Solar Flapping-Wing UAV With Capacitor Power for Long Endurance
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Solution Overview
Problem
Traditional drones face limitations in flight endurance due to battery constraints, requiring frequent recharging or replacement, and are often unstable during transitions, costly, and need specialized training and landing spaces.
Innovation Solution
A battery-free unmanned aerial vehicle (UAV) powered by solar energy harvesting, utilizing a four-bar linkage mechanism and flapping wings actuated by a BLDC motor, with energy stored in super-capacitors, enabling extended flight times and stable operation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Duration of action of moving object
If LiPo batteries are used to power traditional drones, then the drones can achieve short-term flight, but the battery capacity reduces significantly after a few weeks due to high current discharges
Solution Approach 1:
The patent removes the battery component entirely from the UAV system, extracting the energy storage function and replacing it with direct solar panel to motor conversion. This eliminates the reliability issue of battery degradation while maintaining flight capability through continuous solar energy harvesting.
Solution Approach 2:
The UAV achieves self-sustaining operation by directly converting solar energy to mechanical energy through the solar panels and brushless DC motor, without requiring external recharging or battery replacement. The system serves itself by continuously harvesting energy from sunlight during flight operations.
2Duration of action of moving object
If vertical take-off and landing (VTOL) drones are used to support long-endurance flight, then hovering capability is achieved, but the drones become expensive, difficult to control, and require special pilot training
Solution Approach 1:
The patent employs a simple fixed-wing design with basic control mechanisms instead of complex VTOL systems, resulting in a more affordable and easier-to-operate aircraft. While individual units may have limited operational lifespan without maintenance, the simplicity reduces training requirements and operational complexity.
Solution Approach 2:
Instead of using complex vertical take-off mechanisms that require specialized training, the patent inverts the approach by using simple horizontal fixed-wing flight with automated or basic manual control, making the system more accessible while achieving long-endurance flight through efficient aerodynamic design.
3Duration of action of moving object
If VTOL drones transition from vertical take-off to flying, then long-endurance flight is achieved, but the procedure of changing propeller directions is complex and poses potential failures
Solution Approach 1:
The patent removes the complex propeller direction-changing mechanism entirely by eliminating the VTOL capability. The system achieves flight endurance through efficient fixed-wing aerodynamics and direct solar power conversion, avoiding the reliability issues associated with mechanical reconfiguration during flight transitions.
Solution Approach 2:
The patent replaces complex mechanical reconfiguration systems with a simpler aerodynamic design that maintains constant wing orientation. Flight endurance is achieved through sustained solar energy conversion and efficient gliding or powered flight without requiring mechanical changes to the propulsion system during operation.
4Duration of action of moving object
If larger batteries are used to extend flight time, then the UAV can achieve longer flight duration, but the weight increases which further reduces flight time
Solution Approach 1:
The patent removes the battery weight from the system entirely by eliminating the energy storage component. Flight time is extended not by adding weight but by directly converting solar energy to propulsion, creating a weightless energy source that continuously powers the UAV during flight.
Solution Approach 2:
The UAV achieves extended flight duration through self-sustaining solar energy conversion, where the solar panels continuously harvest energy from sunlight during flight. This eliminates the need for heavy batteries while maintaining or extending flight time through direct energy conversion from the environment.
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
The UAV achieves long-term flight without maintenance, stable hovering, and reduced ecological impact, opening up applications like wildfire monitoring and smart agriculture with ultra-long missions.
Implementation Method 1
A plurality of solar panels is in electrical communication with the capacitor, which is configured to harvest non-battery energy from the plurality of solar panels
Data Source
AI summary
Unmanned aerial vehicles are provided. In one aspect, the unmanned aerial vehicle includes a four-bar linkage mechanism in mechanical communication with a pair of wings. An electrical subsystem includes an actuator in mechanical communication with the four-bar-linkage mechanism. The actuator is in electrical communication with a capacitor. A plurality of solar panels is in electrical communication with the capacitor, which is configured to harvest non-battery energy from the plurality of solar panels to power the actuator for controlling the four-bar linkage mechanism to operate the pair of wings.