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Micro-Vibration Control of Deployable Space Optical Imaging System Using Distributed Active Vibration Absorbers.
Zhuo Chen1, Guangyuan Wang1, Chuanwen Zhu1
1China Academy of Space Technology, Beijing 100080, China.
Sensors (Basel, Switzerland)
|February 26, 2025
Summary
This study introduces a distributed vibration control method with attachable absorbers for large space structures. The novel approach effectively reduces micro-vibrations, achieving a 90% reduction in 4 seconds.
Area of Science:
- Aerospace Engineering
- Mechanical Engineering
- Control Systems
Background:
- Large space structures require precise micro-vibration control to maintain operational stability.
- Existing vibration control methods may face challenges with complexity and scalability for large structures.
Purpose of the Study:
- To develop and validate a distributed vibration control method using attachable absorbers for large space payloads.
- To investigate the effectiveness of a multi-channel active noise control (ANC) configuration for micro-vibration mitigation.
Main Methods:
- Modeling the distributed vibration control system at three levels, including absorber simplification.
- Extending a single-channel ANC controller to a multi-channel configuration.
- Employing Simulink-GA hybrid optimization for parameter convergence in simulations.
Main Results:
- The voltage-force output of the absorber was simplified to a second-order system in the low-frequency range.
- Optimized parameters successfully controlled vibrations across all channels in simulations.
- Experimental results showed a 90% vibration reduction in 4 seconds on a 12 sub-mirror structure model.
Conclusions:
- The distributed vibration control method effectively mitigates micro-vibrations in large space structures.
- Channel coupling slightly impacts convergence speed but not the final control outcome.
- The system demonstrates simultaneous control of multiple components, maintaining structural flatness under disturbance.
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