Abstract:
Drivable path plans systems, apparatus, and methods for autonomous vehicles disclosed herein may receive original path plan data and create a drivable path plan for the autonomous vehicle between a first path element and a second path element using a clothoid spline. An initial connection point may be identified, as well as an initial heading and an initial curvature along the first path element, and a final connection point, a final heading, and a final curvature along the second path element. The clothoid spline may be inserted between the initial connection point along the first path element and the final connection point along the second path element. A path controller may guide the vehicle along the drivable clothoid spline path using a curvature rate output signal to control a steering system of the autonomous vehicle.
Abstract:
An agricultural vehicle (10) includes at least one geospatial sensor (44) for locating the vehicle (10) within a geographic area (14); at least one event trigger; at least one actuator for actuating a component onboard the vehicle (10); and a headland management system (HMS) (30) for carrying out a headland turn sequence (HTS) at a predetermined location within the geographic area (14). The HMS (30) includes a memory (34) for storing at least a portion of an HTS, and a visual display (46) for displaying at least a portion of an HTS. The HMS (30) is configured to display a real-time map on the visual display (46), including a position of the vehicle (10) on the map, and at least one future HTS event forming at least part of an HTS. The HMS (30) is configured to allow an operator to modify at least one HTS event on the real-time map.
Abstract:
A robotic work tool system, comprising a robotic work tool, said robotic work tool comprising a position determining device for determining a current position and at least one deduced reckoning (also known as dead reckoning) navigation sensor, the robotic work tool being configured to determine that a reliable and accurate current position is possible to determine and in response thereto determine an expected navigation parameter, compare the expected navigation parameter to a current navigation parameter to determine a navigation error, determine if the navigation error is negligible, and if the navigation error is not negligible, cause the robotic work tool to change its trajectory to accommodate for the navigation error. Wherein the robotic work tool (100) is further configured to change the trajectory by aligning the trajectory with an expected trajectory, wherein the expected trajectory is determined as an expected direction originating from an expected position and wherein the robotic work tool (100) is configured to change the trajectory by returning to a position that should have been visited and aligning the trajectory with the expected direction originating from the expected position, said position that should have been visited being aligned with the expected direction originating from the expected position.
Abstract:
Systems and techniques for refined row guidance parameterization with Hough transform are described herein. An electronic representation of a field (ERF) can be received. A steering variable calculation can be performed by executing a cascaded Hough transform on the ERF. An intermediate value used in calculating the steering variable can be selected. A refined intermediate value can be identified from the intermediate value by measuring a difference between the intermediate value and an anchor value. The steering variable calculation can be adjusted using the refined intermediate value