Multi-modal Vehicle Rotor Tilting Mechanism
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Solution Overview
Problem
Current hybrid aerial-terrestrial platforms are inefficient due to redundant actuation systems, increased weight, and complexity, which hinder scalability and result in suboptimal designs that consume excessive power and lack control authority during ground locomotion.
Innovation Solution
A multi-modal vehicle with a rotor that can pivot between aerial and ground modes using a tilting system and magnetic locking mechanism, allowing the same actuation system to provide propulsion for both modes, and a control system with a proportional-derivative feedback controller for efficient operation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If independent power actuators and propulsion systems are used for each mode of locomotion, then the vehicle can achieve both aerial and ground mobility, but the weight and complexity of the system increase significantly
Solution Approach 1:
The rotor is designed to perform dual functions: generating lift during aerial mode and providing ground propulsion during terrestrial mode. The same rotor structure and motor are used for both modes, eliminating the need for separate propulsion systems and significantly reducing vehicle weight while maintaining adaptability across both locomotion modes
Solution Approach 2:
The invention merges the aerial and ground propulsion functions into a single integrated rotor-motor system. By combining what would traditionally be separate systems into one unified component, the design achieves both modes of locomotion without the weight penalty of redundant actuators and propulsion mechanisms
2Adaptability or versatility
If independent power actuators and propulsion systems are used for each mode of locomotion, then the vehicle can achieve both aerial and ground mobility, but the device complexity increases
Solution Approach 1:
The rotor-motor assembly serves as a universal propulsion system for both aerial and ground modes, eliminating the need for separate actuation systems. This multi-functional design dramatically simplifies the overall device architecture while preserving the ability to perform both modes of locomotion
Solution Approach 2:
By merging the aerial and ground propulsion functions into a single rotor-motor system, the invention reduces device complexity. The unified system requires fewer components, control systems, and mechanical linkages compared to having independent propulsion systems for each mode
3Adaptability or versatility
If unpowered wheels with vectored thrust from propellers are used for ground movement, then the vehicle can achieve ground locomotion, but significantly more power is consumed and control authority is reduced
Solution Approach 1:
The invention replaces the inefficient mechanical arrangement of unpowered wheels with vectored propeller thrust with a direct powered rotor system. The powered rotor provides both aerial lift and ground propulsion through direct mechanical engagement, eliminating the need to waste battery power on inefficient vectored thrust for ground movement while maintaining full control authority
4Adaptability or versatility
If a fixed-wing design with actuated wings is used for ground crawling, then the vehicle can achieve terrestrial movement, but the vehicle cannot take-off and land vertically and crawling with wings is not an effective mode of terrestrial locomotion
Solution Approach 1:
The invention employs a dynamic rotor system that can pivot and adapt its configuration for different modes of operation. Unlike static fixed-wing designs, the powered rotor can dynamically transition between aerial and ground modes, enabling effective terrestrial locomotion through direct wheel-like contact while preserving vertical take-off and landing capabilities
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 agile and efficient transition between aerial and ground modes with reduced power consumption and improved control authority, enhancing mission endurance and versatility for military and civilian applications.
Implementation Method 1
a magnetic locking mechanism configured to lock the rotor in either the first position or the second position
Implementation Method 2
when the rotor is disposed in the first position, the rotor is configured to generate lift when actuated by the motor
Implementation Method 3
when the rotor is disposed in the second position, the rotor is configured to engage a surface to transport the vehicle when actuated by the motor
Data Source
AI summary
A multi-modal vehicle includes a frame, a rotor pivotally mounted to the frame, the rotor including a first position and a second position circumferentially spaced from the first position, and a motor coupled to the rotor and configured to rotate the rotor, wherein, when the rotor is disposed in the first position, the rotor is configured to generate lift when actuated by the motor, wherein, when the rotor is disposed in the second position, the rotor is configured to engage a surface to transport the vehicle when actuated by the motor.