Abstract: A landing gear system may include: a casing coupled to a fuselage of an aircraft, such as an urban air mobility vehicle; a steering, one side of which is inserted into the casing and the other side of which is connected to a tire; a magnetorheological (MR) damper including a cylinder coupled to the casing and a piston coupled to the steering rod; a sensor unit configured to measure a condition of the urban air mobility vehicle; and a controller configured to control damping force of the MR damper based on measurement data of the sensor unit. The sensor unit may include a first sensor for measuring a stroke of the MR damper and a second sensor for measuring an acceleration of the casing.

Abstract: An apparatus and method of preventing ground resonance of an aircraft, in which ground resonance may be prevented by detecting vibrations caused by rotation of a rotor in the aircraft and adjusting stiffness and damping performance of a landing gear, are provided. The apparatus for preventing ground resonance of an aircraft includes a at least one sensor for monitoring rolling of a fuselage of the aircraft according to rotation of a rotor; a vibration sensing unit installed on the fuselage and detecting vibrations of the fuselage; a damper installed on the fuselage, constituting landing gear, and varying a natural frequency of the fuselage; and a control unit controlling stiffness of the damper based on a phase difference between vibration signals and the rolling of the fuselage.

Abstract: The present disclosure relates to a skid device for aircraft and a method for controlling the same that may implement an optimal soft landing even under varied landing conditions in various environments, and the skid device may include: at least one support leg having a hollow portion and fixed to a lower portion of a fuselage; a skid connected to an end of the support leg; a magnetic field generator installed in the hollow portion; and a magnetorheological material accommodated in the hollow portion.

Abstract: The present disclosure relates to a system and a method for loading and unloading a cargo that can measure a change and distribution of load, learn an optimal center of gravity, and ensure control stability by easily adjusting the center of gravity and maintaining balance in an aircraft. The system for loading and unloading a cargo may include: a sensing unit configured to measure a total weight of the aircraft and a load of a loaded cargo; a controller configured to calculate a center of gravity of the aircraft using information obtained by the sensing unit; and a device for adjusting a center of gravity operated under control of the controller and configured to move a position of the cargo in the cargo hold.

Abstract: A device for adjusting a center of gravity is provided. The device can measure a change and/or distribution of a load in a vehicle. The device can adjust a center of gravity to ensure control stability and maintain balance in an aircraft. The device may include: a movable plate configured to support cargo in a cargo hold; a plurality of air bearings disposed between the movable plate and a bottom of the cargo hold and configured to support and/or float the movable plate; and a first driving unit installed in the cargo hold and connected to the movable plate. The first driving unit may be configured to move the movable plate, if the movable plate is floated.

Abstract: A landing gear control apparatus for an air mobility vehicle may include a shaft of the landing gear control apparatus, the shaft deployed when the air mobility vehicle is landing or driving; a tire provided at one end portion of the shaft; a steering rod coupled to the shaft in a direction crossing a longitudinal direction of the shaft to steer the tire by rotating the shaft; a rotation load sensor mounted on the steering rod and sensing a rotation load applied to the steering rod; a MR damper coupled to the shaft to surround thereof, having a MR fluid filled in the damper, and configured for changing, by the controller, a damping force of the MR damper for rotation of the shaft according to a current applied to the MR damper; and a controller for controlling a current applied to the MR damper on the basis of the rotation load detected by the rotation load sensor.

Abstract: The present disclosure relates to a skid device for aircraft and a method for controlling the same that may implement an optimal soft landing even under varied landing conditions in various environments, and the skid device may include: at least one support leg having a hollow portion and fixed to a lower portion of a fuselage; a skid connected to an end of the support leg; a magnetic field generator installed in the hollow portion; and a magnetorheological material accommodated in the hollow portion.

Abstract: A landing gear system may include: a casing coupled to a fuselage of an aircraft, such as an urban air mobility vehicle; a steering, one side of which is inserted into the casing and the other side of which is connected to a tire; a magnetorheological (MR) damper including a cylinder coupled to the casing and a piston coupled to the steering rod; a sensor unit configured to measure a condition of the urban air mobility vehicle; and a controller configured to control damping force of the MR damper based on measurement data of the sensor unit. The sensor unit may include a first sensor for measuring a stroke of the MR damper and a second sensor for measuring an acceleration of the casing.

Abstract: A gear system for a mobile object may include: a first shaft unit configured to adjust a driving direction of a fuselage; a second shaft unit coupled to the first shaft unit and configured to retract the first shaft unit into the fuselage or extend the first shaft unit, retracted into the fuselage, from the fuselage; a driver configured to supply driving force through which the first shaft unit and the second shaft unit can move; and a power transmission unit configured to selectively transmit the driving force of the driver to one of the first shaft unit and the second shaft unit by coupling the driver to one of the first shaft unit and the second shaft unit.

Abstract: A cargo packaging system for a mobility vehicle may include a housing mounted on the mobility vehicle; a plurality of air cushions provided at a plurality of positions on an internal surface of the housing, and applying a pressure to and cushioning the cargo accommodated in the housing in a plurality of directions during expansion thereof; an air charging part connected to the plurality of air cushions and configured for injecting gas into each air cushion of the housing and controlling a flow rate or a pressure of the injected gas; and an outlet controlled by the air charging part and discharging the gas injected into each air cushion to the outside of the outlet.

Abstract: A cargo packaging system for a mobility vehicle may include a housing mounted on the mobility vehicle; a plurality of air cushions provided at a plurality of positions on an internal surface of the housing, and applying a pressure to and cushioning the cargo accommodated in the housing in a plurality of directions during expansion thereof; an air charging part connected to the plurality of air cushions and configured for injecting gas into each air cushion of the housing and controlling a flow rate or a pressure of the injected gas; and an outlet controlled by the air charging part and discharging the gas injected into each air cushion to the outside of the outlet.

Abstract: A landing gear control apparatus for an air mobility vehicle may include a shaft of the landing gear control apparatus, the shaft deployed when the air mobility vehicle is landing or driving; a tire provided at one end portion of the shaft; a steering rod coupled to the shaft in a direction crossing a longitudinal direction of the shaft to steer the tire by rotating the shaft; a rotation load sensor mounted on the steering rod and sensing a rotation load applied to the steering rod; a MR damper coupled to the shaft to surround thereof, having a MR fluid filled in the damper, and configured for changing, by the controller, a damping force of the MR damper for rotation of the shaft according to a current applied to the MR damper; and a controller for controlling a current applied to the MR damper on the basis of the rotation load detected by the rotation load sensor.