Various example embodiments relate to motion control of a target such as a suspended load. An apparatus may comprise: a floating base comprising an exteroceptive observation system configured to measure a position or velocity of at least one target with respect to a reference coordinate frame moving with the floating base. The floating base may further comprise an inertial measurement unit configured to measure at least one inertial state of the floating base with respect to an inertial reference coordinate frame. Position or velocity compensation for the at least one target may be performed based on the at least one inertial state of the floating base.

Various example embodiments relate to motion control of a target such as a suspended load. An apparatus may comprise: a floating base comprising an exteroceptive observation system configured to measure a position or velocity of at least one target with respect to a reference coordinate frame moving with the floating base. The floating base may further comprise an inertial measurement unit configured to measure at least one inertial state of the floating base with respect to an inertial reference coordinate frame. Position or velocity compensation for the at least one target may be performed based on the at least one inertial state of the floating base.

A gantry drive system includes: a first motor configured to drive a driving object along a first axis; a second motor configured to drive the driving object along a second axis parallel with the first axis; and a motor control system configured to control the first and second motors. The motor control system includes a mode switch that performs a switching between a first control mode in which a position of the driving object on each of the first and second axes is individually controlled while reducing an inter-axis positional deviation between the first and second axes, and a second control mode in which a rotational state of the driving object is controlled while controlling a position of the driving object, based on detected positions of the driving object on the first and second axes.

A gantry drive system includes: a first motor configured to drive a driving object along a first axis; a second motor configured to drive the driving object along a second axis parallel with the first axis; and a motor control system configured to control the first and second motors. The motor control system includes a mode switch that performs a switching between a first control mode in which a position of the driving object on each of the first and second axes is individually controlled while reducing an inter-axis positional deviation between the first and second axes, and a second control mode in which a rotational state of the driving object is controlled while controlling a position of the driving object, based on detected positions of the driving object on the first and second axes.

To accurately obtain the shapes of a hoisting load and an object located near the hoisting load, and the height of the ground surface, and present an accurate warning display when the hoisting load approaches the object. A guide information display device is equipped with a data processing unit which: estimates the top surface of a hoisting load, the ground surface, and the top surface of the object, on the basis of a data point group obtained by a laser scanner; generates guide frames representing guide frames that surround the top surface of the hoisting load and the top surface of the object, and also generates height information and height information which represent the elevation of the hoisting load and the object; calculates the distance between the hoisting load and the object on the basis of the estimated top surfaces of the hoisting load and object; and outputs a warning display when the distance is equal to or less than a threshold. The guide information display device is also equipped with a data display unit for displaying guide information obtained by overlapping an image captured by a camera with the guide frames, the height information and the height information, and the warning display which were generated by the data processing unit.

To accurately obtain the shapes of a hoisting load and an object located near the hoisting load, and the height of the ground surface, and present an accurate warning display when the hoisting load approaches the object. A guide information display device is equipped with a data processing unit which: estimates the top surface of a hoisting load, the ground surface, and the top surface of the object, on the basis of a data point group obtained by a laser scanner; generates guide frames representing guide frames that surround the top surface of the hoisting load and the top surface of the object, and also generates height information and height information which represent the elevation of the hoisting load and the object; calculates the distance between the hoisting load and the object on the basis of the estimated top surfaces of the hoisting load and object; and outputs a warning display when the distance is equal to or less than a threshold. The guide information display device is also equipped with a data display unit for displaying guide information obtained by overlapping an image captured by a camera with the guide frames, the height information and the height information, and the warning display which were generated by the data processing unit.

It is provided a container crane including: a spreader configured to controllably attach to a container; a container trolley to which the spreader is attached via cables, the container trolley being provided on an upper part of the container crane and being horizontally movable along a first direction; a first sensor arrangement mounted on the container trolley, the first sensor arrangement being usable to determine a position of the container; a second sensor arrangement being usable to determine a position of a target; and at least one reference marker provided fixed, in at least two dimensions, to a horizontal support provided along the first direction between vertical structures of the container crane, the at least one reference marker being provided vertically lower than the first sensor arrangement and the at least one reference marker being detectable by the first sensor arrangement.

It is provided a container crane including: a spreader configured to controllably attach to a container; a container trolley to which the spreader is attached via cables, the container trolley being provided on an upper part of the container crane and being horizontally movable along a first direction; a first sensor arrangement mounted on the container trolley, the first sensor arrangement being usable to determine a position of the container; a second sensor arrangement being usable to determine a position of a target; and at least one reference marker provided fixed, in at least two dimensions, to a horizontal support provided along the first direction between vertical structures of the container crane, the at least one reference marker being provided vertically lower than the first sensor arrangement and the at least one reference marker being detectable by the first sensor arrangement.

A bridge crane anti-swing method based on first-order dynamic sliding mode variable structure includes steps of: constructing a two-dimensional bridge crane system model and a crane system control model, respectively; performing differentiation on two sliding mode surfaces containing swing angle dynamic change and rope length dynamic change to obtain a crane position dynamic sliding surface s1 and a rope length dynamic sliding mode surface s2, respectively; combining a displacement x, a length l and a swing angle θ in the two-dimensional bridge crane system model with the crane position dynamic sliding surface s1 and rope length dynamic sliding mod surface s2 in the crane system control model to obtain a relationship among a horizontal traction force f1, an along-rope traction force f2, the displacement x, the length l and the swing angle θ.

A bridge crane anti-swing method based on first-order dynamic sliding mode variable structure includes steps of: constructing a two-dimensional bridge crane system model and a crane system control model, respectively; performing differentiation on two sliding mode surfaces containing swing angle dynamic change and rope length dynamic change to obtain a crane position dynamic sliding surface s1 and a rope length dynamic sliding mode surface s2, respectively; combining a displacement x, a length l and a swing angle θ in the two-dimensional bridge crane system model with the crane position dynamic sliding surface s1 and rope length dynamic sliding mod surface s2 in the crane system control model to obtain a relationship among a horizontal traction force f1, an along-rope traction force f2, the displacement x, the length l and the swing angle θ.