Tandem High-Altitude Balloons for Precise Lift and Ballast Control
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Solution Overview
Problem
Existing lighter-than-air (LTA) systems face challenges in achieving high altitude flight stability and control, particularly above 50,000 feet, due to limitations in lift and ballast management, leading to issues like deformation and inefficient altitude adjustment.
Innovation Solution
The use of a tandem balloon system comprising a zero-pressure balloon (ZPB) and a variable air super-pressure balloon (SPB) with multiple chambers, where the ZPB provides lift and the SPB manages ballast by pumping or expelling ambient air, along with a compressor to regulate air flow, enabling precise altitude control and maneuverability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a single balloon system is used for high altitude flight, then the system structure is simple, but altitude control precision and stability deteriorate
Solution Approach 1:
The balloon system is divided into two independent balloons: a zero-pressure balloon (ZPB) for providing lift and a super-pressure balloon (SPB) for altitude control. Each balloon performs its dedicated function independently, with the ZPB maintaining structural simplicity while the SPB enables precise altitude management through its pressurized design and ballast system.
2Ease of operation
If a zero-pressure balloon is used alone, then the system is easy to operate, but altitude adjustment efficiency deteriorates
Solution Approach 1:
The system separates the lift generation function (ZPB) from the altitude control function (SPB). The SPB incorporates a compressor and ballast system that can rapidly pump air in or out to adjust altitude, providing efficient altitude adjustment while the ZPB continues to provide stable lift without complex control mechanisms.
3Reliability
If a super-pressure balloon with ballast system is used, then altitude control capability is improved, but system complexity increases
Solution Approach 1:
The complex ballast system (compressor, air intake, air release mechanisms) is isolated to the SPB, while the ZPB remains a simple lift-providing structure. This segmentation allows the SPB to handle all altitude control operations with full capability, while the overall system maintains operational simplicity through clear functional division.
4Quantity of substance
If balloon volume is increased to provide more lift, then lifting capacity is improved, but structural stability deteriorates
Solution Approach 1:
The total lifting capacity is divided between two balloons with different design optimizations. The ZPB is designed with large volume for maximum lift efficiency and structural stability at its operating pressure, while the SPB, though smaller, provides the ballast control function. Together they achieve the required lifting capacity while each maintains its own structural stability in its optimized design regime.
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 configuration allows for rapid descent and ascent rates, structural stability, and efficient altitude management, enabling advanced flight performance and maneuverability at high altitudes, with scalable designs for various missions.
Implementation Method 1
The ZPB is configured to receive therein a first mass of lighter-than-air (LTA) gas to provide a first upward lifting force to the balloon system
Implementation Method 2
The SPB comprises a first interior volume configured to receive therein a second mass of lighter-than-air (LTA) gas to provide a second upward lifting force to the balloon system
Implementation Method 3
The first valve when opened allows for release of at least a portion of the second mass of LTA gas from the SPB through the first valve to a surrounding atmosphere to decrease the second upward lifting force
Implementation Method 4
The SPB is further configured, after release of the at least a portion of the second mass of LTA gas from the SPB, to receive therein a variable amount of ambient air from a surrounding atmosphere to provide a variable downward force to the balloon system
Data Source
AI summary
Described herein are features for a high altitude lighter-than-air (LTA) system and associated methods. The LTA may include one or more super-pressure balloons (SPB). One or more of the SPB's may include one or more interior volumes. One or more of the interior volumes may be configured to receive an LTA gas therein to supplement the free lift of the LTA system. There may be an adjustable valve or vent to release the LTA gas. One or more of the interior volumes may be configured to receive ambient air to provide a variable downward force. The SPB may use a compressor to pump in ambient air. The compressor or another valve may release ambient air to decrease the downward force. A zero-pressure balloon (ZPB) may be attached with the one or more SPB's. The ZPB may supplement lift for the system.