Abstract: A liquefied gas storage tank includes a corner block disposed on a corner portion, wherein the corner block includes a lower block, an upper block and an upper connecting block, the upper block includes a first inner fixing unit and a second inner fixing unit respectively provided inside a first surface and a second surface, bonded and connected to a secondary barrier, and each having a structure in which a primary inner plywood, a primary corner insulating material, and a primary outer plywood are stacked, and an inner bent portion installed at a corner spatial portion between the first inner fixing unit and the second inner fixing unit, and both side surfaces of the inner bent portion that are perpendicular to the secondary barrier each have a height reduced from a total height of each of the first and second inner fixing units.

Abstract: The liquefied gas storage tank includes a primary barrier, a primary insulation wall, a secondary barrier, and a secondary insulation wall. In a state where unit elements are arranged adjacent to each other, each of the unit elements being formed by stacking the secondary insulation wall, the secondary barrier, and a fixed insulation wall which is a part of the primary insulation wall, the primary insulation wall may comprise: a connection insulation wall provided in the space between the adjacent fixed insulation walls; first slits formed between the fixed insulation walls and the connection insulation wall when the connection insulation wall is inserted and installed between the adjacent fixed insulation walls; a plurality of second slits formed in a lengthwise direction and a widthwise direction of the fixed insulation walls; and a first insulating filler material for filling the first slits.

Abstract: A motor control apparatus of a motor driven power steering (MDPS) system may include: a steering logic controller configured to calculate a current command value for motor control, and transmit the current command value; a current measurement sensor configured to measure a current applied to the motor; and a controller configured to calculate a motor position increment based on the current command value received from the steering logic controller, the measured current value received from the current measurement sensor, and previously stored motor parameters, estimate a current motor position by integrating the calculated motor position increments, and control the motor using the estimated current motor position.

Abstract: An apparatus for compensating a steering angle signal and motor angle signal of an MDPS system may include: a motor torque compensator configured to compensate for mechanical deformation; an angular speed compensator configured to compensate for a difference between a steering angle and a motor angle; a sensor characteristic compensator configured to compensate for a steering position error of the steering angle sensor; and a hysteresis compensator configured to compensate for a hysteresis characteristic of the MDPS system.

Abstract: A motor control apparatus of a motor driven power steering (MDPS) system may include: a steering logic controller configured to calculate a current command value for motor control, and transmit the current command value; a current measurement sensor configured to measure a current applied to the motor; and a controller configured to calculate a motor position increment based on the current command value received from the steering logic controller, the measured current value received from the current measurement sensor, and previously stored motor parameters, estimate a current motor position by integrating the calculated motor position increments, and control the motor using the estimated current motor position.

Abstract: A motor driven power steering system may include: a steering angle sensor configured to sense a steering angle of a steering wheel; a motor current sensor configured to sense a current of a motor; an encoder configured to sense a position of the motor; a vehicle speed sensor configured to sense a speed of a vehicle; a virtual torque estimation unit configured to estimate, when an error of a torque sensor is detected, a virtual torque using the position of the motor, the steering angle of the steering wheel, and the current of the motor; and an assist torque calculation unit configured to calculate an assist torque for operation of the motor using the steering angle of the steering wheel, the speed of the vehicle, and the virtual torque.

Abstract: An apparatus for compensating a steering angle signal and motor angle signal of an MDPS system may include: a motor torque compensator configured to compensate for mechanical deformation; an angular speed compensator configured to compensate for a difference between a steering angle and a motor angle; a sensor characteristic compensator configured to compensate for a steering position error of the steering angle sensor; and a hysteresis compensator configured to compensate for a hysteresis characteristic of the MDPS system.

Abstract: A motor driven power steering system may include: a steering angle sensor configured to sense a steering angle of a steering wheel; a motor current sensor configured to sense a current of a motor; an encoder configured to sense a position of the motor; a vehicle speed sensor configured to sense a speed of a vehicle; a virtual torque estimation unit configured to estimate, when an error of a torque sensor is detected, a virtual torque using the position of the motor, the steering angle of the steering wheel, and the current of the motor; and an assist torque calculation unit configured to calculate an assist torque for operation of the motor using the steering angle of the steering wheel, the speed of the vehicle, and the virtual torque.