Introduction

This patented In-Line Damper aims to provide energy dissipation from a tether, to reduce oscillations and improve dynamical stability, particularly for a conductive tape/tether for space applications.

Technical features

The device is intended for use on satellites and in particular in deorbiting devices for satellites in low earth orbits (LEO). These devices are based on electrodynamic cables or tapes that provide by interaction with the magnetic field an opposing Lorentz (electrodynamic) force on motion to lower the orbital height until atmospheric reentry in compliance with the guidelines for mitigation of human-produced orbital debris.

The patented In-Line Damper is designed to provide energy dissipation from a tether, to reduce oscillations and improve dynamical stability, and at the same time provide electrical continuity between the incoming conductive tape and the outgoing portion that can have a different configuration. The mechanism can be easily scaled to several operative configurations in terms of user environment, mass, length and shape of the tether both for the portions of the tether in and out of the mechanism. Such a structure allows for a very small size and weight while providing the required functionality.

Current TRL is 4-5. Further financing for upscaling will bring TRL to 7-8.

Possible Applications

• LEO satellites deorbiting;
• Space debris removal.

Advantages

• Wire/tape vibration damping;
• Small and lightweight;
•  Electrical continuity;
• High overall robustness;
• Ability to operate over a wide thermal range;
• Simple to manufacture;
• Reliability provided by few moving elements.