System and method for autonomous navigation of a tracked or skid-steer vehicle
First Claim
1. An autonomous navigation system for a tracked or skid-steer vehicle comprising:
- a path planner that computes a series of waypoint locations specifying a path to follow;
a vehicle location sensor;
a tramming controller including a waypoint controller that computes vehicle speed and yaw rate setpoints based on vehicle location information from the vehicle location sensor and the locations of a plurality of neighbouring waypoints, and a rate controller that generates left and right track speed setpoints from the speed and yaw rate setpoints; and
a vehicle control interface that actuates vehicle controls in accordance with the left and right track speed setpoints.
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Accused Products
Abstract
An autonomous navigation system for a tracked or skid-steer vehicle is described. The system includes a path planner (54) that computes a series of waypoint locations specifying a path to follow and vehicle location sensors (82). A tramming controller (60) includes a waypoint controller (62) that computes vehicle speed and yaw rate setpoints based on vehicle location information from the vehicle location sensor and the locations of a plurality of neighboring waypoints, and a rate controller (64) that generates left and right track speed setpoints from the speed and yaw rate setpoints. A vehicle control interface actuates the vehicle controls in accordance with the left and right track speed setpoints.
21 Citations
33 Claims
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1. An autonomous navigation system for a tracked or skid-steer vehicle comprising:
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a path planner that computes a series of waypoint locations specifying a path to follow; a vehicle location sensor; a tramming controller including a waypoint controller that computes vehicle speed and yaw rate setpoints based on vehicle location information from the vehicle location sensor and the locations of a plurality of neighbouring waypoints, and a rate controller that generates left and right track speed setpoints from the speed and yaw rate setpoints; and a vehicle control interface that actuates vehicle controls in accordance with the left and right track speed setpoints. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
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15. A method for autonomous navigation of a tracked or skid-steer vehicle, comprising:
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determining by a processor a path plan including a series of computed waypoint locations specifying a path to follow; measuring the vehicle location and velocity; computing by the processor vehicle speed and yaw rate setpoints based on the measured vehicle location and velocity and the locations of a plurality of neighbouring waypoints; generating left and right track speed setpoints from the speed and yaw rate setpoints; and controlling the vehicle left and right tracks in accordance with the left and right track speed setpoints. - View Dependent Claims (16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28)
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29. A path planning system for autonomous vehicle having actuators for moving and steering the vehicle, the system comprising:
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a path planner that receives a series of desired locations and generates path data defining a feasible path for the vehicle to traverse the series of locations; sensors that monitor a location and heading of the vehicle; a controller that receives the path data and the monitored location and heading of vehicle and determines setpoints for the actuators such that the vehicle follows the path. - View Dependent Claims (30, 31, 32)
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33. A method for planning a path for an autonomous vehicle having defined constraints, the method comprising:
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receiving by a processor a starting location and an end location; generating by the processor a path that connects the starting and the end locations; if the path does not satisfy the defined constraints, applying a state lattice search in which a search space is expanded using a set of primitive expansion paths to a plurality of nodes defining nearby reachable vehicle configurations.
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Specification