Design and dynamics of space- station-based one-degree-of-freedom repeatedly deployable exposure platform

Area of Science:

• Space Science and Engineering
• Materials Science
• Robotics and Control Systems

Background:

• Space station platforms are essential for in-situ cosmic dust experiments.
• Existing platforms may lack modularity and precise deployment control.
• Scalability is needed to accommodate varying experimental requirements.

Purpose of the Study:

• To propose a novel, repeatedly deployable exposure platform for space station cosmic-dust experiments.
• To develop a modular system that scales to accommodate multiple panels.
• To analyze control strategies and predict performance for different configurations.

Main Methods:

• Development of a one-degree-of-freedom, modularly scalable platform design.
• Kinematic modeling to define motion space for arbitrary panel numbers.
• Lagrange dynamics modeling to predict torque demand and deployment periods.
• Implementation and testing of a 4-panel prototype with uniform acceleration-deceleration control strategy.

Main Results:

• The proposed platform scales modularly with a folding ratio of 14.09:1.
• Kinematic and dynamic models were established for performance prediction.
• Torque demands for a 4-panel system were calculated at 0.0777 N m and 0.0972 N m for a 40s deployment.
• Minimum deployment periods were reduced to 14.05 s and 12.63 s with a 1 N m torque target.
• Prototype testing confirmed smooth, synchronized deploy-retract functionality.
• Positioning tests achieved absolute accuracies better than 5.42 ± 0.60 mm and repeatability finer than 46 ± 2 μm.

Conclusions:

• The developed platform offers a validated, scalable, and precisely controlled solution for space exposure experiments.
• The modular design and control strategies provide a robust foundation for future space missions.
• The system's performance metrics support its suitability for demanding space environments.