Two-Wheeled Robotic Vehicle Payload Layout for Stability
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Solution Overview
Problem
Two-wheeled robotic vehicles face stability challenges due to the absence of a third wheel, which affects their static and dynamic stability, and there is a need for a design that enhances stability while allowing flexibility in payload options.
Innovation Solution
A two-wheeled robotic vehicle design with a payload disposed between the wheels, where the payload is centered around the axis passing through the wheel centers, improving stability and enabling various applications like irrigation and firefighting, with options for a water reservoir or hose reel that can be retrofitted or rotate with the wheels.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a two-wheeled robotic vehicle is designed without a third wheel to maintain simplicity and maneuverability, then the vehicle structure remains compact and easy to operate, but the vehicle suffers from poor static and dynamic stability
Solution Approach 1:
The patent applies the counterweight principle by positioning a payload between the two wheels to create a stabilizing effect. The payload acts as a counterbalancing element that lowers the center of gravity and provides rotational inertia, thereby improving both static and dynamic stability without adding a third wheel, thus maintaining the vehicle's simplicity and maneuverability
2Stability of the object's composition
If a payload is added between the wheels to improve stability, then the vehicle becomes more stable, but the vehicle structure and complexity increase
Solution Approach 1:
The patent applies the multi-functionality principle by designing the payload to serve multiple purposes: it improves stability through its positioning between the wheels, provides operational functionality for irrigation/firefighting/cleaning tasks, and can be configured in various forms (water reservoir, hose reel, storage container). This approach adds stability without significantly increasing structural complexity, as the payload integrates multiple functions into a single component
3Stability of the object's composition
If the payload is positioned between the wheels to lower the center of gravity, then stability improves, but the space available for payload placement is limited
Solution Approach 1:
The patent applies the dimensionality change principle by utilizing the vertical space between the wheels rather than horizontal extension. The payload is positioned in the vertical dimension between the wheel axes, lowering the center of gravity while maintaining a compact footprint. This allows for adequate payload volume without increasing the vehicle's overall width or length, thus resolving the contradiction between stability improvement and space constraints
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 design enhances stability by lowering the center of gravity and allows flexibility in payload choice, enabling efficient operation and versatile applications with improved maneuverability.
Implementation Method 1
the payload may inherently improve the stability of the robotic vehicle... the payload with added weight of the water may serve to improve the stability of the robotic vehicle... the hose reel may also serve to inherently improve the stability of the robotic vehicle by virtue of lowered center of gravity
Data Source
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AI summary
A robotic vehicle (100) for irrigation of a ground surface (G) such that the robotic vehicle (100) includes a pair of wheels (120A, 120B) adapted to propel the robotic vehicle (100) on the ground surface (G). The pair of wheels (120A, 120B) includes a first wheel (120A) and a second wheel (120B). At least one nozzle (130) is adapted to spray a liquid. Further, a payload (140) is disposed between the first wheel (120A) and the second wheel (120B). The robotic vehicle (100) is characterized in that the pay load (140) is defined around an axis (Y-Y') passing through a center (C1) of the first wheel (120A) and a center (C2) of the second wheel (120B).