Abstract:
The present invention is a method for controlling a ground vehicle, for automated steering control of the vehicle or the like. The method of the present invention includes using a GPS receiver or the like and an inertial gyro or the like for providing automated steering control of the ground vehicle. A difference between a measured off-track error and a lateral error command is fed into a lateral error control loop, producing a lateral velocity command. Then, a difference between a measured lateral velocity and the lateral velocity command is fed into a lateral velocity control loop, producing a yaw rate command. Finally, a difference between a measured yaw rate, the yaw rate command, and a curved track yaw rate for the intended path of the vehicle is computed and fed into a yaw rate control loop, producing a valve command for steering the ground vehicle on or towards its intended path. Inputs such as measured wheel slip and the like are used to estimate the steering authority of the steered wheels of the vehicle; the estimated steering authority and/or the actions of a user driving the vehicle are used to adjust the gain of the yaw rate control loop.
Abstract:
A method of steering a vehicle (28) along a predetermined or real time path by using a steering control algorithm (16). The vehicle (28) includes a navigation system (13) and a navigation antenna (12). The navigation antenna (12) is mounted on the vehicle (28) at an optimum antenna position, whereas the steering control algorithm (16) assumes a nominal antenna position at a predetermined reference point. The method comprises the following steps: (A) obtaining a set of positioning data of the vehicle (28) by using the navigation system (13) and by using the navigation antenna (12) mounted at the optimum antenna position; (B) modifying the set of positioning data of the vehicle (28); (C) measuring a steering angle(s) of the front wheels of the vehicle (28) relative to a predetermined reference direction(s); (D) calculating a correction(s) to the measured steering angle(s); and (E) performing a steering action by using the correction(s) to the measured steering angle(s) to move the vehicle along the predetermined or real time path.
Abstract:
An integrated guidance system is disclosed. The integrated guidance system includes a position determination system adapted for determining a current position. Additionally, the integrated guidance system further includes a lightbar device adapted for providing a visual representation of the deviation of the current position from a desired path to guide movement along the desired path. Furthermore, the integrated guidance system has a data input device, and a display device for displaying text and graphics. Moreover, the integrated guidance system includes a user interface system adapted for facilitating user interaction by integrating operation of the position determination system, the lightbar device, the data input device, and the display device.
Abstract:
A soil cultivating apparatus including a tractor (2) towing a row cultivator (4) by means of a three-point linkage (6). The row cultivator (4) includes a fixed portion (8) and a moveable portion (10) having soil scarifying tools (18a-18n). The movable portion (10) is laterally moveable relative to the fixed portion (8) by means of linkages (12a-12d) and is effected by a hydraulic actuator (22) under control of tool-bar control system (20) which is able to determine the position of the moveable portion (10) relative to the fixed portion (8) by means of a sensor (24). Mounted upon the moveable portion (10) is a DGPS antenna (26) GPS receiver that forms part of the control system (20). The control system (20) has a microprocessor which operatively executes a stored program. The microprocessor receives data from an intra-rig sensor and from the GPS receiver specifying the absolute coordinate of the movable portion (10) relative to the earth. On the basis of the data received and in accordance with the instructions in the program, the microprocessor generates a series of lateral motion commands which controls the hydraulic actuator (22). An operator of the system may enter coordinates defining a desired line of travel of the movable portion (10) by means of a data entry device. Command prompts and other feedback to the operator are displayed by means of a screen.
Abstract:
An improved mobile agricultural products crop input control system including a delay coordinating system (50) particularly adaptable for use in site-specific (precision) farming, wherein selected discrete delay information unique to each on-board crop input storage release point (62), crop input transport system (70), and/or crop input dispensing point (80) is combined with anticipated field reference point data obtained with a machine positioning system, e.g. "Dead Reckoning", GPS (52), and/or radar (54), and a computer (14), to direct independent functioning of selected on-board storage devices (304), material transport systems (70), crop input release point mechanisms (62), and/or dispensing point mechanisms (80) to ensure stored crop inputs are released for a timely combination to achieve a predetermined quantity and prescription of crop inputs delivered to the anticipated field reference point as the crop input applicator machine(s) travels over a predetermined geographic land area.
Abstract:
The invention concerns a method and device for automatically applying fertilizers, in particular fresh sewage sludge material or similar organic fertilizers, onto the ground, in particular onto areas used for agricultural purposes. The device comprises a vehicle for applying the fertilizer, means (13) for holding the fertilizers, means (6, 7) for discharging the fertilizers out of the means (13) and applying them to the ground, and means (5) for controlling the amount of fertilizer to be applied as a function of time or the speed of the vehicle. Means (2, 3) are used to determine the location and speed on the ground using satellite navigation (GPS) and a radar sensor (8) for determining the speed of the vehicle (1). The device further comprises means (9) for determining the vehicle's direction of travel in situations in which the satellite navigation system cannot provide corresponding values for reasons inherent in the system.
Abstract:
[Object] To provide a work setting system for a working vehicle to save labor in work setting. [Solution] The invention includes: a server that sends and receives information to and from a working vehicle V1, V2, V3; and a work setting means that sets work performed by the working vehicle V1, V2, V3; wherein the server stores work setting information respectively in association with a plurality of operators W1, W2, W3 operating the working vehicle V1, V2, V3; and the working vehicle V1, V2, V3 reads out work setting information associated with an operator that actually operates the working vehicle V1, V2, V3, and performs work according to the read work setting information, and therefore, labor is saved in work setting, and work is perform according to the read work setting information.
Abstract:
A method of controlling outdoor ground processing operations of two or more work vehicles (15, 260, 270, 280, 290, 300), involves running a computer model (100, 110, 120) of the operations using a number of candidate schedules of the ground processing operations using predicted conditions, the operations involving work vehicle movements and work vehicle processing tasks, at least one of the operations for one of the work vehicles being a dependent operation, being dependent on another (25) of the work vehicles. An overall schedule for the operations is generated and used to control actual execution of the ground processing operations by the work vehicles. The computer model is updated as changes in the conditions occur as monitored during the actual execution, and used to adapt the actual execution of a remaining part of the ground processing operations.
Abstract:
The present invention is related to a method for harvesting crops from a field and to a method for working a field by towing an apparatus such as a tilling apparatus, wherein the methods of the invention employ manned and unmanned vehicles. The operation and movement of the unmanned vehicles is controlled by the drivers of the manned vehicles which are continuously in the vicinity of the unmanned vehicles. The harvesting method involves at least the driver of a harvesting vehicle such as a combine harvester and the driver of a crop collecting vehicle such as a truck, wherein the drivers control the operation of one or more unmanned crop carts, operated to receive harvested crops from the harvesting vehicle during a harvesting phase and deliver harvested crop to the crop collecting vehicle during a subsequent delivery phase The control effected by the driver of the harvesting vehicle and the driver of the collecting vehicle is such that each driver is capable of visually inspecting the crop cart's operation during the totality of the harvesting and delivery phases respectively. The invention is equally related to a method for working an agricultural field wherein an agricultural apparatus, such as a tillage apparatus, is towed through the field, by one or more unmanned vehicles, while the operation of the unmanned vehicles is controlled by the operator of a manned vehicle that is moving along with the unmanned vehicles through the field.