Wing Spar Retention System for UAV Transport
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Solution Overview
Problem
The challenge lies in effectively storing and shipping unmanned aerial vehicles (UAVs) beyond their operational range, as they are sophisticated and often large, requiring an improved means for restraint and transportation that ensures safety and efficiency.
Innovation Solution
A system comprising a base with a post and locking mechanism, along with cradles and cushioning members, is used to securely restrain the wing spar of a UAV, allowing for secure storage and shipping by preventing movement and protecting the aircraft during transit.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the wing spar is restrained using a simple fixed post, then the structure is simple, but the wing spar cannot be securely held during transit
Solution Approach 1:
The post is made movable rather than fixed, allowing it to be positioned and locked at different locations along the base to accommodate different wing spar lengths and positions. The locking member secures the post at the desired position, transforming a static structure into a dynamic, adjustable one that provides both security and adaptability.
Solution Approach 2:
The restraint system is divided into separate functional components: a base, a movable post, a locking member, and a cushioning member. This segmentation allows each component to perform its specific function independently while working together as a complete restraint system, balancing complexity with effectiveness.
2Adaptability or versatility
If the post is made movable and lockable at different positions, then the adaptability to different wing sizes is improved, but the device complexity increases
Solution Approach 1:
The post transitions from a fixed to a movable component that can be positioned along the base and secured at various locations. This dynamic positioning capability allows the same restraint system to accommodate different wing spar lengths and configurations without requiring multiple specialized fixtures.
Solution Approach 2:
The base with its elongate structure serves multiple functions: it provides support, defines a pathway for the post, and offers multiple positioning points for accommodating different wing spar configurations. The locking member universally secures the post regardless of its position, creating a versatile restraint system.
3Reliability
If a locking member is added to secure the post, then the restraint security is improved, but the ease of operation decreases
Solution Approach 1:
The biasing member automatically exerts force on the locking member to maintain engagement with the post, providing self-locking functionality. Once the post is positioned, the locking mechanism secures itself without requiring additional fastening operations, reducing operational complexity while maintaining security.
Solution Approach 2:
The biasing member replaces complex multi-component locking mechanisms with a simpler spring-based system that provides automatic engagement and retention. This mechanical substitution simplifies the operation while ensuring reliable restraint through the biasing force that maintains locking member contact with the post.
4Reliability
If the stop diameter is made larger than the aperture, then the wing spar is securely held, but the cushioning requirement increases to prevent damage
Solution Approach 1:
The cushioning member is positioned between the stop and the wing spar aperture to provide protective cushioning before any potential contact or stress concentration occurs. This pre-positioned cushioning element prevents damage while maintaining the secure restraint function of the larger-diameter stop.
Solution Approach 2:
The cushioning member acts as an intermediary between the rigid stop structure and the fragile wing spar aperture. It mediates the interaction by providing a compliant interface that maintains the restraint function while eliminating the harmful rigid contact that could cause damage to the wing spar.
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 ensures the safe and efficient transportation of UAVs by preventing movement and minimizing damage during shipping, allowing for the secure reattachment of wings upon deployment, thus addressing the operational range limitations and handling complexities of these vehicles.
Implementation Method 1
The biasing member has a first diameter when the post is in the unlocked position and a second diameter in the locked position. The first diameter is smaller than the at least one aperture and the second diameter is bigger than the at least one aperture.
Data Source
AI summary
A retention system includes a base supporting a wing spar and a post extending through the base from a first side of the base to a second side of the base. The post inserts through an aperture in the spar. A stop is selectively securable to the post over the second side of the base. A locking member engages the post on the first side of the base. The locking member is configured to selectively move the post from an unlocked position to a locked position in which the post is withdrawn toward the first side relative to the unlocked position. A biasing member encircles the post and is positioned between the stop and the second side. When the locking member is in a closed position the biasing member expands to engage the aperture and resist movement of the wing spar. A plurality of cradles may support the wing.