Controller Design of Deployment Process for Large Deployable Reflectors Large deployable reflectors are the key technical equipment to meet the needs of geostationary mobile communication in high rail and earth observation. After being sent to the working track by the spacecraft, the space antenna is driven by a reliable and stable controller to provide a frame for forming a highprecision metal reflecting surface. This paper aims to study the optimal deployment process control strategy and method based on the deployable trajectory for a large deployable antenna. In this paper, the Backstepping controller and fuzzy PID controller are designed respectively based on the model and nonmodel perspectives. The feasibility of the controller is verified by simulation, and the advantages and applications of the controller are illustrated by comparison. The article lays a good foundation for the technical improvement of the antenna system.

Robust Control Approach for Novel Stabilized Platform with Series Elastic Actuator The stabilized platforms are commonly used in mobile systems to stabilize the payload instruments. This paper proposes a novel stabilized platform with series elastic actuator (SEA), which has advantage over traditional stabilized platform in peak acceleration suppression. The novel stabilized platform suppresses disturbance via passive elasticity and active servo control. A robust control scheme is applied to enhance system performance against disturbance by keeping the platform in the state of force balance. The scheme is integrated with time delay estimation (TDE) feedforward and robust integral of signal of error (RISE) feedback. The performance of proposed method is validated on the selfbuilt testbed. Experiment results indicate that the disturbance suppression performance with the proposed control scheme (TDERISE) is evidently better than that of the traditional proportionalintegralderivative (PID) control strategy, showing promising application prospects.