3D Dubins Trajectory Planning for UAV Heading Alignment
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Solution Overview
Problem
Current methods for planning flight paths for unmanned aerial vehicles (UAVs) are inadequate as they fail to ensure the aircraft's heading aligns with the next waypoint, necessitating a more accurate three-dimensional trajectory planning method.
Innovation Solution
A three-dimensional trajectory planning method that determines a horizontal Dubins path and a vertical Dubins path based on the starting and target points' position and heading information, combining these paths to create a precise three-dimensional driving trajectory.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If traditional side offset tracking or L1 guidance methods are used to track two adjacent waypoints, then the flight path can be planned between waypoints, but the aircraft's heading cannot be guaranteed to meet the requirements to reach the next waypoint
Solution Approach 1:
The three-dimensional trajectory planning is segmented into two independent components: horizontal Dubins path planning and vertical Dubins path planning. The horizontal component handles position and heading information in the XY plane, while the vertical component handles height information. This segmentation allows each component to be optimized independently for accuracy without excessive complexity.
Solution Approach 2:
The method transitions from traditional two-dimensional waypoint tracking to three-dimensional trajectory planning by incorporating vertical height information alongside horizontal position and heading. This dimensional expansion enables precise control of the aircraft's three-dimensional trajectory, ensuring both horizontal alignment and vertical accuracy.
2Reliability
If three-dimensional trajectory planning is implemented to ensure heading alignment with target, then navigation accuracy is enhanced, but computational complexity increases
Solution Approach 1:
The planning system is divided into separate horizontal and vertical Dubins path determination modules. Each module independently processes its respective dimension using established Dubins path algorithms, ensuring reliable heading alignment through proven mathematical methods while keeping individual module complexity manageable.
Solution Approach 2:
The Dubins path algorithm serves as a universal solution for both horizontal and vertical trajectory planning. By applying the same mathematical framework to both dimensions, the system achieves reliable heading alignment without developing separate complex algorithms for each dimension.
Data Source
AI summary
A three-dimensional trajectory planning apparatus and a storage medium including a horizontal Dubins path determination module, a vertical Dubins path determination module, and a three-dimensional driving trajectory determination module. The horizontal Dubins path determination module determines a horizontal Dubins path from a starting point to the target point based on a driving mode, horizontal position information and heading information of a starting point, and horizontal position information and heading information of a target point. The vertical Dubins path determination module determines a vertical Dubins path from the starting point to the target point based on a height information of the starting point and a height information of the target point. The three-dimensional driving trajectory determination module determines a three-dimensional driving trajectory from the starting point to the target point based on a horizontal Dubins path and a vertical Dubins path.