A work machine control system that controls a work machine including a member that rotates about a shaft line includes a target construction shape generation unit that generates a target construction shape indicating a target shape of a construction target of the work machine; and a determination unit that outputs first information when the member is present on an air side which is a side on which the work machine is present in relation to the target construction shape and outputs second information when the member is not present on the air side.

A wheel loader includes: a front frame; a bucket; a boom having a distal end connected to bucket, and a proximal end rotatably supported by front frame; a sensor configured to measure a distance between boom and a loading target; and a controller configured to control an action of wheel loader. The controller causes wheel loader to perform a predetermined action for collision avoidance on condition that a distance to be measured by sensor when wheel loader travels takes a value less than or equal to a threshold value.

A rear collision avoidance system and method for a machine with left and right side traction devices for moving the machine. Sensors monitor obstacles around the machine. A commanded reverse path is calculated based on operator traction device commands. If an obstacle is in the commanded reverse path, the system automatically adjusts the traction device commands to avoid collision with the obstacle. A time to collision can be calculated, and the traction device commands adjusted only when it is below a threshold. Adjusting the traction device commands to avoid collision can include determining reverse propel and steer components based on the traction device commands; and if the reverse propel is greater than a propel threshold then adjusting the traction device commands to reduce reverse propel but maintain the reverse path; and if steer is greater than propel then adjusting the traction device commands to reduce reverse propel.

A hydraulic excavator (1) provided with a controller (40) having a machine control section (43) that executes machine control for moving a work implement (1A) following a predetermined condition at the time of operation of operation devices (45a, 45b, and 46c) includes a level-of-intervention input device (96) that is operated by an operator. The controller includes a correction amount calculating section (43m) that calculates a correction amount of a level of intervention indicating a degree of intervention by the machine control in an operation of the work implement instructed through operation of the operation devices, based on an operation amount of the level-of-intervention input device. The machine control section executes the machine control to intervene in the operation of the work implement instructed through the operation of the operation devices at a level of intervention corrected based on the correction amount calculated at the correction amount calculating section.

A method for determining stability of a vehicle having a load suspended from the vehicle is provided. The method can include obtaining measurements from a plurality of sensors positioned on the vehicle, obtaining a measurement from a vehicle accelerometer operative to determine an inclination of the vehicle, determining a position of the load suspended from the vehicle, determining a slung load of the load suspended from the vehicle, using the determined slung load and the determined position of the load suspended from the vehicle, determining tipping moments acting on the vehicle, determining righting moments acting on the vehicle and determining a tipping stability based on the determined tipping moments and determined righting moments.

A controller 20 mounted on a hydraulic excavator 1 that is able to perform machine control transmits work situation parameters (machine body position, hydraulic working fluid temperature, bucket weight, and target surface gradient) to a management server 71, receives, from the management server, control command correction values that are calculated by the management server on the basis of the work situation parameters and that represent correction values for correcting control commands, and controls hydraulic actuators 5, 6, and 7 with corrected control commands that represent the control commands corrected on the basis of the control command correction values.

Provided is a working machine including first and second members, an angle detection device and a connection pin connected to the first and second members to rotate integrally with the second member relative to the first member. The angle detection device has a marker, an angle sensor and a guard member, which has a main guard portion covering the angle sensor and including an inner opposite surface opposed to an end surface of the projecting end portion and a guard-member-side engagement portion. One of the angle sensor and the marker is disposed on the inner opposite surface, the other disposed on the end surface. The first member has a first-member-side engagement portion engaging with the guard-member-side engagement portion to restrain the main guard portion from relative rotation. The guard member can contact with the connection pin to restrain the guard member from relative displacement to the projecting end portion.

A work vehicle includes an arm. An arm cylinder drives the arm. A direction control valve operates the arm cylinder by allowing supply of a hydraulic oil to the arm cylinder as a spool moves. An oil path is connected to the direction control valve. A pilot oil for moving the spool flows through the oil path. A proportional solenoid valve for arm excavation is provided in the oil path. An arm control member is provided for an operator to operate drive of the arm. An amount of operation of the arm control member is equal to or smaller than a prescribed value in a first operation state and greater than the prescribed value in a second operation state. A command current instructing an opening of the proportional solenoid valve for arm excavation is set to a constant value in the first operation state.

A control system for a work vehicle includes an actual topography acquisition device, a storage device, a soil amount acquisition device, and a controller. The actual topography acquisition device acquires actual topography information indicating an actual topography of a work target. The storage device stores design topography information indicating a final design topography. The soil amount acquisition device generates a soil amount signal indicating a held soil amount of the work implement. The controller acquires the actual topography information from the actual topography acquisition device and acquires the design topography information from the storage device. The controller generates a command signal for moving the work implement at position that is between the actual topography and the final design topography and is a predetermined distance above the actual topography. The controller acquires the soil amount signal and changes the predetermined distance based on the held soil amount.

A construction machine that can make a depressing force of a bucket during compaction work to be uniform without requiring an operator to perform a complicated operation is provided. A controller 18 determines whether or not compaction work is in progress, calculates a front distance R that represents a distance between a rotational pivot of a boom 4 and a predetermined position B in a back surface of a bucket 6, determines a target velocity of the bucket such that a velocity with which the bucket approaches a leveling target surface decreases with increasing values of the front distance, and, during the compaction work, notifies the operator of details of an operation of operation devices 9a and 9b for achieving the target velocity of the bucket or controls hydraulic actuators 4a to 6a so as to achieve the target velocity of the bucket.