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Lead-time composite control of the single-gimbal control moment gyro under multi-source disturbances
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DOI：10.1016/j.isatra.2026.05.001.png)
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Abstract
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• An innovative lead-time control strategy is proposed, which enables accurate calculation of the system convergence time and avoids the unbounded gain growth problem inherent in traditional prescribed-time control methods. • By employing an inner-outer loop observer architecture, multi-source disturbance separation, dynamic reconstruction, and refined estimation are achieved, thereby enhancing the system’s tracking accuracy and disturbance rejection performance. • A lead-time second-order integral sliding mode controller is employed, which combines a powered integrator with a super-twisting-like structure. This effectively eliminates steady-state error while significantly suppressing chattering and markedly enhancing the dynamic smoothness of the system. • For control moment gyroscopes in a flexible support environment, the adoption of a lead-time composite control strategy achieves multi-source cooperative compensation and chattering suppression, thereby accomplishing comprehensive performance characterized by ultra-precision, ultra-quietness, and ultra-agility.
Keywords:
lead-time control
composite control
disturbance rejection
sliding mode control
control moment gyroscope
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