75 citations · 119 across the 10 of their papers we have counts for
11 papers
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 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…
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…
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…
Filtering-Linearization: A First-Order Method for Nonconvex Trajectory Optimization with Filter-Based Warm-Starting
Minsen Yuan, Ryan J. Caverly, Yue Yu
Nonconvex trajectory optimization is at the core of designing trajectories for complex autonomous systems. A challenge for nonconvex trajectory optimization methods, such as sequen…
Autonomous Station Keeping of Satellites in Areostationary Mars Orbit: A Predictive Control Approach
Robert D. Halverson, Avishai Weiss, Gabriel Lundin +1
The continued exploration of Mars will require a greater number of in-space assets to aid interplanetary communications. Future missions to the surface of Mars may be augmented wit…
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…
Robust Local Stabilization of Nonlinear Systems with Controller-Dependent Norm Bounds: A Convex Approach with Input-Output Sampling
Sze Kwan Cheah, Diganta Bhattacharjee, Maziar S. Hemati +1
This letter presents a framework for synthesizing a robust full-state feedback controller for systems with unknown nonlinearities. Our approach characterizes input-output behavior…
Adaptive Passivity-Based Pose Tracking Control of Cable-Driven Parallel Robots for Multiple Attitude Parameterizations
Sze Kwan Cheah, Alex Hayes, Ryan J. Caverly
The proposed control method uses an adaptive feedforward-based controller to establish a passive input-output mapping for the CDPR that is used alongside a linear time-invariant st…
LMI Properties and Applications in Systems, Stability, and Control Theory
Ryan James Caverly, James Richard Forbes
Linear matrix inequalities (LMIs) commonly appear in systems, stability, and control applications. Many analysis and synthesis problems in these areas can be solved as feasibility…