Abstract:
Optical sensor-based systems necessitate a pointing and stabilization mechanism to separate the line-of-sight (LOS) from the operating environment. A gyro-stabilized mirr...Show MoreMetadata
Abstract:
Optical sensor-based systems necessitate a pointing and stabilization mechanism to separate the line-of-sight (LOS) from the operating environment. A gyro-stabilized mirror system (GSMS) can fulfill this requirement. Although this configuration is cost-effective, structured and unstructured nonlinear disturbances, dynamic imbalances, and carrier vibrations deteriorate the system performance. Therefore, it is indispensable to design a control system that has a fast response, high control accuracy, and insensitivity to perturbations. To acquire these attributes for GSMS applications, an improved nonsingular fast terminal sliding mode-based control is proposed in this paper. The prime advantage of the investigated control scheme is that its realization requires only available measurements of the system and control gains without acquiring a priori knowledge of the bounds on system perturbations. Moreover, the developed controller alleviates the main drawback, chattering, in conventional sliding mode control while preserving its robustness to disturbances. The stability of the closed-loop system is proven via the Lyapunov method, and the effectiveness of the proposed control strategy is elucidated through comparative numerical studies.
Published in: IEEE Transactions on Automation Science and Engineering ( Early Access )