UAV Gimbal Attitude Control Using Predicted Flight Trajectory
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Solution Overview
Problem
Current gimbal control systems for UAVs lack the ability to automatically adjust their attitude based on the aircraft's flight trajectory, leading to suboptimal user experience in aerial photography and other applications.
Innovation Solution
A gimbal servo control method and device that predicts the aircraft's flight trajectory within a preset time period and adjusts the gimbal's attitude according to the predicted velocity direction, allowing the gimbal to automatically align with the flight path and capture images in a more realistic and controlled manner.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Extent of automation
If the gimbal attitude is manually controlled or controlled based on current velocity, then the control system is simple and responsive, but the gimbal cannot automatically align with the flight trajectory, reducing aerial photography quality and user experience
Solution Approach 1:
The system performs preliminary calculation of the flight trajectory and predicts future velocity direction before the aircraft actually reaches that state. By pre-computing the desired gimbal attitude based on predicted flight path, the system enables automatic alignment without requiring complex real-time feedback loops, thus increasing automation while controlling complexity
Solution Approach 2:
The patent introduces an intermediate computational layer that translates flight trajectory data into desired gimbal attitudes. This intermediary processing step decouples the complexity of trajectory prediction from the gimbal control execution, allowing the system to achieve high automation while managing overall system complexity through modular architecture
2Measurement precision
If the gimbal attitude is adjusted based on current velocity direction, then the response is immediate and simple, but there is a time delay in aligning with the actual flight trajectory, reducing imaging accuracy
Solution Approach 1:
The system calculates the desired gimbal attitude in advance based on predicted flight trajectory rather than waiting for current velocity measurements. This preliminary action eliminates the time delay inherent in reactive control systems, as the gimbal is already positioned correctly when the aircraft reaches the predicted state, thereby improving alignment precision without sacrificing response time
Solution Approach 2:
The patent implements dynamic prediction of flight trajectory by continuously updating the desired gimbal attitude based on changing flight conditions. This dynamic approach allows the system to adapt to real-time variations in aircraft motion while maintaining precise alignment, effectively compensating for time delays through predictive rather than reactive control
Data Source
AI summary
A gimbal servo control method includes obtaining a predicted flight trajectory of an aircraft within a preset time period from a current time, and adjusting an attitude of a gimbal carried by the aircraft according a predicted velocity direction of the aircraft at a point of the predicted flight trajectory.