An Adaptive Damping Network Designed for Strapdown Fiber Optic Gyrocompass System for Ships

Area of Science:

• Marine Navigation Systems
• Control Engineering
• Optical Sensors

Background:

• Strapdown fiber optic gyrocompass (FOGC) systems on ships face dynamic accuracy limitations due to frequent switching between damping and undamping statuses.
• Conventional damping methods struggle with large sea condition changes, leading to system instability and reduced performance.

Purpose of the Study:

• To address the limitations of conventional damping methods in strapdown FOGC systems.
• To design an adaptive control method for the horizontal damping network of strapdown FOGC systems to improve dynamic accuracy.

Main Methods:

• Proposed an adaptive control method to design the horizontal damping network for strapdown FOGC systems.
• Adjusted damping network parameters based on acceleration size to minimize maneuvering-induced errors.
• Transformed damping coefficient jumps into gradual changes for smoother system status transitions.

Main Results:

• The adaptive damping network was applied to strapdown FOGC systems under static and dynamic conditions.
• Performance was compared against conventional damping and undamping methods.
• Experimental results demonstrated the effectiveness of the adaptive damping network in enhancing dynamic performance.

Conclusions:

• The adaptive damping network significantly improves the dynamic performance of strapdown FOGC systems.
• This method minimizes system errors caused by ship maneuvering and ensures smoother status transitions.
• The adaptive approach offers a superior solution for marine navigation accuracy in challenging sea conditions.