic bearing that supports the rotary shaft with a predetermined bearing clearance therebetween. The tubular portion includes a plurality of planar slits arranged circumferentially at predetermined intervals in the tubular portion. Each slit extends radially from an open end at the outer surface, and extends circumferentially in an arc to a predetermined point in a region between the outer and inner surfaces. The tubular portion includes a bearing fluid supply hole that is formed in a region where none of the planar slits is situated, and extends from the outer surface of the tubular portion to the bearing portion without passing through any of the planar slits.

Abstract: A charging system includes a charging station having: a base underwater; a pole extending in an upper-lower direction; and a power supplying portion. An AUV includes: an underwater main body; a power receiving portion; a holding device including a pair of guide and holding portions, the pair of guide portions guides the pole to a holding position after the pole contacts the guide portions from a proceeding-direction, the holding portion holds the pole to be rotatable relative to the pole; a thrust generating apparatus generates in a horizontal direction; and a control device controls the thrust generating apparatus. A light emitter at one of the base and the underwater main body, and a light receiver is provided at the other. The control device controls the thrust so the underwater main body reaches a rotational position where the light receiver receives light emitted, the rotational position set relative to the pole.

Abstract: A safety device according to the present disclosure includes a sensor that is attached to a self-propellable travel device or a robot provided to the travel device, is set with a given detection area on the basis of a position of the sensor, and detects an object existing within the given detection area. The safety device further includes a motion suppressing device that suppresses motions of the travel device and the robot, when the existence of the object within the given detection area is detected by the sensor, and an area changing device that changes the given detection area according to operating states of the travel device and the robot.

Abstract: A cooling structure for a turbine airfoil includes: a lattice structure body formed such that a first rib set and a second rib set arranged in a cooling passage are stacked on each other in a lattice pattern; and lattice communication portions that allow passages formed between ribs of the first rib set to communicate with passages formed between ribs of the second rib set. Each of the first and second rib sets has rib walls each including a pair of ribs that are inclined in directions opposite to each other relative to an imaginary boundary line extending in a movement direction of a cooling medium and that are in contact with each other on the imaginary boundary line. A plurality of lattice communication portions are formed between two lattice communication portions at opposite end portions of each rib that forms the rib wall.

Abstract: A deterioration diagnosis apparatus is for a mechanical apparatus including a power transmission mechanism that transmits power via a gear. The deterioration diagnosis apparatus includes: a storing unit that stores, in advance, a trend of change along with the operation of the mechanical apparatus, in consumption rate of an additive contained in lubricant used for the gear; and a determination unit that determines the period to be taken for the consumption rate of the additive to reach a predetermined value, based on the trend of change in the consumption rate of the additive.

Abstract: A master-slave system includes: a master unit including an operation end, an operation detector that detects operational information inputted by a force being applied to the operation end, and a force applier that gives a force to the operation end; a slave unit including an action part, and an operation part that moves the action part; and a control device. The control device outputs, according to a regulating condition and the operational information, a command for causing the operation part to operate the action part to carry out operation reflecting the regulating condition. The control device outputs, according to the regulating condition, a command for causing the force applier to give a force to the operation end against the input to the operation end that commands the given movement of the action part.

Abstract: A multicopter includes: a support; rotors supported by the support; an electrical equipment that supplies power for rotationally driving the rotors; a circuitly that controls a flight of an airframe by individually adjusting a rotor speed of each of the rotors; and a cooling unit that cools the electrical equipment. The cooling unit includes a heat exchanger, a refrigerant circulating through the heat exchanger and the electrical equipment, and a pump that circulates the refrigerant.

Abstract: A training data screening device includes a data evaluation model, a data evaluator, a memory, and a training data screener. The data evaluation model is constructed by machine learning on at least a part of the collected data, or by machine learning on data different from the collected data. The data evaluator evaluates the input collected data using the data evaluation model. The memory stores the evaluated data, which is the collected data evaluated by the data evaluator. The training data screener screens the training data tier constructing the learning model from the evaluated data stored by the memory by an instruction of an operator to whom an evaluation result of the data evaluator is presented, or automatically screens the training data based on the evaluation result.

Abstract: A multi-axis robot includes: a robot main body including a head and a movement mechanism that three-dimensionally moves the head; and a work tool attached to the head. The work tool includes: a first link pivotally supported on the head; a second link pivotally supported on a distal end of the first link; a first change mechanism that changes an angle of the first link to a central axis of the head; and a second change mechanism that changes an angle of the second link to the first link.

Abstract: A transmission structure of a helicopter according to one aspect is a transmission structure that transmits power from a prime mover to a rotary wing in the helicopter. The transmission structure includes: a housing; an input shaft that transmits the power of the prime mover to a gear arranged in the housing; a bearing supporting the input shaft in the housing such that the input shaft is rotatable, the bearing including an annular inner ring that holds the input shaft, an annular outer ring that is arranged outside the inner ring in a radial direction and fixed to the housing, and rolling elements sandwiched between the inner ring and the outer ring; and a sleeve that is sandwiched between an inner peripheral surface of the inner ring and the input shaft and is lower in heat conductivity than the inner ring and the input shaft.