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The NASA innovation leverages existing ballast fluid of a maritime structure to proactively mitigate undesirable resonant response characteristics of the platform or vessel. Essentially, this innovation couples water ballast as a functional working mass to the dynamic motion of a floating structure in order to provide passive motion management of the primary structure. The system can be implemented pre-design or post manufacture. The systems are simple and are easily manufactured, transported, and implemented onto a primary structure. The NASA technology has been designed (patents applied for) for a range of platform designs and can be further customized depending on the final application requirements. Prototypes have been built and tested in a wind-wave tank test bed at the University of Maine.

When waves move a floating wind turbine, they drive fluid motion inside the MTLCD. This forces air in the vertical tanks through an orifice, increasing pressure much like a spring. As the air discharges, the fluid’s motion is damped and energy is dissipated. The MTLCD also incorporates added damping elements, such as an orifice or variable-aperture reciprocating reed valve, that create resistance to air flow, further controlling fluid motion and dissipating energy. By integrating these modifications, the MTLCD is easily tuned to the platform’s motions, reducing dependency on platform geometry. Eliminating damping elements from the fluid removes the need for marine-grade hardware, reducing system costs. The MTLCD can also be integrated into existing ballast tanks, maximizing space efficiency with minimal added parts. While initially developed for NASA’s Floating Wind Turbine Development project, this invention can support vibration mitigation applications across multiple industries, such as infrastructure, maritime systems, and aerospace. By enabling precise tuning of dynamic response characteristics, the MTLCD offers a compact solution for platforms requiring vibration suppression. The technology has completed preliminary design and simulation, is at a TRL 3 (proof-of-concept), and is available for patent licensing.