摘要:
An arm load control system for a work vehicle including a controller comprising a memory and a processor. The controller is configured to determine whether a lift arm is in a maximum load configuration based on a position of the lift arm relative to a chassis of the work vehicle and output a control signal to a propulsion assembly of the work vehicle indicative of instructions to adjust a tractive effort of the work vehicle based on whether the lift arm is in the maximum load configuration.
摘要:
A loader control system includes: a boom position calculation unit configured to calculate a position of a boom rotatably supported by a vehicle body of a loader; a bucket attitude calculation unit configured to calculate an attitude of a bucket rotatably supported by the boom; a determination unit configured to determine whether the attitude satisfies a predetermined condition on the basis of the attitude and a reference attitude of the bucket in dumping movement; and a work machine control unit configured to cause the bucket to carry out the dumping movement, and output a control signal to cause the boom to carry out lifting movement when the attitude is determined to satisfy the predetermined condition.
摘要:
An estimate of the relative attitude between an implement and a vehicle body is computed from a body angular velocity measurement received from at least one body gyro mounted on the vehicle body and from an implement angular velocity measurement received from at least one implement gyro mounted on the implement. A first system state vector estimate corresponding to a first time instant includes a representation of a first relative attitude estimate. An updated system state vector is computed based at least in part on the first system state vector estimate, the body angular velocity vector measurement, and the implement angular velocity vector measurement. A second system state vector estimate corresponding to a second time instant is predicted based at least in part on the updated system state vector and a time-dependent system model. The second system state vector estimate includes a representation of a second relative attitude estimate.
摘要:
An earthmoving machine comprises a sensor, an implement, and control architecture comprising a controller and configured to facilitate movement in response to a signal indicative of a measured implement position and an implement control value comprising a gain value associated with implement speed. The controller is programmed to execute machine readable instructions to generate a surface-based cost function (SBCF) value based on the signal, determine whether the SBCF value is acceptable to lock the gain value, and generate a noise value that is based on an error between the signal and a target signal when the SBCF value is unacceptable, determine whether the noise value is acceptable to lock the gain value, adjust the gain value to control the implement speed when the noise value is unacceptable until the SBCF value or the noise value is acceptable, and operate the machine based on the locked gain value.
摘要:
A method or system for controlling a vehicle comprises entering a programming mode or a guidance mode based on user input to a switch. The user can enter a guidance program in accordance with a predetermined sequence of inputs of the switch by the user, where readiness for each successive input is indicated by a light source. A guidance mode is managed for controlling an implement height in accordance with the entered guidance program. A height sensor can sense an observed height or elevation of an implement of the vehicle (e.g., relative to the absolute target height of the implement above the ground). The observed height is controlled in accordance with the guidance program (e.g., the target height) if the system or the data processor is operating in a guidance mode.
摘要:
On a dozer, a semi-automatic system automatically translates a joystick to control blade elevation and provides an indicator display to guide manual control of blade slope angle. A mechanical linkage operably couples the joystick to an electrical motor. A computational system receives measurements from measurement units mounted on the dozer; calculates estimated values of elevation and slope angle; compares the estimated values to reference values; and calculates error and control signals. Drivers generate a motor drive signal and a display drive signal. In response to the motor drive signal, the electrical motor translates the joystick to control elevation. In response to the display drive signal, the indicator display generates a graphical representation of the status of slope angle. When the operator needs to take manual control, a proximity sensor detects the presence of at least a portion of the operator's hand, wrist, or forearm and disengages automatic control of elevation.
摘要:
A work vehicle may include a chassis, a ground-engaging blade, a sensor, and a controller. The ground-engaging blade may be movably connected to the chassis via a linkage configured to allow the blade to be raised or lowered relative to the chassis. The sensor may be connected to the chassis at a fixed relative position to the chassis and configured to provide a pitch signal indicative of a rotational velocity in a pitch direction. The controller may be configured to receive the pitch signal and send a command to raise or lower the blade, the command based on a first gain and the pitch signal when the pitch signal indicates a rotational velocity in a first direction and based on a second gain and the pitch signal when the pitch signal indicates a rotational velocity in a second direction.
摘要:
Terrain-based machines are provided comprising a translational chassis movement indicator, a terrain-based implement, an implement inclinometer, and an implement state estimator. The translational chassis movement indicator provides a measurement indicative of movement of the machine chassis in one or more translational degrees of freedom. The implement inclinometer comprises (i) an implement accelerometer, which provides a measurement indicative of acceleration of the terrain-based implement in one or more translational or rotational degrees of freedom and (ii) an implement angular rate sensor, which provides a measurement of a rate at which the terrain-based implement is rotating in one or more degrees of rotational freedom. The implement state estimator generates an implement state estimate that is based at least partially on (i) implement position signals from an implement angular rate sensor and an implement accelerometer, and (ii) signals from the translational chassis movement indicator and the implement inclinometer.
摘要:
A mobile working machine includes a working arm which is mounted in an articulated manner, by a first end, on a revolving superstructure of the working machine, and a tool which is mounted in a displaceable manner on a second end of the working arm. The mobile working machine includes a position control device of a working arm. At least one inclination sensor is arranged on the revolving superstructure and at least one inclination sensor is arranged on the working arm. Also, at least one rotation rate sensor is arranged on the working arm. The working machine further includes a calculation unit for processing the signals of the at least one inclination sensor, of at least one additional inclination sensor, and of at least one rotational rate sensor.
摘要:
A work vehicle includes one or more leanable wheels, in which the lean angle of each leanable wheel is automatically controlled according to one or more external factors. Factors influencing the lean angle of each leanable wheel may include: draft load arising from externally imposed forces, such as forces arising from moving earthen materials with a vehicle-mounted moldboard; the rotational position of such a moldboard with respect to direction of travel; turning radius of the vehicle during a turning maneuver; engine speed and/or transmission gear; and the angle of the vehicle itself with respect to vertical (i.e., whether the vehicle is on sloped ground). A control system may automatically adjust wheel-lean depending on inputs indicative of any combination of the above-mentioned external factors.