Microgravity Exercise Counterbalance for Spacecraft Vibration Reduction
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Solution Overview
Problem
In microgravity environments, exercise devices generate significant forces and vibrations that can be detrimental to the performance and operation of vehicles like spacecraft, as existing devices poorly mitigate these transmissions.
Innovation Solution
A device with a counterbalance mechanism, comprising a first member for user support and a second member with a counterbalance portion, allowing both to slide in opposite directions, maintaining a fixed combined center of mass and reducing vibrations, along with dampening members for further reduction of residual vibrations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If an exercise device is used in a spacecraft, then users can maintain physical fitness, but forces and vibrations are transmitted to the spacecraft structure causing performance degradation
Solution Approach 1:
The patent employs a counterbalance mechanism where a counterbalance mass is positioned on the opposite side of the exercise device's moving components. As the user performs exercises that move the first member along the guide rail, the counterbalance mass moves in the opposite direction, creating counteracting forces that neutralize the net forces and vibrations transmitted to the spacecraft structure.
Solution Approach 2:
The exercise device is divided into separate functional components: a fixed support structure, a movable first member for user exercise, a guide rail system, and a counterbalance mechanism. This segmentation allows the exercise function to be isolated from the spacecraft structure through the guide rail, while the counterbalance mechanism separately manages force transmission.
2Stability of the object's composition
If a fixed exercise device structure is used, then structural stability is maintained, but the device generates high forces and vibrations during exercise
Solution Approach 1:
The patent transitions from a completely fixed structure to a semi-dynamic structure where the first member can move along the guide rail. This controlled movement allows the device to adapt to exercise motions while the guide rail and counterbalance mechanism dynamically adjust to maintain overall stability and minimize force transmission.
Solution Approach 2:
The guide rail acts as an intermediary between the movable first member and the fixed support structure. It provides a controlled path for movement while isolating the fixed structure from direct force transmission. The counterbalance mechanism serves as another intermediary that mediates force distribution to reduce vibrations.
3Object-generated harmful factors
If the first member is made movable to reduce forces, then force transmission is reduced, but device complexity increases
Solution Approach 1:
Instead of making the entire device complex and movable, the patent applies movement locally only to the first member where it is needed for exercise functionality. The support structure and counterbalance mechanism remain relatively simple and fixed, concentrating the complexity only where it provides the most benefit for force reduction.
Solution Approach 2:
The patent extracts the movement function from the entire device structure and isolates it to just the first member. This allows the rest of the device to remain simple and fixed, while only the necessary component (first member) gains mobility to reduce force transmission during exercise.
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
Effectively minimizes the transmission of forces and vibrations to the surroundings, ensuring stable operation and comfort during use, while allowing for adjustable resistance and storage capabilities suitable for space-constrained environments.
Implementation Method 1
a second member, attached to the first member, comprising a counterbalance portion; wherein the first member and the second member are each moveable, and operable to slide with respect to each other in opposite directions
Implementation Method 2
the combined center of mass of the device and its user remains substantially fixed
Implementation Method 3
The assembly may comprise at least one dampening member, wherein the device is attached to the first end of the support member via the at least one dampening member
Data Source
AI summary
A device including a first member for supporting a user; and a second member 14, attached to the first member, including a counterbalance portion. The first member and the second member are each moveable, and operable to slide with respect to each other in opposite directions, between a first position and a second position. The device can be operable such that between the first and second positions, the combined center of mass of the device 10 and its user remains substantially fixed. This serves to reduce the extent of forces and vibrations generated by use of the device on the object to which the device is located.