A controller controls the steering device so as to cause a vehicle body to turn toward the left when a left steering lever is operated without a right steering lever being operated. The controller controls the steering device so as to cause the vehicle body to turn toward the right when the right steering lever is operated without the left steering lever being operated. The controller reduces the rotation speed of the engine when both the left steering lever and the right steering lever are operated and both the operation amount of the left steering lever and the operation amount of the right steering lever are equal to or greater than a first threshold.

A distance calculation unit calculates a bucket distance that is a distance between a point on a bucket and a target design surface representing a target shape of an excavation target. An intervention control unit calculates an intervention control amount to suppress a speed of work equipment such that the bucket does not intrude on the target design surface based on the bucket distance. An attachment control unit calculates an attachment control amount to rotate the bucket around an attachment axis such that an edge of the bucket and the target design surface approach each other in a parallel state. An attachment limiting unit limits rotation of the bucket around the attachment axis such that the bucket distance is not increased by a movement of the work equipment based on the intervention control amount and the attachment control amount.

A server and so forth are provided that enable an operator to gain experience in operation by a simulation while referring to a situation of an operation of a work machine by the operator himself/herself or another operator. A second operator can designate one time series of work environment images from archives registered in a database 102 through a remote input interface 210. Accordingly, the second operator can browse the time series of the designated work environment images on a remote output interface 220. The second operator can cause the remote output interface 220 to output a time series of simulation images which represent an action manner and an environment changing manner of a work machine at a virtual work site in accordance with a simulation operation manner in a remote operation mechanism 211.

A shovel includes a lower travelling body, an upper swiveling body that is mounted on the lower travelling body so as to freely swivel relative to the lower travelling body, an operator cab that is mounted on the upper swiveling body, and a monitor attaching base that is installed inside the operator cab so as to extend in right and left directions and includes a plurality of attaching units, to which a display device is attachable.

A shovel according to an embodiment of the present invention includes a lower traveling body, an upper turning body rotatably mounted on the lower traveling body, an operator's compartment provided to the upper turning body, a display device provided in the operator's compartment, and an input device provided in the operator's compartment. The display device is capable of displaying a setting screen for a construction support system using information and communication technology, and a function to switch a screen displayed on the display device to the setting screen is assigned to the input device.

The present disclosure provides methods for adjusting steering angle and articulation angle in an auto articulation operation of a work vehicle. The percentage of travel of a steering joystick of the work vehicle at least partially determines a steering desired angle change, which can be used to calculate a steering desired angle and an articulation desired angle change. The difference between the steering desired angle and a steering angle detected by a steering angle sensor is used to adjust the steering angle. The articulation desired angle change can be used to calculate an articulation desired angle. The difference between the articulation desired angle and an articulation angle detected by an articulation angle sensor is used to adjust the articulation angle.

One embodiment of a hydraulic system for a machine has a first hydraulic circuit including a first pump coupled to a first hydraulic actuator configured to move a first implement of the machine. A second hydraulic circuit includes a second pump coupled to a second hydraulic actuator configured to move a second implement. An electric motor mechanically couples to the first pump and to the second pump. An operator interface receives input from an operator requesting movement of the first and second implements. A controller communicatively coupled to the electric motor and to the operator interface determines, based on the requested movement of the first and second implements respectively, first and second flow allocations respectively for the first and second pumps and determines respective target displacements for the first and second pumps. The controller also determines first and second target electric motor speeds based on the target displacements for the first and second pumps, respectively, and controls the electric motor to operate at the larger of the first and second target electric motor speeds.

A tilt structure allows the tilt of a console to be changed through simple motion and has a simple configuration. The tilt structure includes: a second frame attached to an upper portion of a first frame and is swingable upward and downward; and a control member attached to the second frame and is tiltable backward and forward through a tilting shaft. The control member includes a guide part with a groove housing a first frame pin. A locked and unlocked state switch to each other by causing the control member to tilt. The locked state includes a pin engaged with any of the engagement parts. The unlocked state includes the pin disengaged. The tilt of the second frame relative to the first frame is changed by engaging the pin with an arbitrary engagement part of any of the engagement parts and changing a distance between the tilting shaft and pin.

A control system for controlling movement of a work element of a power machine can include a control device, and an operator input device in communication with the control device. The control device can be configured to receive, from the operator input device, a signal for controlling an actuator of the work element. The signal can be filtered, using a digital notch filter, to generate a filtered signal, and an actuator of the work element can be controlled based on the filtered signal.

A control method of a work machine includes: calculating a maximum flow rate of hydraulic oil discharged from a hydraulic pump; calculating a first target speed of working equipment including a bucket based on an operation amount of an operation device operated for driving a plurality of hydraulic actuators to which the hydraulic oil discharged from the hydraulic pump is supplied to drive the working equipment and a distance between the bucket and a target excavation landform; calculating a second target speed of the working equipment based on the maximum flow rate, and the operation amount of the operation device and the distance between the bucket and the target excavation landform; and outputting a control signal for controlling the hydraulic actuators based on a smaller one of the first target speed and the second target speed.