Low-gravity simulator design developed by researchers offers new avenues for space research

engineering researchers wei guo and hamid sanadavi

From left, doctoral student Hamid Sanavandi and Associate Professor Wei Guo, co-authors on a paper published in npj Microgravity that describes a new design for a magnetic levitation-based simulator that creates a low-gravity environment. (Stephen Bilenky/National MagLab)

As humanity continues its exploration of the universe, the low-gravity environment of space presents unusual challenges for scientists and engineers.

Researchers at the FAMU-FSU College of Engineering and the Florida State University-headquartered National High Magnetic Field Laboratory have developed a new tool to help meet that challenge — a novel design for a low-gravity simulator that promises to break new ground for future space research.
Their new design for a magnetic levitation-based low-gravity simulator can create an area of low gravity with a volume about 1,000 times larger than existing simulators of the same type. The work was published in the journal npj Microgravity.
“Low gravity has a profound effect on the behaviors of biological systems and also affects many physical processes from the dynamics and heat transfer of fluids to the growth and self-organization of materials,” said Wei Guo, associate professor in mechanical engineering and lead scientist on the study. “However, spaceflight experiments are often limited by the high cost and the small payload size and mass. Therefore, developing ground-based low-gravity simulators is important.”
Existing simulators, such as drop towers and parabolic aircraft, use free fall to generate near-zero gravity. But these facilities typically have short low-gravity durations, i.e., several seconds to a few minutes, which makes them unsuitable for experiments that require long observation times. On the other hand, magnetic levitation-based simulators (MLS) can offer unique advantages, including low cost, easy accessibility, adjustable gravity and practically unlimited operation time.
But a conventional MLS can only create a small volume of low gravity. When a typical simulator mimics an environment that is about 1 percent of Earth’s gravity, the functional volume is only a few micro-liters, too small for practical space research and applications.

low-gravity engineering diagram
A schematic of the magnet system designed by Sanavandi and Guo. Right: Contour plot of the trapping energy of a water sample placed in the proposed magnet, which shows the size and the shape of the region where the gravity is one percent of the Earth’s gravity. (Courtesy of Wei Guo/FAMU-FSU College of Engineering)