Cable-Driven Telescopic Boom for Reliable Low-Pretension Deployment
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Solution Overview
Problem
Conventional deployable booms are complex, prone to failure, and difficult to deploy and maintain, lacking simplicity and ease of operation.
Innovation Solution
A cable-driven telescopic boom system with nested segments and continuous tension cables that deploy and retract smoothly, eliminating the need for significant pretensioning and ensuring tight nesting and reliable operation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional deployable booms use lead screw or hydraulic mechanisms, then the boom can be deployed, but the device complexity increases and reliability decreases
Solution Approach 1:
The patent extracts and eliminates complex lead screw and hydraulic mechanisms from the boom deployment system, replacing them with a simple cable-driven mechanism. This removal of unnecessary complexity directly improves reliability while reducing the number of potential failure points in the deployment mechanism.
Solution Approach 2:
The patent replaces complex mechanical systems (lead screws, hydraulics) with a simpler cable-driven mechanical system. The cable mechanism uses basic mechanical advantage through pulleys and tension cables, eliminating the need for complex actuation systems while maintaining effective boom deployment capability.
2Ease of operation
If conventional deployable booms use complex mechanisms, then deployment is possible, but ease of operation and ease of maintenance deteriorate
Solution Approach 1:
The patent removes complex deployment mechanisms from the boom structure, extracting only the essential cable-driven elements needed for operation. This simplification makes the system easier to operate while reducing maintenance requirements by eliminating complex mechanical components.
Solution Approach 2:
The cable-driven mechanism is designed to be inherently simple and self-explanatory in its operation. The system uses basic mechanical principles that are intuitive to operate and maintain, requiring minimal training and expertise while improving ease of operation and maintenance.
3Object-generated harmful factors
If the cable-driven system is significantly pretensioned, then the boom can be controlled, but self-deploying behavior upon release increases
Solution Approach 1:
The patent applies preliminary anti-action by designing the cable-driven system with minimal pretension that specifically counteracts unwanted self-deploying behavior. The cable tension is calibrated to prevent automatic deployment upon restraint release while maintaining sufficient control authority during operation.
Solution Approach 2:
The patent optimizes the cable pretension parameter to achieve the desired balance. By carefully adjusting the pretension force parameter, the system eliminates harmful self-deploying behavior while maintaining adequate control capability throughout the boom's range of motion.
4Volume of moving object
If boom segments are tightly nested, then the stowed configuration is compact, but manufacturing precision requirements increase
Solution Approach 1:
The patent employs asymmetric cross-sectional geometries in the boom segments that enable tight nesting while accommodating manufacturing tolerances. The non-circular cross-sections are designed to interlock or nest efficiently, achieving compact stowed volume without requiring extremely tight manufacturing precision.
Solution Approach 2:
The patent implements a nested doll configuration where boom segments are telescopically nested within each other in the stowed position. This nesting arrangement minimizes the overall stowed volume while the segment geometries are designed to tolerate normal manufacturing variations.
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 cable-driven telescopic boom provides a simple, reliable, and maintainable deployment mechanism with reduced self-deploying behavior, enhancing operational efficiency and durability.
Implementation Method 1
the drive mechanism including a cable and a motor that can apply tension to the cable
Implementation Method 2
the drive mechanism can be actuated to apply tension to the cable to move the telescopic boom from its stowed configuration to its deployed configuration
Data Source
AI summary
A cable-driven telescopic boom with several boom segments repositionable between stowed positions and deployed positions. The boom includes multiple spaced apart and separate cables that engage pulleys connected to each boom segment. A drive system can be used to apply tension to the cables to reconfigure the boom from a stowed configuration to a deployed configuration.