System and method for loading and unloading cargo

1 . A system for loading and unloading cargo, in an aircraft comprising a cargo hold, the system comprising:

a sensor configured to measure a total weight of the aircraft and a loaded cargo;

a controller configured to calculate, based on information from the sensor, a center of gravity of the aircraft; and

a device configured to adjust, based on control information received from the controller, the center of gravity by moving a position of the cargo in the cargo hold,

wherein the device configured to adjust the center of gravity comprises:

a movable plate configured to support and to move the cargo within the cargo hold, wherein the movable plate is spaced apart from a bottom and at least one sidewall of the cargo hold;

a plurality of air bearings, disposed between the movable plate and the bottom, configured to support and to float the movable plate; and

a driver connected to the movable plate and configured to move the movable plate being floated by the plurality of air bearings,

wherein the sensor comprises:

a first load sensor, connected to a landing gear of the aircraft, and configured to measure the total weight of the aircraft; and

a second load sensor, between the movable plate and the bottom of the cargo hold, configured to measure a weight of the cargo, and

wherein the second load sensor is coupled to an air bearing of the plurality of air bearings.

2 . The system according to claim 1 , wherein the controller is configured to:

calculate the center of gravity of the aircraft based on the measured total weight of the aircraft,

determine a preset center of gravity tolerance range for the measured total weight, and

determine whether the center of gravity is within the center of gravity tolerance range.

3 . The system according to claim 2 , wherein, based on a determination that the center of gravity is not within the center of gravity tolerance range, the controller is configured to:

drive the plurality of air bearings to float the movable plate from the plurality of air bearings by a predetermined height; and

drive the driver to move the movable plate to a different position.

4 . The system according to claim 3 , wherein the controller is configured to repeatedly accumulate and update the calculated center of gravity of the aircraft and an amount of movement of the movable plate.

5 . The system according to claim 1 , wherein the controller is configured to control the driver to move the floated movable plate to a second position that adjusts the center of gravity to be within the center of gravity tolerance range.

6 . The system according to claim 1 , wherein the controller is configured to control the driver to move the floated movable plate by amount based on the measured weight of the cargo.

7 . A method comprising:

receiving total weight information of an aircraft comprising a movable plate in a cargo hold of the aircraft, and calculating a center of gravity of the aircraft based on the total weight information, wherein the movable plate is configured to support and move a cargo within the cargo hold, and wherein the movable plate is spaced apart from a bottom and at least one sidewall of the cargo hold;

determining a preset center of gravity tolerance range based on a measured total weight;

measuring, by a load sensor coupled to an air bearing of a plurality of air bearings, a weight of the cargo, wherein the load sensor is disposed between the movable plate and the bottom of the cargo hold;

comparing the center of gravity with the center of gravity tolerance range to determine whether the center of gravity is within the center of gravity tolerance range; and

based on determining that the center of gravity is not within the center of gravity tolerance range, causing a position of the movable plate to move by:

causing, by the plurality of air bearings, the movable plate to be floated, wherein the plurality of air bearings are disposed between the movable plate and the bottom and are configured to support the movable plate; and

causing, via a driver connected to the movable plate, movement of the position of the floated movable plate.

8 . The method of claim 7 , wherein the causing the position of the movable plate to move comprises:

moving, by the driver, the floated movable plate to a second position that adjusts the center of gravity to be within the center of gravity tolerance range.

9 . The method of claim 7 , wherein the causing the position of the movable plate to move comprises causing the position of the movable plate to move in at least one of a longitudinal direction of the aircraft or a width direction of the aircraft.

10 . The method of claim 7 ,

wherein the causing the position of the movable plate to move comprises causing the position of the movable plate to move by amount based on the measured weight of the cargo.

11 . The method of claim 7 , further comprising performing a learning process by repeatedly accumulating and updating the calculated center of gravity of the aircraft and an amount of movement of the movable plate.

12 . The method of claim 7 , further comprising, based on determining that the center of gravity is within the center of gravity tolerance range, sending information indicating the center of gravity to a control system for flight of the aircraft.

13 . A system for loading and unloading cargo, in an aircraft comprising a cargo hold, the system comprising:

a sensor configured to measure a total weight of the aircraft and a loaded cargo;

a controller configured to calculate, based on information from the sensor, a center of gravity of the aircraft; and

a device configured to adjust, based on control information received from the controller, the center of gravity by moving a position of the cargo in the cargo hold,

wherein the device configured to adjust the center of gravity comprises:

a movable plate configured to support and to move the cargo within the cargo hold, wherein the movable plate is spaced apart from a bottom and at least one sidewall of the cargo hold;

a plurality of air bearings, disposed between the movable plate and the bottom, configured to support and to float the movable plate; and

a driver connected to the movable plate and configured to move the movable plate being floated by the plurality of air bearings,

wherein the sensor comprises a load sensor, between the movable plate and the bottom of the cargo hold, configured to measure a weight of the cargo, and

wherein the load sensor is coupled to an air bearing of the plurality of air bearings.