Control Moment Gyroscope Hoist Stabilization Without Tag-Lines
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Solution Overview
Problem
Existing methods for stabilizing hoisted objects, such as helicopters and cranes, are inadequate as they require ground personnel, are prone to mechanical failure, or are inefficient in generating torque, especially in challenging environments like 'hot zones' or over water.
Innovation Solution
The use of control moment gyroscopes (CMGs), including single-axis and multi-axis configurations, to induce stabilizing torque on hoisted objects by controlling the orientation of a flywheel within a gimbal system, powered by motors and sensors, which can generate more torque than traditional methods without mechanical protrusions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If tag-lines are used to stabilize hoisted objects, then stability is improved, but operation requires ground personnel and unencumbered space which limits usability in hot zones, over water, and remote areas
Solution Approach 1:
The hoisted object is equipped with its own stabilization system (active fin with internal gyroscope) that operates autonomously without requiring ground personnel or external assistance, enabling self-stabilization in environments where ground support is unavailable
Solution Approach 2:
The passive mechanical tag-line system is replaced with an active aerodynamic stabilization system using an active fin and internal gyroscope, transitioning from mechanical ground-based stabilization to self-contained aerodynamic control
2Stability of the object's composition
If active fins are used to stabilize hoisted objects, then aerodynamic stabilization is achieved, but the protruding nature may result in the fin breaking off mid-operation especially in dense terrain
Solution Approach 1:
The fin is designed with reinforcement measures beforehand to prevent breaking off during operation, particularly in dense terrain conditions where mechanical stress is higher
Solution Approach 2:
The active fin changes its angle of attack dynamically in response to angular velocity sensing, allowing it to adapt to varying operational conditions and reduce mechanical stress through controlled movement rather than rigid positioning
3Stability of the object's composition
If active fins are used for stabilization, then aerodynamic control is provided, but effectiveness is reduced at slower rates of movement or when ambient aerodynamic forces are antagonistic
Solution Approach 1:
An internal gyroscope senses the angular velocity of the hoisted object and provides feedback to control the angle of attack of the active fin, enabling continuous adjustment to maintain stabilization effectiveness across varying speeds and ambient aerodynamic conditions
4Adaptability or versatility
If fan matrices are used for multi-dimensional control, then control capability is improved, but the system is susceptible to environmental damage and may not be economical for massive loads
Solution Approach 1:
The complex fan matrix system is replaced by extracting only the essential stabilization function and implementing it through a simpler active fin mechanism that is less susceptible to environmental damage while still providing effective control
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 CMG system effectively stabilizes hoisted objects by reducing spin and sway without the need for ground personnel and is more torque/power efficient, reducing the likelihood of mechanical failure and environmental interaction.
Implementation Method 1
The present invention reduces the angular momentum of an object hoisted by a carrier, such as a helicopter or crane, with torque from one or more control moment gyroscope (CMG) selectively induced by a controller
Implementation Method 2
control moment gyroscope (CMG) used to provide a stabilizing torque, such as counter to a hoisted object's state of spin or sway
Implementation Method 3
A single-axis CMG may comprise a flywheel suspended within a gimbal, wherein orientation of the gimbal and flywheel may be controlled by a gimbal motor
Data Source
AI summary
An apparatus, system, and or method to influence at least one of a position, orientation, or motion of a load suspended by a suspension cable from a carrier, comprisinga housing secured to at least one of a single-axis control moment gyroscope or a multi-axis control moment gyroscope.