Distributed Power Modules for Coaxial Rotor Stability
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Solution Overview
Problem
Existing unmanned rotary wing vehicles face challenges in achieving balanced in-flight control authority and stability due to the placement of heavy power sources, which can reduce control authority while increasing stability, leading to inefficiencies in directional flight and hovering operations.
Innovation Solution
A rotary wing vehicle design featuring a non-rotating structural spine with a counter-rotating coaxial rotor system, distributed power sources, and modular components, where power transmission is electrical through conduits and signal conduits, allowing for even weight distribution and improved control authority by positioning power modules to coincide with the center of lift.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If heavy power sources are placed in traditional locations, then stability is increased, but control authority is reduced
Solution Approach 1:
The power system is divided into multiple distributed power sources positioned at different locations along the vehicle body rather than concentrating weight in one location. This segmentation allows independent positioning of each power source to optimize both stability and control authority separately.
Solution Approach 2:
The problem is solved by transitioning from traditional vertical weight distribution to a three-dimensional distributed arrangement of power sources along the longitudinal axis of the vehicle, allowing optimization in multiple spatial dimensions simultaneously.
2Reliability
If mechanical shafting is used for power transmission, then reliable power delivery is achieved, but mechanical complexity and noise increase
Solution Approach 1:
Mechanical shafting and gear systems are replaced with electrical power transmission through wiring harnesses and electromagnetic motors. This substitution eliminates complex mechanical components, reduces moving parts, and decreases noise while maintaining reliable power delivery to the rotor systems.
3Device complexity
If centralized power sources are used, then simplified power distribution is achieved, but control authority and maneuverability are reduced
Solution Approach 1:
The centralized power system is segmented into multiple independent power sources distributed along the vehicle. Each power source can be independently controlled, enabling differential power delivery to different rotor systems for enhanced maneuverability and control authority while maintaining manageable system complexity.
Solution Approach 2:
The power distribution system transitions from static centralized delivery to dynamic distributed control, where power allocation to each rotor can be independently adjusted in real-time based on flight conditions and control requirements.
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
This design enhances in-flight control authority and stability by balancing weight distribution, enabling efficient directional flight and hovering operations with reduced mechanical complexity and noise, while maintaining proportional balance and control.
Implementation Method 1
a rotor module including a rotor hub and a plurality of rotor blades connected to the hub... drive the rotor blades about a longitudinal axis of rotation
Data Source
AI summary
A rotary wing vehicle includes a body structure having an elongated tubular backbone or core and a counter-rotating coaxial rotor system having rotors. The rotor system is used to move the rotary wing vehicle in directional flight.