Tensegrity Spacecraft Vibration Control With Variable Dampers
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Solution Overview
Problem
Existing three-dimensional structure spacecrafts with tensegrity structures experience significant vibrations due to air resistance, solar wind disturbances, or landing on satellites/planets, which can disrupt precise observation and measurement devices.
Innovation Solution
Incorporation of variable damping force dampers in the compression or tension members to generate a predetermined force that attenuates vibrations, using electromagnetic-induced electromotive forces to adjust tension and maintain structural stability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Weight of moving object
If a tensegrity structure is used for the spacecraft, then the spacecraft becomes lightweight and achieves high structural stability, but vibrations occur throughout the spacecraft during ejection, posture control, or when subjected to external disturbances
Solution Approach 1:
The patent applies dynamics by making the damping force variable rather than fixed. The damping coefficient is adjusted in real-time based on the spacecraft's operational state and vibration levels, allowing the structure to adaptively respond to different vibration conditions while maintaining lightweight tensegrity configuration
Solution Approach 2:
The patent changes the physical parameter of damping force from a constant value to a variable value that can be dynamically adjusted. By modifying the damping coefficient parameter based on operational requirements and vibration measurements, the system optimizes vibration suppression effectiveness across different mission phases
2Measurement precision
If precise observation devices and measurement devices are installed in the spacecraft, then observation precision is improved, but the devices require suppression of even slight vibrations to function properly
Solution Approach 1:
The patent implements feedback control by continuously monitoring vibration levels and adjusting the damping force accordingly. Sensors detect vibration characteristics and feed this information back to the control system, which then modifies the damping coefficient to maintain optimal vibration suppression for precise observation devices
Solution Approach 2:
The damping system dynamically adjusts its characteristics based on real-time vibration conditions, ensuring that precise observation devices operate in a stable environment. The variable damping force adapts to different operational scenarios, providing consistent vibration suppression protection
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 suppresses vibrations, maintaining the spacecraft's shape and functionality during operations, preventing component breakage and ensuring precise device performance.
Implementation Method 1
A variable damping force damper is disposed in at least either the compression members or the tension members. The variable damping force damper is configured to generate a predetermined force in a longitudinal direction of the compression members or in a longitudinal direction of the tension members.
Implementation Method 2
using electromagnetic-induced forces to adjust tension and maintain optimal posture and shape
Data Source
AI summary
A three-dimensional structure spacecraft having a tensegrity structure appropriately controls a vibration even when the three-dimensional structure spacecraft is subjected to air resistance, solar wind disturbance, or the like, lands a satellite or a planet, and performs work or the like. The three-dimensional structure spacecraft includes a plurality of compression members and a plurality of tension members. Three or more of the tension members are connected to each of ends of the compression members. A three-dimensional structure formed by the compression members and the tension members is maintained by tension of the tension members. A variable damping force damper is disposed in at least either the compression members or the tension members. The variable damping force damper is configured to generate a predetermined force in a longitudinal direction of the compression members or in a longitudinal direction of the tension members.