Rotational Coupling for Suspended Load Position and Rotation Control
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Solution Overview
Problem
Existing systems for controlling suspended loads during transportation by carriers like helicopters or cranes are inadequate, particularly for flying carriers, as they cannot provide horizontal thrust and are prone to damage, and can cause unstable motion leading to safety hazards and operational delays.
Innovation Solution
A suspended load control system (SLCS) mounted on a hook or block, using thrusters, fans, or flywheels to output force vectors that counteract yaw and pendular motion, allowing independent control of load position and rotation, while avoiding torque on the main load-bearing line.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a hook or block is used to suspend the load, then the load can be securely supported with simple structure, but the load cannot be controlled for position and rotation
Solution Approach 1:
The patent combines the hook (for load support) with a control system comprising thrusters, fans, or flywheels (for load control) into an integrated assembly. This merging allows the system to simultaneously provide secure load support and active control of position and rotation, resolving the contradiction between simple structure and control capability.
Solution Approach 2:
The control system assembly is designed to perform multiple functions: supporting the load via the hook, generating control forces through thrusters/fans, and providing rotational control through flywheels or gyroscopes. This multi-functionality eliminates the need for separate control equipment while maintaining operational simplicity.
2Ease of operation
If control equipment (fans, thrusters) is used to control load position, then load control capability is improved, but the equipment becomes more subject to damage and failure
Solution Approach 1:
The control system is integrated with the hook and block assembly, which provide structural protection and shielding for the sensitive control components (thrusters, fans, flywheels). This integration beforehand cushions the equipment from environmental damage and reduces failure risk while maintaining control capability.
Solution Approach 2:
The hook and block structure serve as intermediaries that protect the control equipment from direct exposure to harsh environments (wind, weather, physical impact). The control system operates from within the protected assembly, reducing damage susceptibility while maintaining operational effectiveness.
3Reliability
If a rotational coupling is introduced to allow rotation without torque on the cable, then cable damage is prevented, but the system complexity increases
Solution Approach 1:
The rotational coupling acts as an intermediary component between the control system and the load-bearing cable. It allows the control assembly to rotate freely relative to the cable, preventing torque transmission that could damage the cable or cause improper winding, while adding minimal structural complexity to the overall system.
4Ease of operation
If existing load control systems are used below platform-based carriers, then some control capability is provided, but they cannot output horizontal thrust and are unsuitable for flying carriers
Solution Approach 1:
The control system is designed with universal adaptability to work with both platform-based carriers (cranes) and flying carriers (helicopters, airplanes). The integration of thrusters for horizontal thrust, fans for vertical control, and flywheels for rotational control creates a versatile system that can operate effectively across different carrier types and environmental conditions.
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 SLCS enhances safety and performance by stabilizing loads, reducing damage, and enabling faster operations, compatible with various carrier types without imparting significant torque on the main load-bearing line.
Implementation Method 1
the rotational coupling may not transfer a main lifting force between the carrier and the load and may transfer a torque from the load control system to the load
Data Source
AI summary
Disclosed are systems, apparatuses, and methods for a suspended load control system which controls tension on a winch control line in order to decrease latency between movement or rotation of the load control system and the load and reduce a reaction time between movement or rotation of the load control system and the load.