Eng Kee Poh

TL;DR: Two fault-tolerant control schemes for spacecraft attitude stabilization with external disturbances are proposed in this brief, based on integral-type sliding mode control strategy to compensate for actuator faults without controller reconfiguration.

TL;DR: In this article, a decentralized adaptive sliding-mode control law is proposed for attitude synchronization in unidirectional satellite laser communication system, which is applicable to general communication topology and is not restricted to ring topology or undirected communications topology.

TL;DR: In this article, a decentralized adaptive sliding mode control law is proposed using undirected interspacecraft communication topology and analyzed based on algebraic graph theory for attitude synchronization and tracking problems in spacecraft formation.

TL;DR: This brief addresses attitude tracking problems for an over-actuated spacecraft in the presence of actuator faults, imprecise fault estimation, and external disturbances by proposing a robust control allocation (RobCA) strategy.

TL;DR: In this paper, the authors focus on the design of a fuel-optimal maneuver strategy to reconfigure satellite formation using a low-thrust propulsion system and cast it as an optimization problem with a desired final satellite formation configuration subject to collision avoidance constraints on the paths of the chief and all deputy satellites.