According to the present disclosure, a steering system and method for a machine includes a vehicle control system configured to command steering of the machine, and a steering sensor in communication with the vehicle control system. The steering sensor is configured to detect a position of a steering actuator of the machine. The vehicle control system is configured to detect an acceleration rate of the machine and to command steering of the machine based at least in part on the position of the steering actuator and the acceleration rate of the machine.

A paving machine for spreading, leveling and finishing concrete having a main frame, center module, bolsters laterally movably, and a crawler track associated with respective aft and forward ends of the bolsters. A bolster swing leg for each crawler track supports an upright jacking column. A worm gear drive permits rotational movements of the crawler track and the jacking column. A hinge bracket is interposed between each swing leg and a surface of the bolsters to enable pivotal movements of the swing leg. A length-adjustable holder engages the pivot pin on the hinge bracket and pivotally engages the swing leg. The holder permits pivotal motions of the swing leg in its length-adjustable configuration and prevents substantially any motion of the swing leg in its fixed-length configuration. A feedback loop cooperates with transducers keeping the crawler tracks position. The paving machine can be reconfigured into a narrowed transport configuration.

Provided is a travel operation device for a crawler aerial work vehicle equipped with an operation panel that can be operated with one hand and that provides stable operating conditions even when swayed from side to side. A travel operation device 10 comprises an operation panel 11 that is disposed on the deck 4 of a self-propelled crawler aerial work vehicle 1 and a controller 70 that controls the rotation of a left-side motor 60a, which drives a left-side endless track, and a right-side motor 60b, which drives a right-side endless track, according to the operation of an operating stick 20 that is disposed on the operation panel 11. The operating stick 20 of the operation panel 11 is composed of: an operating stick body 21 that can be tilted only in one axial direction back and forth from the neutral position; a left-swivel switch 24; a right-swivel switch 25; and an enable switch 22 that enables the operation of the switches. The switches are arranged at positions on the operating stick body 21 where the left-swivel switch 24 and/or the right-swivel switch 25 can be operated while the enable switch 22 is pressed with fingers gripping the operating stick body 21.

A traveling operation device of a crawler-type aerial work platform including an operation of an enable switch by one hand is provided. An enable switch and a changeover switch are disposed on an operation rod main body at positions where the enable switch and the changeover switch are operable by fingers gripping the operation rod main body of an operation rod during traveling so that all of them are operable by one hand. When a controller receives a switching command signal in accordance with the operation of the changeover switch in a state of usual travel control according to tilt of the operation rod in front-rear and right-left directions, the controller stops the usual travel control to transition the usual travel control to spin turn control that rotates motors in mutually opposite directions and turns the platform on the spot.

A method of controlling a vehicle during a braking operation includes providing a first and a second brake actuator, a brake input device, a steer input device, and a cross-drive transmission having two outputs and a controller. The method includes detecting a first output speed at the first output and a second output speed at the second output, and receiving a brake input request and a steer input request. The method also includes determining a differential output speed based on the first output speed and the second output speed, and comparing the differential output speed to a first threshold, the brake input request to a second threshold, and the steer input request to a third threshold. The method includes determining the first or the second output is locked during the braking operation, and controlling the first or the second brake actuator based on which output is determined to be locked.

A joystick assembly for a working machine having a working arm includes a controller configured to control a plurality of machine functions, a first electronic joystick in communication with the controller, and actuators in communication with the controller. Each actuator is configured to actuate a function associated with the working arm. The first electronic joystick comprises four axes of movement, and the first electronic joystick is configured to transmit electronic signals to the controller in response to being displaced along an axis from a neutral position. The controller is configured to receive the electronic signals from the first electronic joystick, and to transmit an electrical signal to one or more actuators to actuate the actuators. The joystick assembly is configured such that the controller actuates a different actuator for controlling a different function associated with the working arm, dependent upon the axis of displacement of the first electronic joystick.

A system for controlling the wheel or track motors of a vehicle based on information from a joystick-type control. In one embodiment, the system includes a joystick control configured to generate X and Y coordinates, and a vehicle controller configured to receive the X and Y coordinates from the joystick control and to determine an adjusted X and Y coordinate combination for each of four vehicle control quadrants. The four vehicle control quadrants include a right-reverse quadrant, a right-forward quadrant, a left-reverse quadrant, and a left-forward control quadrant. The adjusted X and Y coordinate combination for a particular control quadrant is determined based on a control value for that quadrant and a previous control value.

Disclosed herein are an anti-stall control method and system for a tracked vehicle. The system includes a control module that includes a processor and a storage medium for storing computer programming code. The computer programming code defines a set of behaviour states including: a start state, a tramming state, and at least one corrective state. Each behaviour state has an associated set of behaviour controls for governing control of tracks of the vehicle. The computer programming code, executed on the processor, performs the method steps of: assigning an initial start state, wherein the tracks of the tracked vehicle are stationary; changing to the tramming state, on receipt of instructions to move the tracked vehicle, wherein tramming behaviour controls control the tracks of the tracked vehicle to operate in the same direction; and changing to a corrective states when corrective state conditions associated with that corrective state are satisfied.

A power machine can include a control device configured to select a ground-engagement mode from a plurality of ground-engagement modes. An operator input can be received from an operator input device to command movement of one or more drive actuators to provide turning travel. The one or more drive actuators can be commanded to provide modified turning travel based on the selected ground-engagement mode.

A system and method for differential traction drive and steering axis coordination for an autonomous mower or other turf device includes initiating a steering motion based on determining a target forward speed and a steering rotational speed, calculating a left wheel speed and a right wheel speed, and applying the left and right wheel speeds, wherein the steering rotational speed is driven by a steering motor and the traction wheels associated with the autonomous mower, and the left and right wheel speeds are based on the target forward speed, a distance from a steering axle to the center of the respective wheel, and the steering rotational speed.