6 papers
Solar Cruiser Disturbance Torque Estimation and Predictive Momentum Management
Ping-Yen Shen, Ryan J. Caverly
This paper presents a novel disturbance-torque-estimation-augmented model predictive control (MPC) framework to perform momentum management on NASA's Solar Cruiser solar sail missi…
Areostationary Satellite Station Keeping Via a Natural Motion Trajectory and Predictive Control
Nathan A. Gall, Robert D. Halverson, Ryan J. Caverly
Areostationary Mars orbit (AMO) satellites will play an important role in future expeditions to the Martian surface due to their strength as navigation and communication satellites…
Solar Sail Momentum Management With Mass Translation and Reflectivity Devices Using Predictive Control
Ping-Yen Shen, Ryan J. Caverly
Solar sails enable propellant-free space missions by utilizing solar radiation pressure as thrust. However, disturbance torques act on the solar sail and effective attitude control…
Passivity-Based Robust Shape Control of a Cable-Driven Solar Sail Boom for the CABLESSail Concept
Soojeong Lee, Ryan J. Caverly
Solar sails provide a means of propulsion using solar radiation pressure, which offers the possibility of exciting new spacecraft capabilities. However, solar sails have attitude c…
Atmospheric Density-Compensating Model Predictive Control for Targeted Reentry of Drag-Modulated Spacecraft
Alex D. Hayes, Ryan J. Caverly
This paper presents an estimation and control framework that enables the targeted reentry of a drag-modulated spacecraft in the presence of atmospheric density uncertainty. In part…
Time-Varying Model Predictive Attitude Control for Magnetically Actuated Dual-Spin Satellites
Robert D. Halverson, Ryan J. Caverly
Attitude control hardware for small satellites is often limited in power and space availability given the importance of the science instruments they exist to transport. To mitigate…