Moving-Base UAV Control for Stable Takeoff and Accurate Landing
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Solution Overview
Problem
Conventional UAVs face difficulties in taking off, following, and landing on a moving base due to issues with position and velocity control, inability to adjust to a moving platform, and lack of automatic return and landing capabilities.
Innovation Solution
A UAV control method and system that includes takeoff, following, and landing processes, utilizing electromagnet mechanisms for stable takeoff, coordinated flight control for following, and infrared guidance for accurate landing, with a moving base station transmitting movement state data to the UAV for autonomous operation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional UAV control methods are used on a moving base, then the UAV can take off and land, but the takeoff attitude becomes too large and the UAV may roll over or slide off due to accumulated integral control values
Solution Approach 1:
The system performs preliminary actions by detecting the movement state of the base before takeoff and pre-calculating the compensation values for position and velocity loops. This allows the control system to anticipate and counteract the effects of base movement before they cause instability, preventing rollover and sliding issues during takeoff.
Solution Approach 2:
The invention implements a feedback mechanism where the movement state of the base is continuously detected and fed back to the control system. The control system then adjusts the UAV's position and velocity control in real-time based on this feedback, compensating for base movement effects and maintaining stable takeoff and landing operations.
2Measurement precision
If manual intervention is used for UAV to follow the moving base, then the UAV can achieve synchronous flight, but the operation complexity increases and real-time tracking is difficult
Solution Approach 1:
The UAV system performs self-service by automatically detecting the base's movement state and autonomously calculating the necessary position and velocity adjustments. The control system independently handles the tracking calculations and executes the synchronous flight without requiring manual intervention, simplifying operation while maintaining precise tracking.
Solution Approach 2:
The invention replaces manual mechanical control with an automated electronic control system. The control system uses computational algorithms to calculate position and velocity compensation based on base movement detection, substituting manual operator actions with automated electronic processing to achieve precise tracking with reduced complexity.
3Measurement precision
If conventional landing control is used, then the UAV can return to the takeoff spot, but it cannot automatically return to the moving base position and land accurately on the moving base
Solution Approach 1:
The system uses feedback from base position detection to continuously update the target landing position. The control system monitors the base's real-time location and automatically adjusts the UAV's navigation and landing approach to ensure accurate return and landing on the moving base, achieving both high precision and full automation.
Solution Approach 2:
The control system performs preliminary calculations of the return trajectory and landing approach based on the base's current position and movement state. By pre-planning the return path and preparing landing parameters in advance, the system enables automatic accurate landing on the moving base without manual intervention.
4Adaptability or versatility
If the UAV operates on a moving base with bumps and sways, then the UAV can adapt to the moving platform, but the integral control values accumulate and result in high acceleration values and large takeoff attitudes
Solution Approach 1:
The system continuously detects base movement state and feeds this information back to the control algorithm. The feedback mechanism allows the system to adapt to bumps and sways in real-time by adjusting control parameters dynamically, preventing integral value accumulation and maintaining flight stability while operating on the moving platform.
Solution Approach 2:
The control system implements dynamic adjustment of position and velocity loop parameters based on the detected base movement state. This dynamic adaptation allows the UAV to respond to changing platform conditions, maintaining stability during takeoff and flight even when the base experiences bumps and sways, without accumulating control errors.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
Enables stable takeoff, intelligent following, and accurate landing on a moving base, reducing operational difficulties and allowing autonomous operation on moving platforms like vehicles or ships.
Implementation Method 1
an electromagnet mechanism is installed on the landing gear of the UAV to control the electromagnet mechanism, so that the electromagnet mechanism generates magnetic force to attract an iron surface of a moving base platform
Implementation Method 2
an infrared sensor is installed on the onboard terminal of the UAV to detect a position of an infrared indicator
Data Source
AI summary
An unmanned aerial vehicle (UAV) control method includes a takeoff process, a following process and a landing process, wherein the takeoff process includes the following steps: unlocking the UAV, and detecting the current horizontal position of the UAV in the horizontal direction and the current altitude of the UAV in the vertical direction; determining whether the current horizontal position and the current altitude meet takeoff criteria, and controlling the UAV to bounce off and enter into a takeoff state if the determination result is positive. The system provided by the present disclosure employs the above-mentioned method to control a UAV. The method and system provided by the present disclosure meet three functional requirements for a UAV on a moving base platform, namely, stable takeoff, following process and accurate landing, thus decrease the difficulties in the use of a UAV on a moving platform.