The testbed uses magnetic levitation technology to simulate the relative motion between two spacecraft in a frictionless environment, allowing researchers to validate docking algorithms with high precision. The platform supports cutting-edge research on spacecraft autonomy, including proximity operations and docking maneuvers, with both magnetic and mechanical docking.
This research investigates how the Lorentz force (generated when a spacecraft carries an electric charge while moving through Earth's magnetic field) can influence orbital motion and attitude motion. This research opens new possibilities for using electrostatic effects as a low-thrust propulsion alternative for orbital and attitude maneuvers.
This work focuses on enabling rovers to traverse loose and uneven terrains safely and efficiently. The research involves developing advanced algorithms to accurately estimate wheel slip in real time, implementing control strategies to mitigate slippage for maintaining traction, and designing intelligent path planning methods that account for terrain uncertainties to ensure reliable mobility in planetary environments.
The facility features a platform mounted on a spherical air-bearing, which creates a near-frictionless environment to mimic microgravity conditions in space . For actuation, the testbed employs a pyramid configuration of Variable Speed Control Moment Gyros (VSCMGs), while an inertial measurement unit (IMU) provides attitude sensing . A recent advancement includes a tabletop testbed utilizing Control Moment Gyroscopes (CMGs) for real-time testing of attitude control strategies.
Focuses on advanced control strategies that simultaneously manage a spacecraft's orientation (attitude) and position. This integrated approach is essential for complex missions such as satellite servicing, formation flying, and autonomous rendezvous and docking. Research employs techniques like sliding mode control, nonlinear control, and optimal control allocation, with combined actuators such as magneto-Coulombic torquers and gimbaled thrusters.
This facility is designed to enable ground-based testing and validation of technologies critical for spacecraft rendezvous, docking, and formation flying. As part of ongoing development efforts, research includes the implementation of computer vision-based indoor positioning systems to accurately track and control multiple spacecraft mock-ups in a controlled environment. The facility also supports the development of spacecraft attitude determination and control simulators, leveraging reaction wheels to replicate space-like conditions. This testbed can serve as a platform for advancing autonomous proximity operations and validating control algorithms before real-space deployment.
SDFCL is actively engaged in research and development of advanced satellite attitude actuators. The focus is on Reaction Wheels, Control Moment Gyros (CMGs), and Variable Speed CMGs (VSCMGs)- critical components that enable precise pointing and stabilization of spacecraft. These devices in cluster form form the heart of a satellite's attitude control system, providing the necessary torque for maneuvering and maintaining orientation in orbit. Through a combination of analytical modeling, simulation, and hands-on fabrication, the lab aims to develop indigenous technologies.