Fixed-Time Robust Networked Observers and Its Application to Attitude Synchronization of Spacecraft Systems
Yi Dong, Zhiyong Chen
Abstract
This article studies fixed-time robust networked observers to estimate the information of a leader system containing unknown parameters. The construction of observers combines the internal model principle and the fixed-time control technique in a network with a directed topology. The observers are further applied to the fixed-time attitude synchronization problem for multiple spacecraft systems whose attitudes are represented by unit quaternion. Both rigorous analysis and numerical simulation demonstrate that the fixed-time synchronization of attitude and angular velocity between multiple spacecrafts and a specified leader system is achieved by the observer-based control design.
Topics & Concepts
QuaternionControl theory (sociology)SpacecraftObserver (physics)Synchronization (alternating current)Computer scienceAngular velocityAttitude controlControl (management)Topology (electrical circuits)Control engineeringMathematicsEngineeringArtificial intelligencePhysicsAerospace engineeringGeometryCombinatoricsQuantum mechanicsDistributed Control Multi-Agent SystemsModular Robots and Swarm IntelligenceSpace Satellite Systems and Control