Multifunctional Balloon Membrane with Active Material
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Solution Overview
Problem
High-altitude balloons carrying payloads for communication and network services face challenges due to increasing payload weight, leading to larger balloon sizes and higher launch costs, while regulatory restrictions limit the weight and density of payloads, restricting operational flexibility, especially in adverse weather conditions.
Innovation Solution
Incorporating a flexible membrane with an active material that can controllably change its surface area in response to electrical stimuli, allowing for adjustable buoyancy and payload integration within the balloon membrane, such as using graphene sheets on a pre-stretched elastomer substrate to manage altitude and density.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If the balloon size is increased to carry heavier payloads for communication services, then the payload capacity is improved, but the launch cost increases
Solution Approach 1:
The balloon membrane is designed to perform multiple functions: it provides structural containment, acts as an antenna for communication services, and incorporates active materials for altitude control. This multi-functionality eliminates the need for separate dedicated payload components, effectively increasing payload capacity without proportionally increasing balloon size or launch cost.
Solution Approach 2:
The patent combines the antenna function with the balloon membrane itself rather than using separate antenna components. Conductive materials are integrated into the membrane structure, merging the communication function with the structural function, thereby reducing overall system weight and cost while maintaining payload capacity.
2Adaptability or versatility
If the payload weight is increased to provide more communication equipment, then the communication service capability is improved, but the balloon size must increase leading to higher launch cost
Solution Approach 1:
The balloon membrane serves as both a structural component and an active communication antenna, while also incorporating altitude control functionality. This multi-functionality allows communication equipment to be integrated directly into the membrane structure rather than requiring separate payload components, enabling enhanced communication capability without proportional increases in balloon size.
Solution Approach 2:
The membrane uses composite materials combining flexible substrate with conductive active materials. This composite structure provides both mechanical integrity and electromagnetic functionality, allowing communication services to be provided through the membrane itself rather than requiring additional dedicated communication hardware that would increase payload weight and balloon size.
3Reliability
If government regulations limit payload weight, then aviation compliance is improved, but the operational flexibility in adverse weather conditions deteriorates
Solution Approach 1:
The balloon incorporates active materials that can dynamically change the membrane surface area in response to electrical stimuli. This dynamic capability allows the balloon to adjust its buoyancy and altitude in real-time, providing operational flexibility to handle adverse weather conditions while maintaining compliance with aviation regulations through controlled payload weight.
Solution Approach 2:
The patent changes the physical parameters of the balloon system by incorporating materials that can alter their properties (surface area, volume) in response to electrical signals. This allows the balloon to adapt its buoyancy characteristics dynamically, maintaining regulatory compliance while achieving operational flexibility for adverse weather operations through parameter adjustment rather than payload weight increase.
4Ease of operation
If active material is added to the membrane to enable controllable surface area change, then the buoyancy control capability is improved, but the device complexity increases
Solution Approach 1:
The active materials are integrated directly into the balloon membrane structure rather than being separate components. This merging of the control functionality with the structural membrane simplifies the overall system architecture, providing buoyancy control capability without proportionally increasing device complexity.
Solution Approach 2:
The active materials serve multiple functions: they provide structural integrity as part of the membrane, enable electrical conductivity for communication, and provide controllable surface area change for buoyancy regulation. This multi-functionality reduces the need for separate dedicated components, improving ease of operation while limiting increases in device complexity.
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 solution reduces payload weight and size, ensuring compliance with aviation regulations, enabling more efficient and flexible operations while maintaining or enhancing the balloon's buoyancy and communication capabilities.
Implementation Method 1
an active material disposed on at least a portion of the flexible substrate, wherein the active material is configured to controllably change the surface area of at least a portion of the flexible substrate when an electrical stimulus is applied to the active material
Implementation Method 2
a membrane comprised of a flexible substrate
Data Source
AI summary
Disclosed herein is a lighter-than-air (LTA) device and method of making the same. In an embodiment, the LTA device may include a membrane having a flexible substrate and an active material disposed thereon, wherein the active material is configured to controllably change the surface area of at least a portion of the substrate when an electrical stimulus is applied to the active material.