FPV UAV Flight Control for Smooth Banked Turns and Speed Holding
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Solution Overview
Problem
FPV UAVs face difficulties in precise control, especially for unskilled users, due to the lack of speed feedback and inadequate control logic for banked turns, ascending, descending, and hovering, which can result in an unsmooth video feed and increased risk of damage.
Innovation Solution
The system provides a processor-based control method that allows FPV UAVs to accelerate or decelerate based on input parameters, automatically determines roll angles for banked turns, and includes safety protection by disabling the UAV if it exceeds a speed limit, enabling users to focus on flight experience with reduced manual control actions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If precise manual control is applied to achieve smooth flight path, then flight path smoothness is improved, but user focus is distracted from shooting video
Solution Approach 1:
The UAV performs self-control of flight parameters including automatic speed maintenance, banked turn execution, and attitude stabilization without continuous user input. The system monitors its own state and autonomously adjusts control surfaces to maintain smooth flight paths, allowing users to focus on video shooting while the UAV handles flight stability independently
Solution Approach 2:
The system automatically adjusts flight parameters such as speed, roll angle, and pitch angle based on predefined control logic. During banked turns, the system dynamically changes roll and pitch parameters to achieve smooth turning trajectories. Speed parameters are automatically regulated to maintain constant velocity during cruise phases, eliminating the need for manual parameter adjustments
2Ease of operation
If automatic speed control is implemented, then user control effort is reduced, but control logic complexity increases
Solution Approach 1:
The system continuously monitors flight speed through onboard sensors and compares actual speed against target speed values. Based on this feedback, the control system automatically adjusts throttle and pitch to maintain desired speed. This closed-loop feedback mechanism enables automatic speed control while keeping the control logic manageable through standardized control algorithms
Solution Approach 2:
The control system integrates multiple functions including speed control, attitude stabilization, and banked turn execution within a unified control framework. The same feedback control architecture is used across different flight phases (cruise, turning, climbing), reducing overall system complexity despite the multi-functional requirements
3Measurement precision
If manual control adjustments are made for banked turns, then turning precision is improved, but flight smoothness deteriorates
Solution Approach 1:
The system pre-calculates the required roll and pitch angles for banked turns based on the desired turn radius and speed. Before initiating a turn, the control system gradually applies the calculated roll angle to bank the UAV, then coordinates pitch adjustments to maintain smooth trajectory. This preliminary calculation and gradual execution approach ensures both turning precision and flight smoothness without abrupt manual adjustments
Data Source
AI summary
A method implemented by a processor associated with a movable object includes receiving a first parameter value from a user interface communicatively coupled to the movable object; determining a horizontal acceleration based on the first parameter value, wherein the horizontal acceleration is substantially zero when the first parameter value is zero; and controlling the movable object to accelerate or decelerate in accordance with the determined horizontal acceleration.